{"id":4057,"date":"2012-11-21T01:00:00","date_gmt":"2012-11-20T16:00:00","guid":{"rendered":"http:\/\/keuko.exp.jp\/diary\/?p=4057"},"modified":"2012-11-21T01:00:00","modified_gmt":"2012-11-20T16:00:00","slug":"mysql%e3%81%ae%e3%82%84%e3%81%a4%e3%81%8c%ef%bc%81%ef%bc%88%e6%97%a5%e4%bb%98%e5%9e%8b%ef%bc%89","status":"publish","type":"post","link":"https:\/\/keuko.exp.jp\/diary\/?p=4057","title":{"rendered":"MySQL\u306e\u3084\u3064\u304c\uff01\uff08\u65e5\u4ed8\u578b\uff09"},"content":{"rendered":"

php\u3068MySQL\u3092\u4f7f\u3063\u305f\u30b7\u30b9\u30c6\u30e0\u3092\u3044\u304f\u3064\u304b\u4f5c\u3063\u3066\u3044\u308b\u306e\u3067\u3059\u304c\u3001php\u306f\u8a00\u3046\u306b\u53ca\u3070\u305a\u3001MySQL\u3082\u8ca0\u3051\u305a\u52a3\u3089\u305a\u3001\u52dd\u624b\u306a\u5909\u63db\u3092\u3057\u3066\u304f\u308c\u3061\u3083\u3063\u305f\u308a\u3057\u3061\u3083\u3063\u305f\u308a\u3059\u308b\u308f\u3051\u306a\u306e\u3067\u3059\u3002\u3067\u3082\u53b3\u5bc6\u306a\u66f8\u304d\u65b9\u3063\u3066\u3069\u3046\u3084\u308b\u306e\u304b\u77e5\u3089\u3093\u3002\uff08\u3044\u3061\u3044\u3061\u578b\u5909\u63db\u304b\u307e\u3059\u306e\u306f\u5acc\u3067\u3059\u3002\uff09
\n\u3048\u3048\u3068\u3001\u65e5\u4ed8\u578b\u306e\u6bd4\u8f03\u306e\u8a71\u306a\u306e\u3067\u3059\u304c\u300cyyyy\/mm\/dd\u300d\u3068\u3044\u3046\u7de8\u96c6\u5f62\u5f0f\u3067\u5165\u529b\u3055\u308c\u305f\u65e5\u4ed8\u3092\u6761\u4ef6\u306b\u3001\u30c7\u30fc\u30bf\u3092\u5f15\u3063\u5f35\u3063\u3066\u304d\u305f\u3044\u306e\u3067\u3059\u3002
\n\u540d\u79f0\uff1aTblWork
\n\u65e5\u4ed8\u306e\u5217\uff1aDate1\uff08date\u578b\uff09
\n\u3068\u3044\u3046\u30c6\u30fc\u30d6\u30eb\u304c\u3042\u308b\u3068\u601d\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u3061\u306a\u307f\u306b\u3001MySQL\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306f5.1.6\u3067\u3059\u3002
\n\u65e5\u4ed8\u306e\u5217\u306b\u300c2012\u5e7411\u670820\u65e5\u300d\u304c\u30bb\u30c3\u30c8\u3055\u308c\u3066\u3044\u308b\u30c7\u30fc\u30bf\u304c1\u4ef6\u3042\u308a\u307e\u3059\u3002
\nphp\u304b\u3089pdo\u3092\u4f7f\u3063\u3066\u3001\u65e5\u4ed8\u3092\u6761\u4ef6\u3068\u3057\u305fSQL\u6587\u3092\u6295\u3052\u307e\u3059\u3002
\n\u6761\u4ef6\u306f\u30d7\u30ec\u30fc\u30b9\u30db\u30eb\u30c0\u3092\u4f7f\u3063\u3066\u6307\u5b9a\u3057\u307e\u3059\u3002\u300c:cndDate\u300d\u306b\u306f\u300c’2012\/11\/20’\u300d\u3092\u30bb\u30c3\u30c8\u3057\u3066\u3044\u307e\u3059\u3002
\n\u65e5\u4ed8\u306f\u672c\u5f53\u306f\u300cyyyy-mm-dd\u300d\u3067\u6307\u5b9a\u3057\u305f\u3044\u3068\u3053\u308d\u3067\u3059\u304c\u3001\u3068\u308a\u3042\u3048\u305a\u3081\u3093\u3069\u304b\u3063\u305f\u306e\u3067\u305d\u306e\u307e\u307e\u3067\u3059\u3002\uff08\u3060\u3063\u3066\u3044\u3064\u3082\u305d\u308c\u3067\u691c\u7d22\u3057\u3066\u304f\u308c\u308b\u304b\u3089\u2026\u3002\uff09\u4eca\u56de\u3082\u9069\u5f53\u306b\u691c\u7d22\u3057\u3066\u304f\u308c\u308b\u3068\u601d\u3044\u304d\u3084\u3002\u3053\u308c\u304c\u306a\u305c\u3060\u304b\u4e0a\u624b\u304f\u3044\u304b\u306a\u3044\u306e\u3067\u3057\u305f\u3002
\n\u3082\u3057\u304b\u3057\u3066\u3001\u300cmm\/dd\/yyyy\u300d\u306a\u306e\uff1f\u3068\u601d\u3063\u3066\u300c2020\/12\/11\u300d\u3068\u304b\u300c2020\/11\/12\u300d\u3068\u304b\u3082\u30c7\u30fc\u30bf\u306b\u8ffd\u52a0\u3057\u3066\u307f\u305f\u306e\u3067\u3059\u304c\u3001\u305d\u308c\u3089\u3082\u30d2\u30c3\u30c8\u305b\u305a\u3002
\n\u4ee5\u4e0b\u3001\u8272\u3005\u8a66\u3057\u305f\u306e\u3067\u305d\u306e\u7d50\u679c\u3002\u30d2\u30c3\u30c8\u3059\u308b\u3082\u306e\u3092\u25cb\u3001\u3057\u306a\u3044\u3082\u306e\u3092\u00d7\u3068\u3057\u307e\u3057\u305f\u3002
\n(1) \u305d\u306e\u307e\u307e\u6761\u4ef6\u306b\u3059\u308b \u2192 \u25cb
\nSELECT * FROM `TblWork` WHERE `Date1` = :cndDate;<\/p>\n

