{"id":993,"date":"2021-01-25T01:59:17","date_gmt":"2021-01-24T16:59:17","guid":{"rendered":"https:\/\/skyit.biz\/?p=993"},"modified":"2021-01-25T02:04:25","modified_gmt":"2021-01-24T17:04:25","slug":"%e7%ac%ac11%e7%ab%a0ddl%e6%96%87%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%9f%e8%a1%a8%e3%81%ae%e4%bd%9c%e6%88%90%e3%81%a8%e7%ae%a1%e7%90%86","status":"publish","type":"post","link":"https:\/\/skyit.biz\/?p=993","title":{"rendered":"\u7b2c11\u7ae0\tDDL\u6587\u3092\u4f7f\u7528\u3057\u305f\u8868\u306e\u4f5c\u6210\u3068\u7ba1\u7406"},"content":{"rendered":"\n<p>11.1\u3000\u8868\u306e\u4f5c\u6210\u3068\u524a\u9664<br>\u30b9\u30ad\u30fc\u30de\u3068\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u3001\u8ad6\u7406\u7684\u306a\u6982\u5ff5\u3067\u3042\u308b\u3002<br>Oracle\u30b5\u30fc\u30d0\u306e\u5404\u30e6\u30fc\u30b6\u306f\u3001\u30e6\u30fc\u30b6\u540d\u3068\u540c\u3058\u540d\u524d\u306e\u30b9\u30ad\u30fc\u30de\u3092\uff11\u3064\u6240\u6709\u3057\u3066\u3044\u308b\u3002<br>\u5404\u30e6\u30fc\u30b6\u304c\u4f5c\u6210\u3057\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u305d\u306e\u30e6\u30fc\u30b6\u304c\u6240\u6709\u3059\u308b\u30b9\u30ad\u30fc\u30de\u306b\u683c\u7d0d\u3055\u308c\u308b\u3002<\/p>\n\n\n\n<p>\u30b9\u30ad\u30fc\u30de\u306f\u3001\u30e6\u30fc\u30b6\u304c\u6240\u6709\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30ea\u30b9\u30c8\u3067\u3042\u308b\u3002<br>\u30b9\u30ad\u30fc\u30de\u306f\u3001\u3042\u304f\u307e\u3067\u3082\u8ad6\u7406\u7684\u306a\u6982\u5ff5\u3067\u3042\u308b\u305f\u3081\u3001\u5b9f\u969b\u306b\u9818\u57df\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3002<\/p>\n\n\n\n<p>\u25a0\u5225\u306e\u30e6\u30fc\u30b6\u304c\u6240\u6709\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53c2\u7167\u3059\u308b\u65b9\u6cd5<br>\u3042\u308b\u30e6\u30fc\u30b6\u304c\u3001\u81ea\u8eab\u304c\u6240\u6709\u3059\u308b\u30b9\u30ad\u30fc\u30de\u4ee5\u5916\u306e\u30b9\u30ad\u30fc\u30de\u5185\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53c2\u7167\u3059\u308b\u5834\u5408\u306f\u3001<br>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540d\u306b\u63a5\u982d\u8f9e\uff08\u30b9\u30ad\u30fc\u30de\u540d\uff09\u3092\u4ed8\u3051\u3066\u3001\u30b9\u30ad\u30fc\u30de\u540d.\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540d\u306e\u5f62\u5f0f\u3067\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n\n\n<p>\u25bc\u5225\u306e\u30e6\u30fc\u30b6\u304c\u6240\u6709\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u53c2\u7167<br>\u30b9\u30ad\u30fc\u30de\u540d.\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540d<\/p>\n\n\n\n<p>\u4f8b\uff09ORA02\u30e6\u30fc\u30b6\u304c\u3001ORA01\u30e6\u30fc\u30b6\u306e\u6240\u6709\u3059\u308b\u30b9\u30ad\u30fc\u30de\u5185\u306eEMP\u8868\u3092\u53c2\u7167\u3059\u308b\u5834\u5408\u306f\u3001<br>ora01.EMP<br>\u3068\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n\n\n<p>\u30e6\u30fc\u30b6\u306f\u3001\u30e6\u30fc\u30b6\u540d\u3068\u540c\u3058\u540d\u524d\u306e\u30b9\u30ad\u30fc\u30de\u3092\uff11\u3064\u6240\u6709\u3059\u308b\u3002<br>\u4ed6\u306e\u30e6\u30fc\u30b6\u304c\u6240\u6709\u3059\u308b\u30b9\u30ad\u30fc\u30de\u5185\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53c2\u7167\u3059\u308b\u306b\u306f\u3001\u30b9\u30ad\u30fc\u30de\u540d.\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540d\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n\n\n<p>\u25a0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u547d\u540d\u898f\u5247<br>\u30fb\u9577\u3055\u306f\u300130\u30d0\u30a4\u30c8\u4ee5\u4e0b\uff08\u6587\u5b57\u6570\u3067\u306f\u306a\u304f\u3001\u30d0\u30a4\u30c8\u6570\uff09<br>\u30fb\u5148\u982d\u306e\u6587\u5b57\u306f\u3001\u6570\u5b57\u4ee5\u5916\u306e\u6587\u5b57\uff08\u6570\u5b57\u304a\u3088\u3073\u8a18\u53f7\u306f\u4e0d\u53ef\uff09<br>\u30fb\u4f7f\u7528\u3067\u304d\u308b\u6587\u5b57\u306f\u3001\u82f1\u6570\u5b57\uff08A\uff5eZ\u3001a\uff5ez\u30010\uff5e9\uff09\u304a\u3088\u3073\u3001\u6f22\u5b57\u3001\u30ab\u30bf\u30ab\u30ca\u3001\u3072\u3089\u304c\u306a\uff08\u65e5\u672c\u8a9e\u74b0\u5883\u306e\u5834\u5408\uff09<br>\u30fb\u4f7f\u7528\u3067\u304d\u308b\u8a18\u53f7\u306f\u3001_\u30a2\u30f3\u30c0\u30fc\u30d0\u30fc\u3001$\u3001#\u306e3\u7a2e\u985e\u306e\u307f\u3002<br>\u30fb\u540c\u4e00\u306e\u30b9\u30ad\u30fc\u30de\u5185\u3067\u91cd\u8907\u3059\u308b\u540d\u524d\u306f\u3001\u6307\u5b9a\u3067\u304d\u306a\u3044\u3002<br>\u30fbOracle\u30b5\u30fc\u30d0\u306e\u4e88\u7d04\u8a9e\uff08SELECT\u3001FROM\u3001ORDER\u306a\u3069\uff09\u306f\u4f7f\u7528\u3067\u304d\u306a\u3044\u3002<br>\u30fb\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u306e\u5927\u6587\u5b57\u30fb\u5c0f\u6587\u5b57\u306f\u533a\u5225\u3055\u308c\u306a\u3044\u3002<\/p>\n\n\n\n<p>\u25a0\u8868\u306e\u4f5c\u6210<br>CREATE TABLE \u8868\u540d<br>\uff08\u5217\u540d\u3000\u30c7\u30fc\u30bf\u578b<br>\uff09\uff1b<\/p>\n\n\n\n<p>\u25a0DEFAULT\u30aa\u30d7\u30b7\u30e7\u30f3<br>\u5217\u306e\u5b9a\u7fa9\u306bDEFAULT\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u305d\u306e\u5217\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8a2d\u5b9a\u3067\u304d\u308b\u3002<br>\u5217\u540d\u3000\u30c7\u30fc\u30bf\u578b\u3000[DEFAULT \u5f0f]<\/p>\n\n\n\n<p>\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306b\u306f\u3001\u30ea\u30c6\u30e9\u30eb\u5024\u3001\u5f0f\u307e\u305f\u306f\u3001SQL\u95a2\u6570(SYSDATE\u3084USER\u306a\u3069)\u3092\u6307\u5b9a\u3067\u304d\u308b\u3002<br>NEXTVAL\u7591\u4f3c\u5217<br>CURRVAL\u7591\u4f3c\u5217<br>\u5225\u306e\u5217\u306e\u540d\u524d\u306f\u6307\u5b9a\u3067\u304d\u306a\u3044\u3002<\/p>\n\n\n\n<p>\u25bc\u91cd\u8981<br>\u8868\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u3001CREATE