{"id":661,"date":"2012-08-02T17:52:09","date_gmt":"2012-08-02T08:52:09","guid":{"rendered":"https:\/\/clouds.tokyo\/blog\/?p=661"},"modified":"2017-04-12T17:56:26","modified_gmt":"2017-04-12T08:56:26","slug":"mysql_case","status":"publish","type":"post","link":"https:\/\/clouds.tokyo\/blog\/mysql_case\/","title":{"rendered":"\u3010MySQL\u3011SQL\u3067IF\u6587\uff08CASE\uff09\u3092\u4f7f\u3046"},"content":{"rendered":"<p>SQL\u3067\u6761\u4ef6\u306b\u3088\u3063\u3066\u8fd4\u3059\u5024\u3092\u5909\u3048\u305f\u3044\u3068\u304d\u3001<br \/>\nNULL\u306e\u3068\u304d\u306fIFNULL\u3067\u7c21\u5358\u3067\u3059\u304c\u3001<\/p>\n<pre>\r\nselect IFNULL(column1, 'NULL\u306e\u3068\u304d\u306b\u8fd4\u3059\u5024') as column1 from table1\r\n<\/pre>\n<p>IF\u6587\u306e\u3088\u3046\u306a\u6761\u4ef6\u5206\u5c90\u3092\u3055\u305b\u305f\u3044\u3068\u304d\u306b\u306f\u3001CASE\u6587\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre>\r\nselect \r\n  (CASE WHEN column1 = 1 THEN '\u3044\u3061' WHEN column1 = 2 THEN '\u306b' ELSE '\u305d\u308c\u4ee5\u5916' END) as column1\r\nfrom table1\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>SQL\u3067\u6761\u4ef6\u306b\u3088\u3063\u3066\u8fd4\u3059\u5024\u3092\u5909\u3048\u305f\u3044\u3068\u304d\u3001 NULL\u306e\u3068\u304d\u306fIFNULL\u3067\u7c21\u5358\u3067\u3059\u304c\u3001 select IFNULL(column1, &#8216;NULL\u306e\u3068\u304d\u306b\u8fd4\u3059\u5024&#8217;) as column1 from table1 IF\u6587\u306e\u3088 &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/clouds.tokyo\/blog\/mysql_case\/\" class=\"more-link\"><span class=\"screen-reader-text\">&#8220;\u3010MySQL\u3011SQL\u3067IF\u6587\uff08CASE\uff09\u3092\u4f7f\u3046&#8221; \u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_jetpack_newsletter_access":""},"categories":[2],"tags":[12,264,265],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pezW3u-aF","jetpack-related-posts":[{"id":500,"url":"https:\/\/clouds.tokyo\/blog\/mysql_grp_con\/","url_meta":{"origin":661,"position":0},"title":"\u3010MySQL\u3011\u8907\u6570\u884c\u306e\u7d50\u679c\u3092\u4e00\u884c\u306b\u307e\u3068\u3081\u3066\u8fd4\u3059","author":"yamamoto","date":"2011\u5e743\u670816\u65e5","format":false,"excerpt":"MySQL\u3067\u8907\u6570\u884c\u306e\u7d50\u679c\u30921\u884c\u306b\u307e\u3068\u3081\u308b\u306b\u306fGROUP_CONCAT\u95a2\u6570\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 SELECT\u2026","rel":"","context":"\u5099\u5fd8\u9332","block_context":{"text":"\u5099\u5fd8\u9332","link":"https:\/\/clouds.tokyo\/blog\/category\/memo\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":646,"url":"https:\/\/clouds.tokyo\/blog\/mysql_add_col\/","url_meta":{"origin":661,"position":1},"title":"\u3010MySQL\u3011\u30c6\u30fc\u30d6\u30eb\u306b\u30ab\u30e9\u30e0\u3092\u8ffd\u52a0\u3059\u308b","author":"yamamoto","date":"2012\u5e747\u670819\u65e5","format":false,"excerpt":"MySQL\u3067\u30c6\u30fc\u30d6\u30eb\u306b\u30ab\u30e9\u30e0\u3092\u5f8c\u304b\u3089\u8ffd\u52a0\u3059\u308b\u3068\u304d\u306e\u66f8\u5f0f\u3092\u3059\u3050\u5fd8\u308c\u308b\u306e\u3067\u30e1\u30e2\u3002 \u30c6\u30fc\u30d6\u30eb\u306e\u672b\u5c3e\u306b\u8ffd\u52a0 \u2026","rel":"","context":"\u5099\u5fd8\u9332","block_context":{"text":"\u5099\u5fd8\u9332","link":"https:\/\/clouds.tokyo\/blog\/category\/memo\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":728,"url":"https:\/\/clouds.tokyo\/blog\/mysql_locate\/","url_meta":{"origin":661,"position":2},"title":"\u3010MySQL\u3011PHP\u306estrpos\u3092SQL\u3067\u3084\u308b","author":"yamamoto","date":"2017\u5e745\u670818\u65e5","format":false,"excerpt":"MySQL\u306eLOCATE\u95a2\u6570\u3067PHP\u306estrpos\u95a2\u6570\u3068\u540c\u69d8\u306e\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 SELECT LOC\u2026","rel":"","context":"\u5099\u5fd8\u9332","block_context":{"text":"\u5099\u5fd8\u9332","link":"https:\/\/clouds.tokyo\/blog\/category\/memo\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":235,"url":"https:\/\/clouds.tokyo\/blog\/sql_auto_increment\/","url_meta":{"origin":661,"position":3},"title":"\u3010MySQL\u3011\u81ea\u524d\u3067\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u3092\u63a1\u756a\u3057\u3066INSERT","author":"yamamoto","date":"2009\u5e7412\u67081\u65e5","format":false,"excerpt":"MySQL\u306b\u306f\u81ea\u52d5\u3067\u63a1\u756a\u3059\u308bAUTO_INCREMENT\u3068\u3044\u3046\u8a2d\u5b9a\u304c\u3042\u308a\u307e\u3059\u3002 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