{"id":15628,"date":"2024-03-16T01:47:55","date_gmt":"2024-03-15T16:47:55","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e3%81%a7%e4%bd%95%e7%99%be%e4%b8%87%e3%81%ae%e3%83%87%e3%83%bc%e3%82%bf%e3%83%86%e3%83%bc%e3%83%96%e3%83%ab%e3%81%ab%e3%83%95%e3%82%a3%e3%83%bc%e3%83%ab%e3%83%89%e3%82%92%e8%bf%bd%e5%8a%a0\/"},"modified":"2025-08-06T03:26:21","modified_gmt":"2025-08-05T18:26:21","slug":"mysql%e3%81%a7%e4%bd%95%e7%99%be%e4%b8%87%e3%81%ae%e3%83%87%e3%83%bc%e3%82%bf%e3%83%86%e3%83%bc%e3%83%96%e3%83%ab%e3%81%ab%e3%83%95%e3%82%a3%e3%83%bc%e3%83%ab%e3%83%89%e3%82%92%e8%bf%bd%e5%8a%a0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e3%81%a7%e4%bd%95%e7%99%be%e4%b8%87%e3%81%ae%e3%83%87%e3%83%bc%e3%82%bf%e3%83%86%e3%83%bc%e3%83%96%e3%83%ab%e3%81%ab%e3%83%95%e3%82%a3%e3%83%bc%e3%83%ab%e3%83%89%e3%82%92%e8%bf%bd%e5%8a%a0\/","title":{"rendered":"mysql\u3067\u4f55\u767e\u4e07\u306e\u30c7\u30fc\u30bf\u30c6\u30fc\u30d6\u30eb\u306b\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u3059\u304b\uff1f"},"content":{"rendered":"

\u5343\u4e07\u306e\u30c7\u30fc\u30bf\u8868\u306b\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u3001\u6b21\u306e\u624b\u9806\u306b\u5f93\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n

    \n
  1. \u6700\u521d\u306b\u3001\u3053\u306e\u64cd\u4f5c\u3092\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u5341\u5206\u306a\u30b7\u30b9\u30c6\u30e0\u30ea\u30bd\u30fc\u30b9\u304c\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4f55\u5343\u3082\u306e\u30c7\u30fc\u30bf\u30c6\u30fc\u30d6\u30eb\u306e\u64cd\u4f5c\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u8ca0\u8377\u3092\u904e\u5270\u306b\u3057\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30b5\u30fc\u30d0\u30fc\u304c\u5341\u5206\u306a\u30e1\u30e2\u30ea\u3068\u51e6\u7406\u80fd\u529b\u3092\u6301\u3063\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n
  2. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3092\u884c\u3046\u524d\u306b\u306f\u3001\u5fc5\u305a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u30c7\u30fc\u30bf\u3092\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u4e88\u671f\u305b\u306c\u30c8\u30e9\u30d6\u30eb\u3092\u9632\u3050\u305f\u3081\u3067\u3059\u3002<\/li>\n
  3. ALTER TABLE\u6587\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002ALTER TABLE\u6587\u306f\u3001\u65e2\u5b58\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u3092\u5909\u66f4\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/li>\n
  4. \u30c6\u30fc\u30d6\u30eb\u540d\u306b\u30ab\u30e9\u30e0\u540d\u3068\u305d\u306e\u5b9a\u7fa9\u3092\u8ffd\u52a0\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\uff1a
    \nALTER TABLE \u30c6\u30fc\u30d6\u30eb\u540d
    \nADD \u30ab\u30e9\u30e0\u540d \u30ab\u30e9\u30e0\u5b9a\u7fa9;<\/li>\n
  5. table_name \u306f\u5909\u66f4\u3059\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u540d\u79f0\u3067\u3042\u308a\u3001 column_name \u306f\u8ffd\u52a0\u3059\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u540d\u79f0\u3067\u3042\u308a\u3001column_definition\u306f\u30c7\u30fc\u30bf\u578b\u3001\u5236\u7d04\u306a\u3069\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5b9a\u7fa9\u3092\u542b\u3093\u3067\u3044\u307e\u3059\u3002<\/li>\n
  6. \u4f8b\u3048\u3070\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c6\u30fc\u30d6\u30eb\u3067\u3042\u308b”users”\u306b”email”\u3068\u3044\u3046\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u306e\u6587\u3092\u4f7f\u7528\u3057\u307e\u3059\uff1a<\/li>\n
  7. \u30e6\u30fc\u30b6\u30fc\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u3057\u3066\u3001email VARCHAR(255) \u5217\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/li>\n
  8. \u3053\u306e\u64cd\u4f5c\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u30c6\u30fc\u30d6\u30eb\u306b255\u6587\u5b57\u306eVARCHAR\u30bf\u30a4\u30d7\u306eemail\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/li>\n
  9. \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5185\u306b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u304c\u3042\u308b\u305f\u3081\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u8ffd\u52a0\u306b\u306f\u6642\u9593\u304c\u304b\u304b\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u3001\u3053\u306e\u64cd\u4f5c\u3092\u8907\u6570\u306e\u5c0f\u3055\u306a\u30d0\u30c3\u30c1\u51e6\u7406\u306b\u5206\u5272\u3057\u3066\u3001\u30ea\u30bd\u30fc\u30b9\u3092\u52b9\u679c\u7684\u306b\u7ba1\u7406\u3057\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3053\u3068\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u3092\u8003\u616e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n
  10. \u4f8b\u3048\u3070\u3001\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u91cf\u3092\u5236\u9650\u3059\u308b\u305f\u3081\u306bLIMIT\u3068OFFSET\u53e5\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u4e00\u3064\u306e\u4f8b\u3067\u3059\uff1a<\/li>\n
  11. ALTER TABLE users
    \nADD email VARCHAR(255);UPDATE users
    \nSET email = ‘example@example.com’
    \nWHERE email IS NULL
    \nLIMIT 1000000;<\/p>\n