TABLE\u6a29\u9650\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002<br>DEFAULT\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u4efb\u610f\u306e\u5217\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8a2d\u5b9a\u3067\u304d\u308b\u3002<br>DEFAULT\u5024\u306b\u306f\u3001\u30ea\u30c6\u30e9\u30eb\u3001\u5f0f\u3001SQL\u95a2\u6570\uff08SYSDATE\u3001USER\u306a\u3069\uff09\u3092\u6307\u5b9a\u3067\u304d\u308b\u3002<br>DEFAULT\u5024\u306b\u306f\u3001\u5225\u306e\u5217\u306e\u540d\u524d\u306f\u3001\u6307\u5b9a\u3067\u304d\u306a\u3044\u3002<\/p>\n\n\n\n<p>\u25a0\u8868\u306e\u524a\u9664<br>\u8868\u3092\u524a\u9664\u3059\u308b\u306b\u306f\u3001DROP TABLE\u6587\u3092\u4f7f\u7528\u3059\u308b\u3002<br>DROP TABLE\u6587\u306e\u57fa\u672c\u69cb\u6587\u306f\u3001<br>DROP TABLE \u8868\u540d[PURGE];<br>\u8868\u306e\u6240\u6709\u8005\u307e\u305f\u306f\u3001DROP ANY TABLE\u6a29\u9650\u3092\u6301\u3064\u30e6\u30fc\u30b6\u306e\u307f\u3001\u8868\u3092\u524a\u9664\u3067\u304d\u308b\u3002<\/p>\n\n\n\n<p>\u8868\u3092\u524a\u9664\u3059\u308b\u3068\u3001\u8868\u5185\u306e\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u306b\u52a0\u3048\u3066\u3001\u8868\u306b\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u5236\u7d04\u3084\u7d22\u5f15\u3082\u524a\u9664\u3055\u308c\u308b\u3002<br>\u4e00\u65b9\u3067\u3001\u8868\u3092\u53c2\u7167\u3059\u308b\u30d3\u30e5\u30fc\u3084\u30b7\u30ce\u30cb\u30e0\u306f\u524a\u9664\u3055\u308c\u305a\u3001\u7121\u52b9\u306b\u306a\u308b\u3060\u3051\u3002<br>DROP TABLE\u6587\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u8868\u306f\u3001\u30b4\u30df\u7bb1\u306b\u79fb\u52d5\u3057\u3066\u3001\u5b8c\u5168\u306b\u524a\u9664\u3055\u308c\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3002\u8868\u9818\u57df\u306f\u89e3\u653e\u3055\u308c\u306a\u3044\u306e\u3067\u3001\u518d\u5229\u7528\u306f\u3067\u304d\u306a\u3044\u3002<br>\u8868\u306e\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u3068\u8868\u306e\u69cb\u9020\u304c\u524a\u9664\u3055\u308c\u308b\u3002<br>\u8868\u3092\u5b8c\u5168\u306b\u524a\u9664\u3059\u308b\u306b\u306f\u3001PURGE\u53e5\u3092\u6307\u5b9a\u3059\u308b\u3002<\/p>\n\n\n\n<p>\u8868\u306e\u5b8c\u5168\u524a\u9664<br>DROP TABLE EMP1 PURGE;<br>\u524a\u9664\u3055\u308c\u305f\u8868\u3092\u30b4\u30df\u7bb1\u304b\u3089\u5fa9\u5143\u3059\u308b\u306b\u306f\u3001FLASHBACK TABLE\u6587\u3092\u4f7f\u7528\u3059\u308b\u3002<\/p>\n\n\n\n<p>\u25a011.2\u3000\u30c7\u30fc\u30bf\u578b<\/p>\n\n\n\n<p>\u25a0\u30c7\u30fc\u30bf\u578b\u3068\u306f\u3001<br>\u30c7\u30fc\u30bf\u578b\u3068\u306f\u3001Oracle\u30b5\u30fc\u30d0\u3067\u6271\u3046\u30c7\u30fc\u30bf\u306e\u5f62\u5f0f\u306e\u3053\u3068\u3002<br>\u30c7\u30fc\u30bf\u578b\u306f\u8868\u306e\u4f5c\u6210\u6642\u306b\u5217\u3054\u3068\u306b\u5b9a\u7fa9\u3059\u308b\u3002<br>\u5217\u306b\u306f\u5b9a\u7fa9\u3055\u308c\u305f\u30c7\u30fc\u30bf\u578b\u306e\u30c7\u30fc\u30bf\u3057\u304b\u683c\u7d0d\u3067\u304d\u306a\u3044\u3002<\/p>\n\n\n\n<p>\u25a0\u6587\u5b57\u578b<br>VARCHAR2\u578b<br>CHAR\u578b<br>LONG\u578b<br>CLOB\u578b<br>NCLOB\u578b<\/p>\n\n\n\n<p>\u25bc\u6587\u5b57\u578b\u306e\u5b9a\u7fa9\u65b9\u6cd5<br>\u5217\u540d\u3000VARCHAR2(\u6700\u5927\u30b5\u30a4\u30ba)<br>\u5217\u540d\u3000CHAR[(\u6700\u5927\u30b5\u30a4\u30ba)]<br>\u5217\u540d\u3000LONG<br>\u5217\u540d\u3000CLOB<br>\u5217\u540d\u3000NCLOB<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>VARCHAR2\u578b           CHAR\u578b<\/code><\/pre>\n\n\n\n<p>\u6700\u5927\u30b5\u30a4\u30ba 4000\u30d0\u30a4\u30c8 2000\u30d0\u30a4\u30c8<\/p>\n\n\n\n<p>\u25a0LONG\u578b\u306e\u5236\u9650<br>LONG\u578b\u306f\u3001VARCHAR2\u578b\u3084CHAR\u578b\u306e\u5217\u306b\u306f\u683c\u7d0d\u3067\u304d\u306a\u3044\u3002<br>\u5927\u304d\u306a\u6587\u5b57\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3067\u304d\u308b\u30c7\u30fc\u30bf\u578b\u306e\u305f\u3081\u3001LONG\u578b\u3092\u5b9a\u7fa9\u3057\u305f\u5217\u3067\u306f\u3001\u5236\u9650\u304c\u3042\u308b\u3002<br>\u30fb\u526f\u554f\u5408\u305b\u3092\u4f7f\u7528\u3057\u305f\u8868\u306e\u4f5c\u6210\u6642\u306b\u3001LONG\u5217\u306f\u30b3\u30d4\u30fc\u3067\u304d\u306a\u3044\uff08\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\uff09<br>\u30fbLONG\u5217\u306f\u3001GROUP BY\u53e5\u3068ODER BY\u53e5\u306b\u6307\u5b9a\u3067\u304d\u306a\u3044\u3002<br>\u30fbLONG\u5217\u306f\u3001\uff11\u3064\u306e\u8868\u306b\uff11\u3064\u3060\u3051\u5b9a\u7fa9\u3067\u304d\u308b\u3002\uff08LONG\u5217\u307e\u305f\u306f\u3001LONG RAW\u5217\u306e\u3069\u3061\u3089\u304b\uff11\u3064\u3060\u3051\uff09<br>\u30fbLONG\u5217\u306b\u306f\u3001\u5236\u7d04\u3092\u5b9a\u7fa9\u3067\u304d\u306a\u3044\u3002<\/p>\n\n\n\n<p>\u25a0\u6570\u5024\u578b<br>\u5217\u306b\u6570\u5024\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b\u306b\u306f\u3001NUMBER\u578b\u3092\u7528\u3044\u308b\u3002<\/p>\n\n\n\n<p>\u6700\u5927\u7cbe\u5ea6\u3068\u4f4d\u53d6\u308a\u306e\u4e21\u65b9\u3092\u7701\u7565\u3059\u308b\u3068\u3001\u6700\u592738\u6841\u306e\u6709\u50cd\u5c0f\u6570\u70b9\u3092\u683c\u7d0d\u3067\u304d\u308b\u3002<\/p>\n\n\n\n<p>\u4f8b\uff09NUMBER(5,2)\u3092\u5b9a\u7fa9\u3057\u305f\u5834\u5408\u3001<br>123.456\u306e\u5024\u3092\u30bb\u30c3\u30c8\u3059\u308b\u3068\u3001\uff15\u6841\u3067\u5c0f\u6570\u70b9\u7b2c\uff12\u4f4d\u307e\u3067\u306e\u5024\u3068\u306a\u308a\u3001\u305d\u308c\u4ee5\u4e0b\u3092\u56db\u6368\u4e94\u5165\u3059\u308b\u3002\u306e\u3067\u3001123.46\u304c\u683c\u7d0d\u3055\u308c\u308b\u3002<\/p>\n\n\n\n<p>\u25a0\u65e5\u4ed8\u578b<\/p>\n\n\n\n<p>DATE\u578b\u306f\u3001\u30b5\u30a4\u30ba\u6307\u5b9a\u3067\u304d\u306a\u3044\u3002<\/p>\n\n\n\n<p>\u25a0\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u578b<\/p>\n\n\n\n<p>\u30c7\u30fc\u30bf\u578b \u8aac\u660e<br>RAW\u578b \u6700\u59272000\u30d0\u30a4\u30c8\u307e\u3067\u306e\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3067\u304d\u308b\u3002\u53ef\u5909\u9577\u30c7\u30fc\u30bf\u578b\u3002\u6700\u5927\u30b5\u30a4\u30ba\u306e\u6307\u5b9a\u306f\u7701\u7565\u3067\u304d\u306a\u3044\u3002<br>LONG