{"id":6918,"date":"2025-08-01T13:46:33","date_gmt":"2025-08-01T04:46:33","guid":{"rendered":"https:\/\/taitan916.info\/blog\/?p=6918"},"modified":"2025-08-01T14:01:29","modified_gmt":"2025-08-01T05:01:29","slug":"post-6918","status":"publish","type":"post","link":"https:\/\/taitan916.info\/blog\/archives\/6918","title":{"rendered":"MySQL\u306b\u3066ORDER BY\u3067\u4e26\u3079\u66ff\u3048\u308b\u969b\u306b\u7a7a\u306e\u30ab\u30e9\u30e0\u306f\u5f8c\u308d\u306b\u6301\u3063\u3066\u304f\u308b\u65b9\u6cd5"},"content":{"rendered":"

MySQL\u306b\u3066ORDER BY\u3067\u4e26\u3079\u66ff\u3048\u308b\u969b\u306b\u7a7a\u306e\u30ab\u30e9\u30e0\u306e\u5834\u5408\u306f\u5f8c\u308d\u306b\u6301\u3063\u3066\u3044\u304d\u3001\u305d\u306e\u4e0a\u3067ID(\u901a\u3057\u756a\u53f7)\u9806\u306b\u4e26\u3079\u66ff\u3048\u305f\u3044\u3002\u5177\u4f53\u7684\u306b\u306f\u300c\u7a7a\u3058\u3083\u306a\u3044\u30ab\u30e9\u30e0\u306eID\u9806\u2192\u7a7a\u306e\u30ab\u30e9\u30e0\u306eID\u9806\u300d\u3068\u3044\u3046\u9806\u5e8f\u306b\u4e26\u3079\u66ff\u3048\u305f\u3044\u3002\u4ee5\u4e0b\u306b\u5bfe\u5fdc\u65b9\u6cd5\u3092\u30e1\u30e2\u3002<\/p>\n

 <\/p>\n

\u30c6\u30fc\u30d6\u30eb\u69cb\u9020<\/h2>\n
mysql> SHOW COLUMNS FROM `test_table`;\r\n+-------+--------------+------+-----+---------+----------------+\r\n| Field | Type         | Null | Key | Default | Extra          |\r\n+-------+--------------+------+-----+---------+----------------+\r\n| id    | int          | NO   | PRI | NULL    | auto_increment |\r\n| name  | varchar(255) | NO   |     | NULL    |                |\r\n+-------+--------------+------+-----+---------+----------------+<\/pre>\n
 <\/p>\n
\u30c7\u30fc\u30bf\u5185\u5bb9<\/h2>\n
mysql> TABLE `test_table`;\r\n+----+--------+\r\n| id | name   |\r\n+----+--------+\r\n|  1 | \u5c71\u7530   |\r\n|  2 |        |\r\n|  3 | \u9234\u6728   |\r\n|  4 |        |\r\n|  5 | \u7530\u4e2d   |\r\n+----+--------+<\/pre>\n
 <\/p>\n
\u5bfe\u5fdc\u65b9\u6cd5<\/h2>\n
SELECT * \r\nFROM `test_table` \r\nORDER BY \r\nCASE\r\n    WHEN `name` IS NULL THEN \"2\"\r\n    WHEN `name` = \"\" THEN \"1\"\r\n    else \"0\"\r\nEND, \r\n    `id` ASC;\r\n\r\n+----+--------+\r\n| id | name   |\r\n+----+--------+\r\n|  1 | \u5c71\u7530   |\r\n|  3 | \u9234\u6728   |\r\n|  5 | \u7530\u4e2d   |\r\n|  2 |        |\r\n|  4 |        |\r\n+----+--------+<\/pre>\n
name\u30ab\u30e9\u30e0\u304c\u7a7a\u306e\u30c7\u30fc\u30bf\u3092\u5f8c\u308d\u306b\u6301\u3063\u3066\u3044\u304d\u3001\u305d\u306e\u4e0a\u3067ID\u9806\u306b\u30bd\u30fc\u30c8\u3055\u308c\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
MySQL\u306b\u3066ORDER BY\u3067\u4e26\u3079\u66ff\u3048\u308b\u969b\u306b\u7a7a\u306e\u30ab\u30e9\u30e0\u306e\u5834\u5408\u306f\u5f8c\u308d\u306b\u6301\u3063\u3066\u3044\u304d ... <\/p>\n","protected":false},"author":1,"featured_media":1072,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5,66],"tags":[],"class_list":["post-6918","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mysql","category-database"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t