(2) IFNULL\u95a2\u6570\u3092\u4f7f\u3046 \u2192 \u00d7
\nSELECT * FROM `TblWork` WHERE IFNULL(`Date1`, ‘2012-11-20’) = :cndDate;
\n\u65e5\u4ed8\u304cNULL\u306e\u5834\u5408\u306f\u3001\u7121\u6761\u4ef6\u306b\u8a72\u5f53\u3055\u305b\u305f\u304b\u3063\u305f\u306e\u3067\u3059\u304c\u3001\u3053\u308c\u304c\u306a\u305c\u3060\u304b\u4e0a\u624b\u304f\u3044\u304b\u305a\u3002<\/p>\n

(3) IFNULL\u95a2\u6570\u3092\u4f7f\u3046\uff08\u305d\u306e2\uff09 \u2192 \u00d7
\nSELECT * FROM `TblWork` WHERE IFNULL(`Date1`, DATE(‘2012-11-20’)) = :cndDate;
\nNULL\u306e\u5834\u5408\u306e\u623b\u308a\u5024\u306bDATE\u95a2\u6570\u3092\u4f7f\u3063\u3066\u307f\u308b\u3082\u5909\u308f\u3089\u305a\u3002<\/p>\n

(4) \u6761\u4ef6\u306e\u5f62\u5f0f\u3092\u5909\u3048\u3066\u307f\u305f \u2192 \u25cb
\nSELECT * FROM `TblWork` WHERE `Date1` = ‘2012-11-20’;
\n\u300c\/\u300d\u3092\u4f7f\u3063\u305f\u7de8\u96c6\u5f62\u5f0f\u304c\u60aa\u3044\u306e\u306f\u5206\u304b\u3063\u3066\u308b\u3093\u3060\u3001\u3046\u3093\u2026\u3002<\/p>\n

(5) \u5217\u306e\u65b9\u306bDATE\u95a2\u6570\u3092\u4f7f\u3063\u3066\u307f\u305f \u2192 \u25cb
\nSELECT * FROM `TblWork` WHERE DATE(IFNULL(`Date1`, ‘2012-11-20’)) = :cndDate;<\/p>\n

(6) \u6761\u4ef6\u306e\u65b9\u306bDATE\u95a2\u6570\u3092\u4f7f\u3063\u3066\u307f\u305f \u2192 \u25cb
\nSELECT * FROM `TblWork` WHERE IFNULL(`Date1`, ‘2012-11-20’) = DATE(:cndDate);<\/p>\n