RAW\u578b \u6700\u59272GB\u307e\u3067\u306e\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3067\u304d\u308b\u3002\u53ef\u5909\u9577\u30c7\u30fc\u30bf\u578b\u3002LONG\u578b\u3068\u540c\u69d8\u306e\u5236\u9650\u304c\u3042\u308b\u3002<br>BLOB\u578b \u6700\u59274GB\u307e\u3067\u306e\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3067\u304d\u308b\u30c7\u30fc\u30bf\u578b\u3002<br>BFILE\u578b \u6700\u59274GB\u307e\u3067\u306e\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3067\u304d\u308b\u3001\u8aad\u307f\u53d6\u308a\u5c02\u7528\u30c7\u30fc\u30bf\u578b\u3002BFILE\u578b\u304c\u5b9a\u7fa9\u3055\u308c\u305f\u5217\u306b\u683c\u7d0d\u3057\u305f<br>\u30c7\u30fc\u30bf\u306f\u3001Oracle\u30b5\u30fc\u30d0\u306e\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u4e0a\u3067\u306f\u306a\u304f\u3001OS\u4e0a\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u4fdd\u5b58\u3055\u308c\u308b\u3002<\/p>\n\n\n\n<p>\u25a0ROWID\u578b<br>ROWID\u306f\u3001\u8868\u306e\u5404\u884c\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u3066\u3044\u308b\u4e00\u610f\u306e\u30a2\u30c9\u30ec\u30b9\uff08BASE64\u6587\u5b57\u5217\uff09\u3067\u3042\u308b\u3002<\/p>\n\n\n\n<p>\u25a0\u305d\u306e\u4ed6\u306e\u30c7\u30fc\u30bf\u578b<\/p>\n\n\n\n<p>TIMESTAMP\u578b<br>INTERVAL YEAR TO MONTH\u578b 2\u3064\u306e\u65e5\u4ed8\u30fb\u6642\u523b\u306e\u9593\u9694\u3092\u5e74\u3001\u304a\u3088\u3073\u6708\u306e\u5358\u4f4d\u3067\u683c\u7d0d\u3059\u308b\u3002<br>INTERVAL DAY TO SECOND\u578b 2\u3064\u306e\u65e5\u4ed8\u30fb\u6642\u523b\u306e\u9593\u9694\u3092\u65e5\u3001\u6642\u3001\u5206\u3001\u79d2\u306e\u5358\u4f4d\u3067\u683c\u7d0d\u3059\u308b\u3002<\/p>\n\n\n\n<p>TIMESTAMP\u578b DATE\u578b\u3092\u62e1\u5f35\u3057\u305f\u30c7\u30fc\u30bf\u578b\u3067\u3042\u308b\u3002DATE\u65b9\u306e\u5217\u304c\u683c\u7d0d\u3067\u304d\u308b\u3002\u6708\u65e5\u6642\u5206\u79d2\u3001\u79d2\u306e\u5c0f\u6570\u70b9\u4ee5\u4e0b\u3082\u683c\u7d0d\u3059\u308b\u3002<\/p>\n\n\n\n<p>TIMESTAMP WITH TIME ZONE \u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u6642\u5dee\u3092\u542b\u3080\u3002\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u6642\u5dee\u306f\u3001\u5217\u306e\u4e00\u90e8\u3068\u3057\u3066\u683c\u7d0d\u30fb\u8868\u793a\u3055\u308c\u308b\u3002<br>TIMESTAMP WITH LOCAL TIMEZONE \u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u6642\u5dee\u3092\u542b\u3080\u3002\u5217\u306e\u4e00\u90e8\u3068\u3057\u3066\u683c\u7d0d\u305b\u305a\u3001<br>\u30c7\u30fc\u30bf\u53d6\u5f97\u6642\u306b\u30ed\u30fc\u30ab\u30eb\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u5024\u3067\u8868\u793a\u3055\u308c\u308b\u3002<\/p>\n\n\n\n<p>\u25a011.3\u3000\u5236\u7d04\u306e\u7a2e\u985e\u3068\u6307\u5b9a\u65b9\u6cd5<\/p>\n\n\n\n<p>\u25a0\u5236\u7d04\u3068\u306f\u3001<br>\u5236\u7d04\u3068\u306f\u3001\u8868\u306b\u683c\u7d0d\u3059\u308b\u30c7\u30fc\u30bf\u306b\u95a2\u3059\u308b\u30eb\u30fc\u30eb\u3002<\/p>\n\n\n\n<p>\u5236\u7d04\u306e\u30c1\u30a7\u30c3\u30af\u306f\u3001\u30c7\u30fc\u30bf\u306e\u5909\u66f4\u6642\uff08\u8ffd\u52a0\u3001\u66f4\u65b0\u3001\u524a\u9664\uff09\u306b\u81ea\u52d5\u7684\u306b\u884c\u308f\u308c\u308b\u3002<br>\u25bc\u5236\u7d04\u306e\u7a2e\u985e<br>NOT NULL\u5236\u7d04 NULL\u5024\u3092\u8a31\u53ef\u3057\u306a\u3044\u3002<br>UNIQUE\u5236\u7d04\uff08\u4e00\u610f\u5236\u7d04\uff09 \u91cd\u8907\u5024\u3092\u8a31\u53ef\u3057\u306a\u3044\u3002\u8907\u6570\u306eNULL\u5024\u306f\u3001\u8a31\u53ef\u3059\u308b\u3002<br>PRIMARY KEY\u5236\u7d04(\u4e3b\u30ad\u30fc\u5236\u7d04) \u8868\u5185\u306e\u5404\u884c\u3092\u4e00\u610f\u306b\u8b58\u5225\u3067\u304d\u308b\u5024\u306e\u307f\u8a31\u53ef\u3059\u308b\u3002\u91cd\u8907\u5024\u304a\u3088\u3073NULL\u5024\u306f\u3001\u8a31\u53ef\u3057\u306a\u3044\u3002<br>FOREIGN KEY \u53c2\u7167\u5148\u306e\u5217\u306b\u3042\u308b\u5024\u307e\u305f\u306f\u3001NULL\u5024\u306e\u307f\u8a31\u53ef\u3059\u308b\u3002<br>\uff08\u5916\u90e8\u30ad\u30fc\u5236\u7d04\u30fb\u53c2\u7167\u6574\u5408\u6027\u5236\u7d04\uff09 \u5217\u30ec\u30d9\u30eb\u3067\u8a18\u8ff0\u3059\u308b\u6642\u306f\u3001FOREIGN KEY\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u4f7f\u308f\u306a\u3044\u3002<br>CHCK\u5236\u7d04\uff08\u30c1\u30a7\u30c3\u30af\u5236\u7d04\uff09 \u6307\u5b9a\u3057\u305f\u6761\u4ef6\u306b\u5408\u3046\u5024\u306e\u307f\u8a31\u53ef\u3059\u308b\u3002<\/p>\n\n\n\n<p>\u25a0\u5236\u7d04\u306e\u5b9a\u7fa9\u65b9\u6cd5<br>\u5236\u7d04\u306f\u3001\u5217\u30ec\u30d9\u30eb\u307e\u305f\u306f\u3001\u8868\u30ec\u30d9\u30eb\u3067\u5b9a\u7fa9\u3067\u304d\u308b\u3002<br>\u5217\u30ec\u30d9\u30eb\u3067\u5b9a\u7fa9\u3057\u305f\u5236\u7d04\u3092\u5217\u30ec\u30d9\u30eb\u5236\u7d04\u3001\u8868\u30ec\u30d9\u30eb\u3067\u5b9a\u7fa9\u3057\u305f\u5236\u7d04\u3092\u8868\u30ec\u30d9\u30eb\u5236\u7d04\u3068\u547c\u3076\u3002<br>\u4f5c\u6210\u3055\u308c\u305f\u5236\u7d04\u306e\u6a5f\u80fd\u306f\u540c\u3058\u3067\u3042\u308b\u3002<\/p>\n\n\n\n<p>\u5236\u7d04\u3092\u5b9a\u7fa9\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9<br>\u30fbCONSTRAINT \u5236\u7d04\u540d\u306f\u3001\u7701\u7565\u53ef\u80fd\u3002\u7701\u7565\u6642\u306f\u3001Oracle\u30b5\u30fc\u30d0\u304b\u3089SYS_Cn\u306e\u5f62\u5f0f\u3067\u540d\u524d\u3092\u4f5c\u6210\u3059\u308b\u3002<br>\u30fb\u8868\u30ec\u30d9\u30eb\u5236\u7d04\u306e\u69cb\u6587\u3067\u306f\u3001\uff08\uff09\u4e38\u62ec\u5f27\u5185\u306b\u5236\u7d04\u3092\u5b9a\u7fa9\u3059\u308b\u5217\u30921\u3064\u4ee5\u4e0a\u6307\u5b9a\u3059\u308b\u3002<br>\u30fb\uff11\u3064\u306eCREATE TABLE\u6587\u306e\u4e2d\u306b\u5217\u30ec\u30d9\u30eb\u5236\u7d04\u3068\u8868\u30ec\u30d9\u30eb\u5236\u7d04\u3092\u540c\u6642\u306b\u6307\u5b9a\u3067\u304d\u308b\u3002<br>\u30fbNOT