    UPDATE users
    \nSET email = ‘example@example.com’
    \nWHERE email IS NULL
    \nLIMIT 1000000
    \nOFFSET 1000000;<\/p>\n

    — \u6b8b\u308a\u306e\u30c7\u30fc\u30bf\u3082\u540c\u3058\u65b9\u6cd5\u3067\u66f4\u65b0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n

  12. \u6bce\u56de\u306e\u66f4\u65b0\u3054\u3068\u306b1000000\u884c\u306e\u30c7\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u3001\u6bb5\u968e\u7684\u306b\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u8ffd\u52a0\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/li>\n
  13. \u65b0\u3057\u3044\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u969b\u306b\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3068\u5236\u7d04\u3092\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002ALTER TABLE\u6587\u3067\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3068\u5236\u7d04\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u78ba\u4fdd\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001<\/li>\n
  14. ALTER TABLE users
    \nADD email VARCHAR(255) NOT NULL DEFAULT ”;\u30c6\u30fc\u30d6\u30eb(users)\u3092\u5909\u66f4\u3057\u3066\u3001email\u3068\u3044\u3046\u30ab\u30e9\u30e0\u3092\u8ffd\u52a0\u3057\u3001VARCHAR(255)\u306e\u30c7\u30fc\u30bf\u578b\u3067\u3001NULL\u3092\u8a31\u3055\u305a\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306f\u7a7a\u6587\u5b57\u3068\u3059\u308b\u3002<\/li>\n
  15. email\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u969b\u306b\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3068\u3057\u3066\u7a7a\u306e\u6587\u5b57\u5217\u3092\u6307\u5b9a\u3057\u3001\u305d\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u7a7a\u3067\u306a\u3044\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/li>\n
  16. ALTER TABLE\u6587\u306e\u5168\u3066\u304c\u5b8c\u4e86\u3057\u305f\u5f8c\u3001\u6570\u5343\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u6b63\u5e38\u306b\u8ffd\u52a0\u3055\u308c\u305f\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u306f\u3001DESCRIBE\u6587\u3084SHOW COLUMNS\u6587\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u6b63\u5e38\u306b\u8ffd\u52a0\u3055\u308c\u305f\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n

    \u3053\u306e\u64cd\u4f5c\u3092\u884c\u3046\u524d\u306b\u3001\u5341\u5206\u306a\u30c6\u30b9\u30c8\u3092\u884c\u3044\u3001\u751f\u7523\u74b0\u5883\u3067\u306e\u6ce8\u610f\u6df1\u3044\u64cd\u4f5c\u3092\u78ba\u8a8d\u3057\u3066\u3001\u30c7\u30fc\u30bf\u306e\u640d\u5931\u3084\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u554f\u984c\u3092\u56de\u907f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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