\u3046\u3093\u307e\u3042\u3001\u7d20\u76f4\u306b\u300cyyyy-mm-dd\u300d\u4f7f\u3048\u3070\u3044\u3044\u3093\u3067\u3057\u3087\u3046\u306d\u3002
\n\u3067\u3082\u3001(3)\u3068(5)\u306e\u9055\u3044\u304c\u5206\u304b\u3093\u306a\u3044\u3093\u3060\u308f\u30fc\u3002\u3068\u304b\u601d\u3063\u3066\u305f\u3089\u3001\u3053\u3046\u3044\u3046\u3053\u3068\u3060\u305d\u3046\u3067\u3059\u3002<\/p>\n

\nIFNULL(expr1,expr2)
\nexpr1 \u304c NULL \u3067\u306a\u3044\u5834\u5408\u3001IFNULL() \u306f expr1 \u3092\u623b\u3057\u3001\u305d\u308c\u4ee5\u5916\u3067\u306f expr2
\n\u3092\u623b\u3057\u307e\u3059\u3002IFNULL() \u306f\u3001\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u6587\u8108\u306b\u3088\u3063\u3066\u3001\u6570\u5024\u5024\u3082\u3057\u304f\u306f\u30b9\u30c8
\n\u30ea\u30f3\u30b0\u5024\u3092\u623b\u3057\u307e\u3059\u3002\n<\/p><\/blockquote>\n

IFNULL\u95a2\u6570\u3001\u6587\u5b57\u5217\u578b\u3067\u8fd4\u3059\u306e\u3067\u3059\u306d\u2026\u3002(3)\u306f\u6587\u5b57\u5217\u540c\u58eb\u306e\u6bd4\u8f03\u306b\u306a\u3063\u3066\u308b\u304b\u3089\u300c2012-11-20\u300d\uff08\u6587\u5b57\u5217\uff09\u3068\u300c2012\/11\/20\u300d\uff08\u6587\u5b57\u5217\uff09\u3067\u4e00\u81f4\u305b\u305a\u3001\u3060\u3063\u305f\u308f\u3051\u3067\u3059\u306d\u3002\u3093\u3067\u3001(5)\u306f\u300c2012-11-20\u300d\uff08\u65e5\u4ed8\uff09\u3068\u300c2012\/11\/20\u300d\uff08\u65e5\u4ed8\u306b\u5909\u63db\uff09\u3067\u4e00\u81f4\u3057\u305f\u3068\u3002\u305d\u3046\u3044\u3046\u3053\u3068\u3067\u3059\u304b\u306d\u3002
\n\u3046\u30fc\u3093\u3001\u5206\u304b\u3089\u3093\u3002\u5730\u9053\u306b\u8a66\u3059\u3057\u304b\u306a\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u306d\u3002\u3046\u3046\u3046\u3002
\n\u3042\u3001\u591a\u5206\u30d7\u30ec\u30fc\u30b9\u30db\u30eb\u30c0\u3068\u304bpdo\u3068\u304b\u306f\u95a2\u4fc2\u306a\u3044\u611f\u3058\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

php\u3068MySQL\u3092\u4f7f\u3063\u305f\u30b7\u30b9\u30c6\u30e0\u3092\u3044\u304f\u3064\u304b\u4f5c\u3063\u3066\u3044\u308b\u306e\u3067\u3059\u304c\u3001php\u306f\u8a00\u3046\u306b\u53ca\u3070\u305a\u3001MySQL\u3082\u8ca0\u3051\u305a\u52a3\u3089\u305a\u3001\u52dd\u624b\u306a\u5909\u63db\u3092\u3057\u3066\u304f\u308c\u3061\u3083\u3063\u305f\u308a\u3057\u3061\u3083\u3063\u305f\u308a\u3059\u308b\u308f\u3051\u306a\u306e\u3067\u3059\u3002\u3067\u3082\u53b3\u5bc6\u306a\u66f8\u304d\u65b9\u3063\u3066\u3069\u3046\u3084\u308b\u306e\u304b\u77e5\u3089\u3093\u3002\uff08\u3044\u3061\u3044<\/p>\n

\u7d9a\u304d\u3092\u8aad\u3080 \u2192<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-4057","post","type-post","status-publish","format-standard","hentry","category-job"],"_links":{"self":[{"href":"https:\/\/keuko.exp.jp\/diary\/index.php?rest_route=\/wp\/v2\/posts\/4057","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/keuko.exp.jp\/diary\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/keuko.exp.jp\/diary\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/keuko.exp.jp\/diary\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/keuko.exp.jp\/diary\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4057"}],"version-history":[{"count":0,"href":"https:\/\/keuko.exp.jp\/diary\/index.php?rest_route=\/wp\/v2\/posts\/4057\/revisions"}],"wp:attachment":[{"href":"https:\/\/keuko.exp.jp\/diary\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4057"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/keuko.exp.jp\/diary\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4057"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/keuko.exp.jp\/diary\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}