NULL\u5236\u7d04\u306f\u3001\u5217\u30ec\u30d9\u30eb\u3067\u306e\u307f\u5b9a\u7fa9\u3067\u304d\u308b\u3002<br>\u30fb\u8907\u6570\u306e\u5217\u306e\u7d44\u307f\u5408\u308f\u305b\u304b\u3089\u306a\u308b\u5834\u5408\u306e\u5236\u7d04\u306f\u3001\u8868\u30ec\u30d9\u30eb\u3067\u306e\u307f\u5b9a\u7fa9\u3067\u304d\u308b\u3002<br>\u30fb\uff11\u3064\u306e\u5217\u306b\u8907\u6570\u306e\u5217\u30ec\u30d9\u30eb\u5236\u7d04\u3092\u5b9a\u7fa9\u3059\u308b\u5834\u5408\u306f\u3001\u6539\u884c\u307e\u305f\u306f\u30b9\u30da\u30fc\u30b9\u3067\u533a\u5207\u308b\uff08\u30ab\u30f3\u30de\u3067\u306f\u306a\u3044\uff09<br>\u30fb1\u3064\u306e\u8868\u306b\u8907\u6570\u306e\u8868\u30ec\u30d9\u30eb\u5236\u7d04\u3092\u5b9a\u7fa9\u3059\u308b\u5834\u5408\u306f\u3001,\u30ab\u30f3\u30de\u3067\u533a\u5207\u308b\uff08\u6539\u884c\u3084\u30b9\u30da\u30fc\u30b9\u3067\u306f\u306a\u3044\uff09<\/p>\n\n\n\n<p>\u25a0\u8868\u4f5c\u6210\u6642\u306e\u5236\u7d04\u306e\u5b9a\u7fa9\u69cb\u6587<\/p>\n\n\n\n<p>\u25a0\u5217\u30ec\u30d9\u30eb\u5236\u7d04\u306e\u57fa\u672c\u69cb\u6587<br>CONSTRAINT \u5236\u7d04\u540d \u5236\u7d04\u306e\u7a2e\u985e<\/p>\n\n\n\n<p>\u5236\u7d04\u3092\u5b9a\u7fa9\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9<br>CONSTRAINT \u5236\u7d04\u540d\u306f\u3001\u7701\u7565\u53ef\u80fd\uff08\u7701\u7565\u6642\u306f\u3001Oracle\u30b5\u30fc\u30d0\u304cSYS_Cn\u306e\u5f62\u5f0f\u3067\u540d\u524d\u3092\u4f5c\u6210\u3059\u308b\uff09<br>\u8868\u30ec\u30d9\u30eb\u5236\u7d04\u306e\u69cb\u6587\u3067\u306f\u3001\uff08\uff09\u4e38\u62ec\u5f27\u5185\u306b\u5236\u7d04\u3092\u5b9a\u7fa9\u3059\u308b\u5217\u30921\u3064\u4ee5\u4e0a\u6307\u5b9a\u3059\u308b\u3002<br>\uff11\u3064\u306eCREATE TABLE\u6587\u306e\u4e2d\u306b\u5217\u30ec\u30d9\u30eb\u5236\u7d04\u3068\u8868\u30ec\u30d9\u30eb\u5236\u7d04\u3092\u540c\u6642\u306b\u6307\u5b9a\u3067\u304d\u308b\u3002<br>NOT NULL\u5236\u7d04\u306f\u3001\u5217\u30ec\u30d9\u30eb\u3067\u306e\u307f\u5b9a\u7fa9\u53ef\u80fd\u3002<br>\u8907\u6570\u306e\u5217\u306e\u7d44\u5408\u305b\u304b\u3089\u306a\u308b\u5834\u5408\u306e\u5236\u7d04\u306f\u3001\u8868\u30ec\u30d9\u30eb\u3067\u306e\u307f\u5b9a\u7fa9\u3067\u304d\u308b\u3002<br>1\u3064\u306e\u5217\u306b\u8907\u6570\u306e\u5217\u30ec\u30d9\u30eb\u5236\u7d04\u3092\u5b9a\u7fa9\u3059\u308b\u5834\u5408\u306f\u3001\u6539\u884c\u307e\u305f\u306f\u30b9\u30da\u30fc\u30b9\u3067\u533a\u5207\u308b\uff08\u30ab\u30f3\u30de\u3067\u306f\u306a\u3044\uff09<br>1\u3064\u306e\u8868\u306b\u8907\u6570\u306e\u8868\u30ec\u30d9\u30eb\u5236\u7d04\u3092\u5b9a\u7fa9\u3059\u308b\u5834\u5408\u306f\u3001\u30ab\u30f3\u30de\u3067\u533a\u5207\u308b\uff08\u6539\u884c\u3084\u30b9\u30da\u30fc\u30b9\u3067\u306f\u306a\u3044\uff09<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"818\" height=\"156\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_1_SQL_12C.png\" alt=\"\" class=\"wp-image-994\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_1_SQL_12C.png 818w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_1_SQL_12C-300x57.png 300w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_1_SQL_12C-768x146.png 768w\" sizes=\"auto, (max-width: 818px) 100vw, 818px\" \/><\/figure>\n\n\n\n<p>\u25a0PRIMARY KEY \u5236\u7d04\uff08\u4e3b\u30ad\u30fc\u5236\u7d04\uff09<\/p>\n\n\n\n<p>PRIMARY KEY\u5236\u7d04\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u3001\u305d\u306e\u5217\u306b\u306f\u3001\u8868\u5185\u306e\u5404\u884c\u3092\u4e00\u610f\u306b\u8b58\u5225\u3067\u304d\u308b\u5024\u3057\u304b\u683c\u7d0d\u3067\u304d\u306a\u304f\u306a\u308b\u3002<br>\u91cd\u8907\u5024\u3084NULL\u5024\u3092\u683c\u7d0d\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u3002<\/p>\n\n\n\n<p>NOT NULL PRIMARY KEY \u3068\u3044\u3046\uff12\u3064\u306e\u5236\u7d04\u3092\u5b9a\u7fa9\u3067\u304d\u308b\u3068\u554f\u984c\u96c6\u306e\u7b2c11\u7ae026\u306f\u3001\u89e3\u8aac\u3057\u3066\u3044\u308b\u304c\u306b\u308f\u304b\u306b\u306f\u4fe1\u3058\u304c\u305f\u3044\u3002<br>\u4f8b\uff09<br>\u25bc\u5217\u30ec\u30d9\u30eb\u306e\u5236\u7d04\u5b9a\u7fa9<br>CREATE TABLE EMP<br>(ENAME VARCHAR2(10) NOT NULL PRIMARY KEY);<\/p>\n\n\n\n<p>\u25bc\u8868\u30ec\u30d9\u30eb\u306e\u5236\u7d04\u5b9a\u7fa9\u306e\u305f\u3081\u3001\u30a8\u30e9\u30fc<br>CREATE TABLE EMP<br>(ENAME VARCHAR2(10) PRIMARY KEY, NOT NULL(ENAME));<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"209\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_2_SQL_12C.png\" alt=\"\" class=\"wp-image-995\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_2_SQL_12C.png 620w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_2_SQL_12C-300x101.png 300w\" sizes=\"auto, (max-width: 620px) 100vw, 620px\" \/><\/figure>\n\n\n\n<p>FOREIGN KEY\u5236\u7d04\uff08\u5916\u90e8\u30ad\u30fc\u5236\u7d04\uff09\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u3001\u305d\u306e\u5217\u306b\u306f\u3001\u53c2\u7167\u5148\u306e\u5217\u306b\u5b58\u5728\u3059\u308b\u5024\u3057\u304b\u683c\u7d0d\u3067\u304d\u306a\u3044\u3002<br>FOREIGN KEY\u5236\u7d04\uff08\u5916\u90e8\u30ad\u30fc\u5236\u7d04\uff09\u3092\u5b9a\u7fa9\u3057\u3066\u3082\u3001NULL\u5024\u3092\u542b\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<br>FOREIGN KEY\u5236\u7d04\u306f\u3001UNIQUE\u5236\u7d04\u307e\u305f\u306f\u3001PRIMARY KEY\u5236\u7d04\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u5217\u3057\u304b\u53c2\u7167\u3067\u304d\u306a\u3044\u3002<br>FOREIGN KEY\u5236\u7d04\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u3001\u89aa\u8868\u306f\u524a\u9664\u3067\u304d\u306a\u3044\u3002<\/p>\n\n\n\n<p>\u25a0CHECK\u5236\u7d04<br>\u6761\u4ef6\u306b\u5bfe\u3057\u3066\u3001TRUE\u307e\u305f\u306f\u3001NULL\u3092\u623b\u3059\u5024\u3057\u304b\u683c\u7d0d\u3067\u304d\u306a\u3044\u3002<\/p>\n\n\n\n<p>\u25bc\u8a31\u53ef\u3055\u308c\u3066\u3044\u306a\u3044\u4e8b\u9805<br>CURRVAL\u3001NEXTVAL\u3001LEVEL\u3001ROUNUM\u7591\u4f3c\u5217\u306e\u53c2\u7167<br>SYSDATE\u3001UID\u3001USER\u3001USERENV\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057<br>\u4ed6\u306e\u884c\u306e\u5024\u3092\u53c2\u7167\u3059\u308b\u554f\u5408\u305b<\/p>\n\n\n\n<p>\u25a0\u5217\u306e\u524a\u9664<br>ALTER