{"id":971,"date":"2021-01-25T01:39:04","date_gmt":"2021-01-24T16:39:04","guid":{"rendered":"https:\/\/skyit.biz\/?p=971"},"modified":"2021-01-25T01:39:06","modified_gmt":"2021-01-24T16:39:06","slug":"%e7%ac%ac5%e7%ab%a0-%e3%80%80%e5%a4%89%e6%8f%9b%e9%96%a2%e6%95%b0%e3%83%bb%e6%b1%8e%e7%94%a8%e9%96%a2%e6%95%b0%e3%81%a8%e6%9d%a1%e4%bb%b6%e5%bc%8f%e3%81%ae%e6%8c%87%e5%ae%9a","status":"publish","type":"post","link":"https:\/\/skyit.biz\/?p=971","title":{"rendered":"\u7b2c5\u7ae0 \u3000\u5909\u63db\u95a2\u6570\u30fb\u6c4e\u7528\u95a2\u6570\u3068\u6761\u4ef6\u5f0f\u306e\u6307\u5b9a"},"content":{"rendered":"\n

5.1\u3000\u30c7\u30fc\u30bf\u578b\u306e\u5909\u63db\u3068\u5909\u63db\u95a2\u6570<\/p>\n\n\n\n

\u6697\u9ed9\u7684\u306a\u30c7\u30fc\u30bf\u578b\u5909\u63db
\u30fb\u6570\u5024\u304c\u6c42\u3081\u3089\u308c\u3066\u3044\u308b\u7b87\u6240\u306b\u3001\u6587\u5b57\u5024\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408
\u6587\u5b57\u5024\uff08CHAR\u578b\u30fbVARCHAR2\u578b\uff09\uff1e\uff1e\uff1e\u6570\u5024\uff08NUMBER\u578b\uff09\u306b\u5909\u63db\u3055\u308c\u308b\u3002<\/p>\n\n\n\n

\u30fb\u65e5\u4ed8\u5024\u304c\u6c42\u3081\u3089\u308c\u3066\u3044\u308b\u7b87\u6240\u306b\u3001\u6587\u5b57\u5024\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408
\u6587\u5b57\u5024\uff08CHAR\u578b\u30fbVARCHAR2\u578b\uff09\uff1e\uff1e\uff1e\u65e5\u4ed8\u5024\uff08DATE\u578b\uff09\u306b\u5909\u63db\u3055\u308c\u308b\u3002<\/p>\n\n\n\n

\u30fb\u6587\u5b57\u5024\u304c\u6c42\u3081\u3089\u3066\u3044\u308b\u7b87\u6240\u306b\u3001\u6570\u5024\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u3002
\u6570\u5024\uff08NUMBER\u578b\uff09\uff1e\uff1e\uff1e\u6587\u5b57\u5024\uff08CHAR\u578b\u30fbVARCHAR2\u578b\uff09\u306b\u5909\u63db\u3055\u308c\u308b<\/p>\n\n\n\n

\u30fb\u6587\u5b57\u5024\u304c\u6c42\u3081\u3089\u308c\u3066\u3044\u308b\u7b87\u6240\u306b\u3001\u65e5\u4ed8\u5024\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408
\u65e5\u4ed8\u5024\uff08DATE\u578b\uff09\uff1e\uff1e\uff1e\u6587\u5b57\u5024\uff08CHAR\u578b\u30fbVARCHAR2\u578b\uff09\u306b\u5909\u63db\u3055\u308c\u308b\u3002<\/p>\n\n\n\n

\u25a0TO_DATE\u95a2\u6570
\u5f15\u6570\u306b\u6307\u5b9a\u3055\u308c\u305f\u6587\u5b57\u5024\u3092\u65e5\u4ed8\u5024\u306b\u5909\u63db\u3057\u3066\u623b\u3059\u95a2\u6570\u3067\u3042\u308b\u3002
TO_DATE(’20-12-02′)<\/p>\n\n\n\n

