{"id":4648,"date":"2024-03-14T13:33:14","date_gmt":"2024-03-14T04:33:14","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e3%81%a7%e9%87%8d%e8%a4%87%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e4%b8%80%e6%8b%ac%e5%89%8a%e9%99%a4%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2025-08-02T22:43:16","modified_gmt":"2025-08-02T13:43:16","slug":"mysql%e3%81%a7%e9%87%8d%e8%a4%87%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e4%b8%80%e6%8b%ac%e5%89%8a%e9%99%a4%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e3%81%a7%e9%87%8d%e8%a4%87%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e4%b8%80%e6%8b%ac%e5%89%8a%e9%99%a4%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"mysql\u3067\u91cd\u8907\u30c7\u30fc\u30bf\u3092\u4e00\u62ec\u524a\u9664\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p>MySQL\u3067\u91cd\u8907\u30c7\u30fc\u30bf\u3092\u4e00\u62ec\u524a\u9664\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u624b\u9806\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\uff1a<\/p>\n<ol>\n<li>\u6700\u521d\u3001\u91cd\u8907\u3057\u3066\u3044\u308b\u30c7\u30fc\u30bf\u306e\u5217\u3092\u7279\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30c6\u30fc\u30d6\u30eb\u540d\u304ctable_name\u3067\u3001\u5217\u540d\u304ccolumn_name\u3067\u3001column_name\u5217\u306e\u91cd\u8907\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3057\u305f\u3044\u3068\u3057\u307e\u3059\u3002<\/li>\n<li>\u91cd\u8907\u30c7\u30fc\u30bf\u3092\u691c\u7d22\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u30af\u30a8\u30ea\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">SELECT<\/span> column_name, <span class=\"hljs-built_in\">COUNT<\/span>(<span class=\"hljs-operator\">*<\/span>) <span class=\"hljs-keyword\">AS<\/span> count\r\n<span class=\"hljs-keyword\">FROM<\/span> table_name\r\n<span class=\"hljs-keyword\">GROUP<\/span> <span class=\"hljs-keyword\">BY<\/span> column_name\r\n<span class=\"hljs-keyword\">HAVING<\/span> <span class=\"hljs-built_in\">COUNT<\/span>(<span class=\"hljs-operator\">*<\/span>) <span class=\"hljs-operator\">&gt;<\/span> <span class=\"hljs-number\">1<\/span>;\r\n<\/code><\/pre>\n<ol>\n<li>\u4e0a\u8a18\u306e\u30af\u30a8\u30ea\u7d50\u679c\u306b\u57fa\u3065\u3044\u3066\u3001\u524a\u9664\u3059\u3079\u304d\u91cd\u8907\u30c7\u30fc\u30bf\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306b\u3001\u4ee5\u4e0b\u306e\u30af\u30a8\u30ea\u3092\u4f7f\u7528\u3057\u3066\u91cd\u8907\u30c7\u30fc\u30bf\u3092\u524a\u9664\u3057\u307e\u3059\uff1a<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">DELETE<\/span> t1\r\n<span class=\"hljs-keyword\">FROM<\/span> table_name t1\r\n<span class=\"hljs-keyword\">INNER<\/span> <span class=\"hljs-keyword\">JOIN<\/span> table_name t2\r\n<span class=\"hljs-keyword\">WHERE<\/span> t1.id <span class=\"hljs-operator\">&gt;<\/span> t2.id\r\n<span class=\"hljs-keyword\">AND<\/span> t1.column_name <span class=\"hljs-operator\">=<\/span> t2.column_name;\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30af\u30a8\u30ea\u3067\u3001id\u306f\u30c6\u30fc\u30d6\u30eb\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u5217\u3067\u3059\u306e\u3067\u3001\u305d\u308c\u3092\u81ea\u5206\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u5217\u306b\u7f6e\u304d\u63db\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u64cd\u4f5c\u3092\u884c\u3046\u524d\u306b\u3001\u30c7\u30fc\u30bf\u3092\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3057\u3066\u304a\u304f\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u4e88\u671f\u3057\u306a\u3044\u4e8b\u614b\u306b\u5099\u3048\u3066\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u3067\u91cd\u8907\u30c7\u30fc\u30bf\u3092\u4e00\u62ec\u524a\u9664\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u624b\u9806\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\uff1a \u6700\u521d\u3001\u91cd\u8907\u3057\u3066\u3044\u308b\u30c7\u30fc\u30bf\u306e\u5217\u3092\u7279\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30c6\u30fc\u30d6\u30eb\u540d\u304ctable_name\u3067\u3001\u5217\u540d\u304ccolumn_name\u3067\u3001column_nam [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-4648","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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