TABLE \u8868\u540d DROP (\u5217\u540d [, \u5217\u540d]);<\/p>\n\n\n\n<p>\u25bc\u5217\u3092\u524a\u9664\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9<br>\u524a\u9664\u306e\u5bfe\u8c61\u306e\u5217\u306b\u306f\u3001\u30c7\u30fc\u30bf\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u3082\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u3082\u3042\u308b\u3002<br>\u5217\u3092\u524a\u9664\u3057\u305f\u5f8c\u3082\u3001\u8868\u306b\u306f1\u3064\u4ee5\u4e0a\u306e\u5217\u3092\u6b8b\u3059\u5fc5\u8981\u304c\u3042\u308b\u3002<br>\u5217\u306e\u524a\u9664\u306f\u3001\u5143\u306b\u623b\u305b\u306a\u3044\u3002<br>\u5225\u306e\u5217\u304b\u3089\u53c2\u7167\u3055\u308c\u308b\u4e3b\u30ad\u30fc\u306f\u3001CASCADE\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3057\u306a\u3044\u9650\u308a\u3001\u524a\u9664\u3067\u304d\u306a\u3044\u3002<br>\u5217\u306b\u591a\u304f\u306e\u5024\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u524a\u9664\u306b\u6642\u9593\u304c\u304b\u304b\u308b\u3002<\/p>\n\n\n\n<p>\uff11\u5ea6\u306b\uff11\u3064\u306e\u5217\u306e\u307f\u3092\u524a\u9664\u3059\u308b\u5834\u5408\u306f\u3001<br>ALTER TABLE DROP COLUMN\u6587\u3092\u4f7f\u7528\u3067\u304d\u308b\u3002<\/p>\n\n\n\n<p>UNUSED\u30de\u30fc\u30af\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u5217\u306f\u3001\u524a\u9664\u3055\u308c\u305f\u5217\u3068\u540c\u7b49\u306e\u6271\u3044\u306b\u306a\u308b\u305f\u3081\u3001\u540c\u3058\u540d\u524d\u306e\u5217\u3092\u4f5c\u6210\u3067\u304d\u308b\u3002<\/p>\n\n\n\n<p>ALTER TABLE \u8868\u540d<br>SET UNUSED(\u5217\u540d);<\/p>\n\n\n\n<p>ALTER TABLE \u8868\u540d<br>SET UNUSED COLUMN(\u5217\u540d);<\/p>\n\n\n\n<p>ALTER TABLE \u8868\u540d DROP UNUSED COLUMNS;<\/p>\n\n\n\n<p>ALTER TBALE SET UNUSED<br>UNUSED\u30de\u30fc\u30af\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u5217\u306f\u3001\u524a\u9664\u3055\u308c\u305f\u5217\u3068\u540c\u7b49\u306e\u6271\u3044\u306b\u306a\u308b\u305f\u3081\u3001\u540c\u3058\u540d\u524d\u306e\u5217\u3092\u4f5c\u6210\u3067\u304d\u308b\u3002<br>UNUSED\u30de\u30fc\u30af\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u5217\u306e\u540d\u524d\u306e\u78ba\u8a8d\u3084\u3001\u53d6\u6d88\u306f\u884c\u3048\u306a\u3044\u3002<br>\u5217\u306e\u5217\u6570\u3060\u3051\u306f\u3001USER_UNUSED_COL_TABS\u30c7\u30fc\u30bf\u30c7\u30a3\u30af\u30b7\u30e7\u30ca\u30ea\u3067\u78ba\u8a8d\u304c\u3067\u304d\u308b\u3002<br>UNUSED\u30de\u30fc\u30af\u304c\u4ed8\u3051\u305f\u5217\u306b\u7d22\u5f15\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u7d22\u5f15\u306f\u524a\u9664\u3055\u308c\u3001\u5236\u7d04\u3082\u524a\u9664\u3055\u308c\u308b\u3002<\/p>\n\n\n\n<p>\u901a\u5e38\u306e\u5217\u306fUNUSED\u30de\u30fc\u30af\u3092\u4ed8\u3051\u308b\u3068\u3001\u3059\u3050\u306b\u540c\u3058\u540d\u524d\u306e\u5217\u3092\u8ffd\u52a0\u3067\u304d\u308b\u3002<br>LONG\u578b\u306e\u5217\u306f\u3001\u4f8b\u5916\u3067\u3001\u672a\u4f7f\u7528\u306eLONG\u5217\u3092\u7269\u7406\u7684\u306b\u524a\u9664\u3057\u306a\u3044\u9650\u308a\u3001\u305d\u306e\u8868\u306b\u5225\u306eLONG\u5217\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u3002<br>\u30d3\u30e5\u30fc\u306f\u81ea\u52d5\u7684\u306b\u4fee\u6b63\u3055\u308c\u306a\u3044\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"588\" height=\"573\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_3_SQL_12C.png\" alt=\"\" class=\"wp-image-996\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_3_SQL_12C.png 588w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_3_SQL_12C-300x292.png 300w\" sizes=\"auto, (max-width: 588px) 100vw, 588px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"580\" height=\"269\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_4_SQL_12C.png\" alt=\"\" class=\"wp-image-997\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_4_SQL_12C.png 580w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_4_SQL_12C-300x139.png 300w\" sizes=\"auto, (max-width: 580px) 100vw, 580px\" \/><\/figure>\n\n\n\n<p>\u8868\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u3082\u306e\u306f\uff12\u3064<br>\uff11\uff0eCREATE TABLE\u30b7\u30b9\u30c6\u30e0\u6a29\u9650<br>\u3000\u3000\u3000\u307e\u305f\u3001CREATE ANY TABLE\u30b7\u30b9\u30c6\u30e0\u6a29\u9650\u3092\u6301\u3063\u3066\u3044\u308c\u3070\u3001\u4ed6\u306e\u30b9\u30ad\u30fc\u30de\u306b\u8868\uff08\u4ed6\u30e6\u30fc\u30b6\u304c\u6240\u6709\u3059\u308b\u8868\uff09\u3092\u4f5c\u6210\u3067\u304d\u308b\u3002<br>\uff12\uff0e\u8a18\u61b6\u57df \u8868\u3092\u683c\u7d0d\u3059\u308b\u8a18\u61b6\u57df\u304c\u5fc5\u8981\u3002<\/p>\n\n\n\n<p>\u9806\u756a\u3068\u306f\u3001\u4e00\u610f\u306a\u756a\u53f7\u3092\u751f\u6210\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u3053\u3068\u3002<\/p>\n\n\n\n<p>\u30b7\u30ce\u30cb\u30e0\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3059\u308b\u5225\u540d\u306e\u3053\u3068\u3067\u3001CREATE SYNONYM\u6587\u3067\u5225\u540d\u3092\u5b9a\u7fa9\u3067\u304d\u308b\u3002<br>CREATE TABLE\u6587\u3067\u306f\u3001\u30b9\u30ad\u30fc\u30de\u3001\u5225\u306e\u30c7\u30fc\u30bf\u578b\u304a\u3088\u3073\u5236\u7d04\u306a\u3069\u3092\u6307\u5b9a\u3059\u308b\u3002<\/p>\n\n\n\n<p>\u30b9\u30ad\u30fc\u30de\u3068\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6240\u6709\u8005\u3092\u8868\u3059\u6982\u5ff5\u3067\u3042\u308b\u3002\u5177\u4f53\u7684\u306b\u306f\u30e6\u30fc\u30b6\u304c\u6240\u6709\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u96c6\u5408\uff08\u30ea\u30b9\u30c8\uff09\u3092\u8868\u3059\u3002<br>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30e6\u30fc\u30b6\u306b\u306f\u3001\u5fc5\u305a\uff11\u3064\u306e\u30b9\u30ad\u30fc\u30de\u3092\u6301\u3061\u3001\u30b9\u30ad\u30fc\u30de\u540d\u306b\u306f\u3001\u30e6\u30fc\u30b6\u540d\u304c\u4f7f\u308f\u308c\u308b\u3002<\/p>\n\n\n\n<p>SQL