TO_DATE(‘2003-JANUARY-05’, ‘RR-MON-DD’)<\/p>\n\n\n\n

\u25bcYY\u8981\u7d20\u3068RR\u8981\u7d20\u306e\u9055\u3044
YY \u53d7\u3051\u5165\u308c\u305f\u5024\uff08\u5e74\u306e\u4e0b2\u6841\uff09\u3092\u3001\u5e38\u306b\u73fe\u5728\u306e\u4e16\u7d00\u3068\u3057\u3066\u6271\u3046
RR \u53d7\u3051\u5165\u308c\u305f\u5024\uff08\u5e74\u306e\u4e0b2\u6841\uff09\u3092\u3001\u73fe\u5728\u306e\u5e74\u306b\u8fd1\u3044\u4e16\u7d00\u3068\u3057\u3066\u6271\u3046\u3002<\/p>\n\n\n\n

\u25a0NVL\u95a2\u6570
\u5f15\u6570\u306e\u5f0f1\u306b\u6307\u5b9a\u3055\u308c\u305f\u5024\u304cNULL\u5024\u4ee5\u5916\u306e\u5834\u5408\u306f\u3001\u5f0f1\u3092\u3001NULL\u5024\u306e\u5834\u5408\u306f\u3001\u5f0f2\u3092\u623b\u3059\u95a2\u6570\u3067\u3042\u308b\u3002
\u623b\u308a\u5730\u306e\u30c7\u30fc\u30bf\u578b\uff08\u6570\u5024\u3001\u6587\u5b57\u5024\u3001\u65e5\u4ed8\u5024\uff09\u306f\u3001\u5f0f1\u306e\u30c7\u30fc\u30bf\u578b\u3068\u304a\u306a\u3058\u306b\u306a\u308b\u3002
\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001\u6697\u9ed9\u7684\u306a\u30c7\u30fc\u30bf\u578b\u5909\u63db\u304c\u884c\u308f\u308c\u3001\u5909\u63db\u3067\u304d\u306a\u3044\u5834\u5408\u306f\u3001\u30a8\u30e9\u30fc\u3068\u6210\u308b\u3002<\/p>\n\n\n\n

NVL(\u5f0f1, \u5f0f2)
\u5f0f1\u3001\u5f0f2\u306f\u3001\u540c\u3058\u578b\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n\n\n

NVL2\u95a2\u6570
NVL2\u95a2\u6570\u306f\u3001\u5f15\u6570\u306e\u5f0f1\u306b\u6307\u5b9a\u3055\u308c\u305f\u5024\u304cNULL\u5024\u4ee5\u5916\u306e\u5834\u5408\u306f\u3001\u5f0f2\u3092\u3001NULL\u5024\u306e\u5834\u5408\u306f\u3001\u5f0f3\u3092\u623b\u3059\u95a2\u6570\u3067\u3042\u308b\u3002
\u623b\u308a\u5024\u306e\u30c7\u30fc\u30bf\u578b\uff08\u6570\u5024\u3001\u6587\u5b57\u5024\u3001\u65e5\u4ed8\u5024\uff09\u306f\u3001\u5e38\u306b\u5f0f2\u306e\u30c7\u30fc\u30bf\u578b\u3068\u540c\u3058\u306b\u306a\u308b\u3002
\u5909\u63db\u3067\u304d\u306a\u3044\u5834\u5408\u306f\u3001\u30a8\u30e9\u30fc\u3068\u6210\u308b\u3002
\u5f0f1\u304cNULL\u5024\u4ee5\u5916\uff70>\u5f0f2\u3092\u51fa\u529b
NVL2( \u5f0f1, \u5f0f2, \u5f0f3
\u5f0f1\u304cNULL\u5024\uff70>\u5f0f3\u3092\u51fa\u529b<\/p>\n\n\n\n