Developer\u304a\u3088\u3073SQL * Plus\u306b\u304a\u3044\u3066\u3001DESCRIBE\u30b3\u30de\u30f3\u30c9\uff08\u77ed\u7e2e\u5f62\uff1aDESC\u30b3\u30de\u30f3\u30c9\uff09\u3092\u4f7f\u3063\u3066\u3001\u8868\u306e\u69cb\u9020\u3092\u53c2\u7167\u3067\u304d\u308b\u3002<br>LIST\u30b3\u30de\u30f3\u30c9\u3001SHOW\u30b3\u30de\u30f3\u30c9\u306f\u3001SQL * Plus\u306e\u30b3\u30de\u30f3\u30c9\u3067\u3042\u308b\u3002<br>LIST\u30b3\u30de\u30f3\u30c9\uff08\u77ed\u7e2e\u5f62\uff1aL\u30b3\u30de\u30f3\u30c9\uff09\u306f\u3001SQL\u30d0\u30c3\u30d5\u30a1\u5185\u306eSQL\u6587\u3092\u8868\u793a\u3059\u308b\u3002<br>SHOW\u30b3\u30de\u30f3\u30c9\uff08\u77ed\u7e2e\u5f62\uff1aSHO\u30b3\u30de\u30f3\u30c9\uff09\u306f\u3001SQL * Plus\u306e\u5b9f\u884c\u74b0\u5883\uff08\u30b7\u30b9\u30c6\u30e0\u5909\u6570\uff09\u3092\u8868\u793a\u3059\u308b\u3002<\/p>\n\n\n\n<p>VARCHAR2(n)\u306en\u306f\u3001\u6700\u5927\u9577\u3092\u8868\u3057\u3001n\u3092\u8d85\u3048\u308b\u30c7\u30fc\u30bf\u306f\u30a8\u30e9\u30fc\u3068\u6210\u308b\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"568\" height=\"355\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_5_SQL_12C.png\" alt=\"\" class=\"wp-image-999\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_5_SQL_12C.png 568w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_5_SQL_12C-300x188.png 300w\" sizes=\"auto, (max-width: 568px) 100vw, 568px\" \/><\/figure>\n\n\n\n<p>CHAR\u578b<br>CHAR(n)<br>n\u3092\u8d85\u3048\u308b\u30c7\u30fc\u30bf\u306f\u30a8\u30e9\u30fc\u3068\u306a\u308a\u3001n\u306b\u6e80\u305f\u306a\u3044\u30c7\u30fc\u30bf\u306f\u3001\u5f8c\u308d\u306b\u7a7a\u767d\u3092\u8ffd\u52a0\u3057\u3066\u3001n\u307e\u3067\u62e1\u5f35\u3055\u308c\u308b\u3002<br>n\u306f\u7701\u7565\u53ef\u80fd\u3067\u3042\u308b\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u306f1<\/p>\n\n\n\n<p>NUMBER\u578b<br>NUMBER(p,s) p\u306f10\u9032\u6570\u6841\u306e\u7dcf\u6570\u3092\u8868\u3057\u3001\u7bc4\u56f2\u306f\uff11\uff5e\uff13\uff18\u6841\u306b\u306a\u308b\u3002<br>s\u306f\u3001\u4f4d\u53d6\u308a\uff08\u5c0f\u6570\u70b9\u4ee5\u4e0b\u306e\u6841\u6570\uff09\u3067\u3042\u308a\u3001s\u306e\u7bc4\u56f2\u306f\u3001-84\uff5e127\u6841\u3067\u3042\u308b\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"631\" height=\"187\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_6_SQL_12C.png\" alt=\"\" class=\"wp-image-1000\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_6_SQL_12C.png 631w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_6_SQL_12C-300x89.png 300w\" sizes=\"auto, (max-width: 631px) 100vw, 631px\" \/><\/figure>\n\n\n\n<p>NUMBER(p,s)\u3067\u3001\u5024\u304c\u7cbe\u5ea6\u306e\u6709\u52b9\u7bc4\u56f2\u3092\u8d85\u3048\u308b\uff08\u6574\u6570\u90e8\u306e\u6841\u304c\u4e0d\u8db3\u3059\u308b\uff09\u3068\u30a8\u30e9\u30fc\u3068\u306a\u308b\u3002<br>\u5024\u304c\u4f4d\u53d6\u308a\u306e\u6709\u52b9\u7bc4\u56f2\u3092\u8d85\u3048\u308b\uff08\u5c0f\u6570\u90e8\u306e\u6841\u304c\u4e0d\u8db3\u3059\u308b\uff09\u3068\u4e38\u3081\u3089\u308c\u308b\u3002<\/p>\n\n\n\n<p>DATE\u578b<br>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u306f\u3001\u56fa\u5b9a\u9577\u3067\u683c\u7d0d\u3055\u308c\u308b\u3002<br>\u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u3001 DD-MON-RR<br>DD-MON-YY 2005\u5e74\u306b01-JAN-99\u3068\u5165\u529b\u3059\u308b\u306801-JAN-2099\u3068\u89e3\u91c8\u3055\u308c\u308b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"565\" height=\"122\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_7_SQL_12C.png\" alt=\"\" class=\"wp-image-1002\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_7_SQL_12C.png 565w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_7_SQL_12C-300x65.png 300w\" sizes=\"auto, (max-width: 565px) 100vw, 565px\" \/><\/figure>\n\n\n\n<p>\u3042\u308b\u65e5\u4ed8\u304b\u3089\u5225\u306e\u65e5\u4ed8\u3092\u5f15\u304f\u3068\u65e5\u6570\u3092\u8868\u3059\u6570\u5024\u304c\u623b\u308b\u3002\u65e5\u4ed8\u3067\u306f\u306a\u304f\u65e5\u6570\u3092\u8868\u3059\u6570\u5024\u3068\u306a\u308b\u3002<\/p>\n\n\n\n<p>\u25bc\u5236\u7d04\u306b\u95a2\u3059\u308b<br>\u8868\u306b\u7121\u52b9\u306a\u30c7\u30fc\u30bf\u304c\u5165\u529b\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3002<br>\u5024\u3092\u4f7f\u3063\u305f\u95a2\u9023\u4ed8\u3051\u3092\u77db\u76fe\u304c\u306a\u3044\u3088\u3046\u306b\u7dad\u6301\u3059\u308b\u3002\uff08\u8868\u306e\u524a\u9664\u3084\u66f4\u65b0\u3092\u9632\u6b62\uff09<br>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3054\u3068\u306b\u5236\u7d04\u3092\u8a18\u8ff0\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044\u305f\u3081\u3001\u751f\u7523\u6027\u304c\u5411\u4e0a\u3059\u308b\u3002<br>\u5236\u7d04\u306f\u3001\u30c1\u30a7\u30c3\u30af\u306e\u305f\u3081\u306b\u6642\u9593\u304c\u4f59\u8a08\u306b\u304b\u304b\u308a\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"624\" height=\"668\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_8_SQL_12C.png\" alt=\"\" class=\"wp-image-1004\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_8_SQL_12C.png 624w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_8_SQL_12C-280x300.png 280w\" sizes=\"auto, (max-width: 624px) 100vw, 624px\" \/><\/figure>\n\n\n\n<p>\u25bc\u5217\u30ec\u30d9\u30eb\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9<br>\u5217\u5b9a\u7fa9\u306e\u4e2d\u3067\u5236\u7d04\u3092\u6307\u5b9a\u3057\u3001\u305d\u306e\u5217\u306b\u5bfe\u3059\u308b\u5236\u7d04\u306e\u307f\u3092\u5b9a\u7fa9\u3059\u308b\u3002\u4ed6\u306e\u5217\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u5236\u7d04\uff08\u8907\u5408\u4e3b\u30ad\u30fc\u306a\u3069\uff09\u306f\u6307\u5b9a\u3067\u304d\u306a\u3044\u3002<br>NOT NULL\u5236\u7d04\u306f\u3001\u5217\u30ec\u30d9\u30eb\u69cb\u6587\u3067\u306e\u307f\u6307\u5b9a\u3067\u304d\u308b\u3002\u4ed6\u306e\u5236\u7d04\u306f\u3001\u8868\u30ec\u30d9\u30eb\u304a\u3088\u3073\u5217\u30ec\u30d9\u30eb\u306e\u3069\u3061\u3089\u3067\u3082\u6307\u5b9a\u3067\u304d\u308b\u3002<\/p>\n\n\n\n<p>\u25bc\u8868\u30ec\u30d9\u30eb\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9<br>\u5217\u5b9a\u7fa9\u3068\u306f\u5225\u306b\u3001\u5236\u7d04\u3060\u3051\u3092\u5358\u72ec\u3067\u6307\u5b9a\u3059\u308b\u3002\u5236\u7d04\u306e\u5b9a\u7fa9\u4e2d\u306b\u5217\u3092\u542b\u3080\u3002\u4ed6\u306e\u5217\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u306e\u5236\u7d04\uff08\u8907\u5408\u4e3b\u30ad\u30fc\u306a\u3069\uff09\u3092\u6307\u5b9a\u3067\u304d\u308b\u3002<br>NOT NULL\u5236\u7d04\u306f\u3001\u6307\u5b9a\u3067\u304d\u306a\u3044\u3002<br>ALTER TABLE\u6587\u3067\u5236\u7d04\u3060\u3051\u3092\u5358\u72ec\u3067\u8ffd\u52a0\u3059\u308b\u5834\u5408\u306f\u3001\u8868\u30ec\u30d9\u30eb\u69cb\u6587\u3092\u4f7f\u3046\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"615\" height=\"206\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_9_SQL_12C.png\" alt=\"\" class=\"wp-image-1005\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_9_SQL_12C.png 615w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_9_SQL_12C-300x100.png 300w\" sizes=\"auto, (max-width: 615px) 100vw, 615px\" \/><\/figure>\n\n\n\n<p>Oracle\u30b5\u30fc\u30d0\u306f\u3001\u6697\u9ed9\u7684\u306b\u4e00\u610f\u306a\u7d22\u5f15\u3092\u4f5c\u6210\u3057\u3001UNIQUE\u5236\u7d04\u3092\u9069\u7528\u3059\u308b\u3002<br>\u8907\u5408\u4e00\u610f\u30ad\u30fc\uff08\u5217\u306e\u7d44\u5408\u305b\u3067\u4e00\u610f\u3067\u3042\u308b\uff09\u306f\u3001\u8868\u30ec\u30d9\u30eb\u306e\u69cb\u6587\u3067\u6307\u5b9a\u3059\u308b\u3002<br>CONSTRAINT \u5236\u7d04\u540d\u3000UNIQUE(\u5217\u540d1,\u5217\u540d2)<\/p>\n\n\n\n<p>\u8907\u5408\u4e00\u610f\u30ad\u30fc\u306f\u3001\u7d44\u5408\u305b\u305f\u5217\u3067NULL\u5024\u3092\u9664\u304d\u3001\u4e00\u610f\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n\n\n<p>\u8868\u4e00\u3064\u306b\u5bfe\u3057\u3066\u3001\u4e3b\u30ad\u30fc\u306f\u3001\u5fc5\u305a\u4e00\u3064\u8a2d\u5b9a\u3059\u308b\u5fc5\u8981\u306f\u306a\u3044\u3002<\/p>\n\n\n\n<p>PRIMARY KEY\u5236\u7d04\u3067\u306f\u3001\u8907\u5408\u30ad\u30fc\u3092\u6307\u5b9a\u3067\u304d\u308b\u306e\u306f\u3001\u8868\u30ec\u30d9\u30eb\u69cb\u6587\u3060\u3051\u3067\u3042\u308b\u3002<br>\u5217\u30ec\u30d9\u30eb<br>CREATE TABLE EMP (EMPNO NUMBER(6) PRIMARY KEY);<\/p>\n\n\n\n<p>\u8868\u30ec\u30d9\u30eb<br>CREATE TABLE EMP(EMPNO NUMBER(6),<br>CONSTRAINT EMP_ENAME_UQ PRIMARY KEY(EMPNO));<\/p>\n\n\n\n<p>FOREIGN KEY\u5236\u7d04\u306f\u3001\u53c2\u7167\u6574\u5408\u6027\u5236\u7d04\u307e\u305f\u306f\u3001\u53c2\u7167\u5236\u7d04\u3068\u3082\u547c\u3070\u308c\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<p>\u53c2\u7167\u3059\u308b\u5217\u306f\u3001\u5916\u90e8\u30ad\u30fc\u3001\u53c2\u7167\u3055\u308c\u308b\u5217\u306f\u3001\u89aa\u30ad\u30fc\u3068\u547c\u3076\u3002<br>\u5916\u90e8\u30ad\u30fc\u306e\u5024\u306fNULL\u3067\u3042\u308b\u304b\u3001\u3042\u308b\u3044\u306f\u89aa\u30ad\u30fc\u306e\u5024\u306e\u3044\u305a\u308c\u304b\u306b\u4e00\u81f4\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<br>\u5916\u90e8\u30ad\u30fc\u304c\u53c2\u7167\u3057\u3066\u3044\u308b\u89aa\u30ad\u30fc\u306e\u5024\u306f\u524a\u9664\u3067\u304d\u306a\u3044\u3002\uff08\u305f\u3060\u3057\u3001ON DELETE CASCADE\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u524a\u9664\u53ef\u80fd\uff09<br>\u5916\u90e8\u30ad\u30fc\u3092\u5b9a\u7fa9\u3059\u308b\u524d\u306b\u3001\u89aa\u30ad\u30fc\u306b\u306fPRIMARY KEY\u5236\u7d04\u307e\u305f\u306f\u3001UNIQUE\u5236\u7d04\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<br>\u81ea\u8868\u306f\u3001\u89aa\u8868\u306b\u3067\u304d\u306a\u3044\u3002<br>FOREIGN KEY\u5236\u7d04\u3092\u8a2d\u5b9a\u3057\u305f\u5f8c\u3001\u89aa\u8868\u306e\u4e3b\u30ad\u30fc\u3092\u5909\u66f4\u3067\u304d\u306a\u3044\u3002<\/p>\n\n\n\n<p>\u25a0\u526f\u554f\u5408\u305b\u3092\u4f7f\u3044\u3001\u65e2\u5b58\u306e\u8868\u304b\u3089\u65b0\u3057\u3044\u8868\u3092\u4f5c\u6210\u3067\u304d\u308b\u3002<br>CREATE TABLE \u8868\u540d [\u5217\u540d1,\u5217\u540d2,\u30fb\u30fb\u30fb]<br>AS \u526f\u554f\u5408\u305b;<\/p>\n\n\n\n<p>\u25bc\u526f\u554f\u5408\u305b\u3092\u4f7f\u3063\u305f\u8868\u4f5c\u6210\u306e\u30dd\u30a4\u30f3\u30c8<br>\u6307\u5b9a\u3059\u308b\u5217\u6570\u3068\u526f\u554f\u5408\u305b\u306e\u5217\u6570\u306f\u3001\u4e00\u81f4\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<br>\u5217\u540d\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3001\u5236\u7d04\u3092\u6307\u5b9a\u3067\u304d\u308b<br>SELECT\u53e5\u3067\u5f0f\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u306f\u3001\u5217\u540d\u307e\u305f\u306f\u5f0f\u306b\u5217\u5225\u540d\u3092\u6307\u5b9a\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<br>\u30c7\u30fc\u30bf\u578b\u3001NOT NULL\u5236\u7d04\u3001\u30c7\u30fc\u30bf\u304c\u8868\u306b\u30b3\u30d4\u30fc\u3055\u308c\u308b\u3002\u307e\u305f\u3001\u5217\u540d\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u306f\u3001\u526f\u554f\u5408\u305b\u306e\u5217\u540d\u304c\u30b3\u30d4\u30fc\u3055\u308c\u308b\u3002<\/p>\n\n\n\n<p>\u30c7\u30fc\u30bf\u578b\u3068NOT NULL\u5236\u7d04\u306f\u3001\u65b0\u3057\u3044\u8868\u306b\u30b3\u30d4\u30fc\u3055\u308c\u308b\u3002<br>NOT NULL\u5236\u7d04\u4ee5\u5916\u306e\u5236\u7d04\u306f\u30b3\u30d4\u30fc\u3055\u308c\u306a\u3044\u3002<br>\u526f\u554f\u5408\u305b\u306eSELECT\u53e5\u3067\u8a08\u7b97\u5f0f\u3084\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u660e\u793a\u7684\u306b\u5217\u540d\uff08\u5217\u5225\u540d\uff09\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n\n\n<p>\u25a0ALTER