\u5f0f2\u3068\u5f0f3\u306f\u3001\u540c\u3058\u30c7\u30fc\u30bf\u578b\u3067\u306a\u3051\u308c\u3070\u3001\u30a8\u30e9\u30fc\u3068\u6210\u308b\u3002          \n\u30c7\u30fc\u30bf\u578b\u304c\u9055\u3046\u3068\u30a8\u30e9\u30fc\u3068\u306a\u308b\u3002         <\/code><\/pre>\n\n\n\n
\u25a0NULLIF\u95a2\u6570
NULLIF\u95a2\u6570\u306f\u3001\u5f15\u6570\u306b\u6307\u5b9a\u3055\u308c\u305f\uff12\u3064\u306e\u5024\u3092\u6bd4\u8f03\u3057\u3066\u3001\u7b49\u3057\u3044\u5834\u5408\u306fNULL\u5024\u3092\u623b\u3057\u3001\u7b49\u3057\u304f\u306a\u3044\u5834\u5408\u306f\u3001\u5f0f1\u3092\u623b\u3059\u95a2\u6570\u3067\u3042\u308b\u3002
\u5f0f1\u306b\u306f\u3001\u30ea\u30c6\u30e9\u30eb\u306eNULL\u5024\u4ee5\u5916\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002
\u5f0f2\u306b\u306f\u3001\u30ea\u30c6\u30e9\u30eb\u306eNULL\u5024\u3092\u6307\u5b9a\u3067\u304d\u308b\u3002
\u5f0f1\uff1d\u5f0f2\u306e\u5834\u5408\u306f\u3001NULL\u5024\u3092\u623b\u3059
NULLIF (\u5f0f1, \u5f0f2)
\u5f0f1<>\u5f0f2\u306e\u5834\u5408\u306f\u3001\u5f0f1\u3092\u623b\u3059\u3002<\/p>\n\n\n\n
\u25a0COALESCE\u95a2\u6570
COALESCE\u95a2\u6570\u306f\u3001\u5f15\u6570\u306b\u6307\u5b9a\u3055\u308c\u305f\u5f0f\u30ea\u30b9\u30c8\u3092\u5148\u982d\uff08\u5de6\u5074\uff09\u304b\u3089\u30c1\u30a7\u30c3\u30af\u3057\u3001\u6700\u521d\u306b\u898b\u3064\u304b\u3063\u305fNULL\u5024\u4ee5\u5916\u306e\u5024\u3092\u623b\u3059\u95a2\u6570\u3067\u3042\u308b\u3002
\u5168\u3066\u306e\u5f0f\u304cNULL\u5024\u306e\u5834\u5408\u306f\u3001NULL\u5024\u3092\u623b\u3059\u3002
COALESCE(\u5f0f1, \u5f0f2, \u5f0f3, \u5f0fn))<\/p>\n\n\n\n
\u5f0f\u30ea\u30b9\u30c8\u306b\u6307\u5b9a\u3059\u308b\u30c7\u30fc\u30bf\u306f\u3001\u3059\u3079\u3066\u540c\u3058\u30c7\u30fc\u30bf\u578b\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n\n\n
\u25a0\u6761\u4ef6\u5f0f\u3068DECODE\u95a2\u6570<\/p>\n\n\n\n
\u25a0CASE\u5f0f
CASE\u5f0f\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001SQL\u6587\u306e\u4e2d\u306bIF-THEN-ELSE\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3067\u304d\u308b\u3002<\/p>\n\n\n\n
CASE \u5f0f WHEN \u6761\u4ef6\u5f0f1 THEN \u623b\u308a\u50241
WHEN \u6761\u4ef6\u5f0fn THEN \u623b\u308a\u5024n
ELSE \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u623b\u308a\u5024
END<\/p>\n\n\n\n
ELSE\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u3001NULLT\u304c\u623b\u308a\u5024\u3068\u306a\u308b\u3002<\/p>\n\n\n\n
CASE\u5f0f\u306bBETWEEN\u6f14\u7b97\u5b50\u306f\u3001\u4f7f\u7528\u3067\u304d\u308b\u3002<\/p>\n\n\n\n
\u25a0DECODE\u95a2\u6570
CASE\u5f0f\u3068\u540c\u69d8\u306b\u3001SQL\u6587\u306e\u4e2d\u306bIF-THEN-ELSE\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3059\u308b\u3002
Oracle\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u56fa\u6709\u306e\u95a2\u6570\u3067\u3042\u308b\u3002
\u51e6\u7406\u624b\u9806\u3084\u623b\u308a\u5024\u306f\u3001CASE\u5f0f\u3068\u540c\u3058\u3067\u3042\u308b\u3002<\/p>\n\n\n\n
DECODE( \u5f0f(\u5bfe\u8c61\u5024), \u6761\u4ef6\u5f0f1, \u623b\u308a\u50241, \u6761\u4ef6\u5f0f2, \u623b\u308a\u50242, \u6761\u4ef6\u5f0f3, \u623b\u308a\u50243, \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u623b\u308a\u5024\uff09<\/p>\n\n\n\n