TABLE<br>ALTER TABLE\u6587\u3067\u306f\u3001\u5217\u306e\u8ffd\u52a0\u3001\u5b9a\u7fa9\u306e\u5909\u66f4\u3001\u5217\u306e\u524a\u9664\u3001\u5217\u306e\u540d\u524d\u306e\u5909\u66f4\u3001\u8aad\u307f\u53d6\u308a\u5c02\u7528\u72b6\u614b\u3078\u306e\u8868\u306e\u5909\u66f4\u304c\u884c\u3048\u308b\u3002<br>\u5217\u306e\u8ffd\u52a0\u3001\u5217\u5b9a\u7fa9\u306e\u5909\u66f4\u6642\u306b\u5217\u306e\u3067Default\u5024\u306e\u8ffd\u52a0\u3001\u5909\u66f4\u3082\u3067\u304d\u308b\u3002<br>\u8868\u306e\u5207\u6368\u3066\u306b\u306f\u3001TRUNCATE\u6587\u3092\u7528\u3044\u308b\u3002<\/p>\n\n\n\n<p>ALTER TABLE\u6587\u3092\u4f7f\u3044\u3001\u8868\u3092\u8aad\u53d6\u308a\u5c02\u7528\u72b6\u614b\u306b\u5909\u66f4\u3067\u304d\u308b\u3002<br>ALER TABLE \u8868\u540d READ ONLY | READ WRITH;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"432\" height=\"171\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_10_SQL_12C.png\" alt=\"\" class=\"wp-image-1006\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_10_SQL_12C.png 432w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_10_SQL_12C-300x119.png 300w\" sizes=\"auto, (max-width: 432px) 100vw, 432px\" \/><\/figure>\n\n\n\n<p>\u8aad\u53d6\u308a\u5c02\u7528\u72b6\u614b\u306e\u8868\u306b\u5bfe\u3057\u3066\u3001INSERT\u6587\u3001DELETE\u6587\u3001UPDATE\u6587\u3001SELECT \uff5e FOR UPDATE\u6587\u3092\u767a\u884c\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u3002<br>\u8868\u5185\u306e\u30c7\u30fc\u30bf\u3092\u5909\u66f4\u3059\u308bDDLB\u3093\uff08TRANCATE\u6587\uff09\u306a\u3069\u3082\u767a\u884c\u3067\u304d\u306a\u3044\u3002<br>\u305f\u3060\u3057\u3001DROP TABLE\u6587\u3092\u767a\u884c\u3057\u3066\u3001\u8868\u3092\u524a\u9664\u3059\u308b\u3053\u3068\u306f\u53ef\u80fd\u3067\u3042\u308b\u3002<\/p>\n\n\n\n<p>\u25bcDROP TABLE\u6587\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3<br>\u8868\u304a\u3088\u3073\u8868\u306b\u4f5c\u6210\u3055\u308c\u305f\u7d22\u5f15\u3001\u5236\u7d04\u306f\u524a\u9664\u3055\u308c\u3001\u30b4\u30df\u7bb1\u306b\u79fb\u52d5\u3055\u308c\u3066\u4f7f\u7528\u3067\u304d\u306a\u304f\u306a\u308b\u304c\u3001<br>FLASHBACK 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ANY 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decoding=\"async\" width=\"559\" height=\"188\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_13_SQL_12C.png\" alt=\"\" class=\"wp-image-1009\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_13_SQL_12C.png 559w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_13_SQL_12C-300x101.png 300w\" sizes=\"auto, (max-width: 559px) 100vw, 559px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"565\" height=\"133\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_14_SQL_12C.png\" alt=\"\" class=\"wp-image-1010\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_14_SQL_12C.png 565w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_14_SQL_12C-300x71.png 300w\" sizes=\"auto, (max-width: 565px) 100vw, 565px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"584\" height=\"378\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_15_SQL_12C.png\" alt=\"\" class=\"wp-image-1011\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_15_SQL_12C.png 584w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_15_SQL_12C-300x194.png 300w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"565\" height=\"380\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_16_SQL_12C.png\" alt=\"\" class=\"wp-image-1012\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_16_SQL_12C.png 565w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_16_SQL_12C-300x202.png 300w\" sizes=\"auto, (max-width: 565px) 100vw, 565px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"564\" height=\"444\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_17_SQL_12C.png\" alt=\"\" class=\"wp-image-1013\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_17_SQL_12C.png 564w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_17_SQL_12C-300x236.png 300w\" sizes=\"auto, (max-width: 564px) 100vw, 564px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"579\" height=\"227\" src=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_18_SQL_12C.png\" alt=\"\" class=\"wp-image-1014\" srcset=\"https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_18_SQL_12C.png 579w, https:\/\/skyit.biz\/wp-content\/uploads\/2021\/01\/11_18_SQL_12C-300x118.png 300w\" sizes=\"auto, (max-width: 579px) 100vw, 579px\" 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[&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":999,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38,52,12],"tags":[],"class_list":{"0":"post-993","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-bronze-dba-12c","8":"category-bronze-sql-12c","9":"category-oracle"},"_links":{"self":[{"href":"https:\/\/skyit.biz\/index.php?rest_route=\/wp\/v2\/posts\/993","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/skyit.biz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/skyit.biz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/skyit.biz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/skyit.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=993"}],"version-history":[{"count":2,"href":"https:\/\/skyit.biz\/index.php?rest_route=\/wp\/v2\/posts\/993\/revisions"}],"predecessor-version":[{"id":1015,"href":"https:\/\/skyit.biz\/index.php?rest_route=\/wp\/v2\/posts\/993\/revisions\/1015"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/skyit.biz\/index.php?rest_route=\/wp\/v2\/media\/999"}],"wp:attachment":[{"href":"https:\/\/skyit.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/skyit.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/skyit.biz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}