\u5bfe\u8c61\u5024\u306b\u5bfe\u3057\u3066\u3001\u6761\u4ef6\u5f0f\uff11\uff5e\uff13\u306b\u5f53\u3066\u306f\u307e\u3089\u306a\u5834\u5408\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u623b\u308a\u5024\u3092\u51fa\u529b\u3059\u308b\u3002<\/p>\n\n\n\n
FX\u4fee\u98fe\u5b50
FX\u3068\u306f\u3001Format eXact(\u53b3\u683c\u306a\u66f8\u5f0f\u4e00\u81f4)\u306e\u3053\u3068\u3002
\u6587\u5b57\u5217\u5f15\u6570\u306f2\u6841\u304c\u5fc5\u8981\u3067\u30011\u6841\u306e\u5834\u5408\u306f\u30a8\u30e9\u30fc\u3068\u6210\u308b\u3002
FX\u306e\u5834\u5408\u306f\u3001\u5927\u6587\u5b57\u3068\u5c0f\u6587\u5b57\u3092\u533a\u5225\u3057\u306a\u3044\u3002
FX\u306e\u6587\u5b57\u5217\u306b\u7a7a\u767d\u304c\u3042\u308c\u3070\u3001\u65e5\u4ed8\u66f8\u5f0f\u306b\u3082\u7a7a\u767d\u3092\u5165\u308c\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n\n\n
\u6570\u5024\u66f8\u5f0f\u8981\u7d20
\u30c9\u30eb\u8a18\u53f7\u3092\u3064\u3051\u308b\u6642\u306f\u3001\u6570\u5024\u66f8\u5f0f\u8981\u7d20\u306b\u30c9\u30eb\u8a18\u53f7\u3092\u4f7f\u3046\u3002
\u30c9\u30eb\u8a18\u53f7\u4ee5\u5916\u306e\u901a\u8ca8\u8a18\u53f7\u3092\u4ed8\u3051\u308b\u5834\u5408\u306f\u3001\u6570\u5024\u66f8\u5f0f\u8981\u7d20\u306bL\u3092\u4f7f\u3046\u3002<\/p>\n\n\n\n
L9,999,999 9\u306f\u6574\u6570\u90e8\u306e\u5148\u884c\u30bc\u30ed\u3092\u7a7a\u767d\u306b\u5909\u3048\u308b\uff08\u5148\u884c\u30bc\u30ed\u30d7\u30ec\u30b9\uff09
L0,000,000 0\u306f\u3001\u5148\u884c\u30bc\u30ed\u30920\u3068\u3057\u3066\u8868\u793a\u3059\u308b\u3002<\/p>\n\n\n\n
<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
<\/p>\n\n\n\n
\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
5.1\u3000\u30c7\u30fc\u30bf\u578b\u306e\u5909\u63db\u3068\u5909\u63db\u95a2\u6570 \u6697\u9ed9\u7684\u306a\u30c7\u30fc\u30bf\u578b\u5909\u63db\u30fb\u6570\u5024\u304c\u6c42\u3081\u3089\u308c\u3066\u3044\u308b\u7b87\u6240\u306b\u3001\u6587\u5b57\u5024\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u6587\u5b57\u5024\uff08CHAR\u578b\u30fbVARCHAR2\u578b\uff09\uff1e\uff1e\uff1e\u6570\u5024\uff08NUMBER\u578b\uff09\u306b\u5909\u63db\u3055\u308c\u308b\u3002 \u30fb\u65e5\u4ed8\u5024\u304c\u6c42\u3081\u3089\u308c\u3066\u3044\u308b\u7b87\u6240\u306b\u3001 […]<\/p>\n","protected":false},"author":1,"featured_media":973,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38,52,12],"tags":[],"class_list":{"0":"post-971","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\/971","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=971"}],"version-history":[{"count":1,"href":"https:\/\/skyit.biz\/index.php?rest_route=\/wp\/v2\/posts\/971\/revisions"}],"predecessor-version":[{"id":974,"href":"https:\/\/skyit.biz\/index.php?rest_route=\/wp\/v2\/posts\/971\/revisions\/974"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/skyit.biz\/index.php?rest_route=\/wp\/v2\/media\/973"}],"wp:attachment":[{"href":"https:\/\/skyit.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=971"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/skyit.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=971"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/skyit.biz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=971"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}