{"id":5442,"date":"2025-07-30T14:44:55","date_gmt":"2025-07-30T05:44:55","guid":{"rendered":"https:\/\/sky-peace.net\/?p=5442"},"modified":"2025-07-30T14:44:55","modified_gmt":"2025-07-30T05:44:55","slug":"db-union","status":"publish","type":"post","link":"https:\/\/sky-peace.net\/certified\/db-union\/","title":{"rendered":"UNION\uff0fUNION ALL\u306eSQL\u554f\u984c\u5bfe\u7b56\u2502\u5348\u5f8c\u8a66\u9a13\u3067\u72d9\u308f\u308c\u308b\u6587\u8108\u3068\u9078\u3073\u65b9"},"content":{"rendered":"

\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306eSQL\u69cb\u6587\u306b\u304a\u3044\u3066\u3001\u300cUNION\u300d\u3068\u300cUNION ALL\u300d\u306f\u201c\u30c7\u30fc\u30bf\u306e\u7d71\u5408\u201d\u3092\u884c\u3046\u91cd\u8981\u306a\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u3059\u3002\u7279\u306b\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u306e\u5348\u5f8c\u554f\u984c<\/strong>\u3067\u306f\u3001\u7a74\u57cb\u3081\u5f62\u5f0f\u3067\u300cUNION\u300d\u304b\u300cUNION ALL\u300d\u306e\u3069\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\u304b\u3092\u554f\u308f\u308c\u308b\u30b1\u30fc\u30b9\u304c\u983b\u51fa\u3067\u3059\u3002<\/p>\n

\u3069\u3061\u3089\u3082\u300c\u8907\u6570\u306eSELECT\u6587\u306e\u7d50\u679c\u3092\u307e\u3068\u3081\u308b\u300d\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u304c\u3001\u91cd\u8907\u306e\u6271\u3044<\/strong>\u3084\u5b9f\u884c\u901f\u5ea6<\/strong>\u3001\u610f\u56f3\u3059\u308b\u7d50\u679c\u306e\u9055\u3044<\/strong>\u306a\u3069\u3001\u7d30\u304b\u3044\u4ed5\u69d8\u306e\u5dee\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u9055\u3044\u3092\u66d6\u6627\u306a\u307e\u307e\u306b\u3057\u3066\u304a\u304f\u3068\u3001\u300c\u306a\u305c\u3053\u3061\u3089\u3092\u4f7f\u3046\u3079\u304d\u304b\u300d\u3068\u3044\u3046\u7406\u7531\u304c\u8aac\u660e\u3067\u304d\u305a\u3001\u5f97\u70b9\u306b\u3064\u306a\u304c\u308a\u306b\u304f\u304f\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n

\u307e\u305f\u3001\u6df7\u540c\u3057\u3084\u3059\u3044\u6982\u5ff5\u306b\u300cJOIN\u300d\u304c\u3042\u308a\u307e\u3059\u3002\u300cJOIN\u300d\u3082\u30c7\u30fc\u30bf\u3092\u7d50\u5408\u3059\u308b\u69cb\u6587\u3067\u3059\u304c\u3001\u884c\uff08\u30ec\u30b3\u30fc\u30c9\uff09\u3092\u6a2a\u306b\u7d50\u5408\u3059\u308b<\/strong>\u306e\u306b\u5bfe\u3057\u3001\u300cUNION\u300d\u306f\u7e26\u306b\u7d71\u5408\u3059\u308b<\/strong>\u3068\u3044\u3046\u672c\u8cea\u7684\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u70b9\u3082\u8a66\u9a13\u3067\u306f\u3072\u3063\u304b\u3051\u3068\u3057\u3066\u72d9\u308f\u308c\u3084\u3059\u304f\u3001\u4e21\u8005\u306e\u5f79\u5272\u306e\u9055\u3044\u3092\u660e\u78ba\u306b\u7406\u89e3\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u8a66\u9a13\u3067\u306e\u51fa\u984c\u50be\u5411\u3092\u8e0f\u307e\u3048\u306a\u304c\u3089\u3001\u300cUNION\u300d\u300cUNION ALL\u300d\u305d\u3057\u3066\u300cJOIN\u300d\u3068\u306e\u9055\u3044\u30fb\u4f7f\u3044\u3069\u3053\u308d\u3092\u4f53\u7cfb\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u52a0\u3048\u3066\u3001\u76f4\u611f\u7684\u306b\u7406\u89e3\u3057\u3084\u3059\u3044\u3088\u3046\u306b\u56f3\u89e3\u30fb\u8868\u30fb\u5177\u4f53\u4f8b<\/strong>\u3082\u4ea4\u3048\u3066\u3001\u6587\u8108\u3054\u3068\u306e\u5224\u65ad\u30dd\u30a4\u30f3\u30c8\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n

\u300c\u4f3c\u305f\u3088\u3046\u306a\u69cb\u6587\u3060\u3051\u3069\u3001\u3069\u3063\u3061\u3092\u9078\u3079\u3070\u3044\u3044\u306e\u304b\u5206\u304b\u3089\u306a\u3044\u300d\u2500\u2500\u305d\u3093\u306a\u60a9\u307f\u3092\u3053\u306e\u8a18\u4e8b\u3067\u4e00\u6c17\u306b\u89e3\u6d88\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n

<\/p>\n

UNION\u3068UNION ALL\u306e\u57fa\u672c\u69cb\u6587\u3068\u9055\u3044\u2502SQL\u8a66\u9a13\u5bfe\u7b56\u306b\u5fc5\u8981\u306a\u524d\u63d0\u77e5\u8b58<\/h2>\n

SQL\u306b\u304a\u3051\u308b\u300cUNION\u300d\u3068\u300cUNION ALL\u300d\u306f\u3001\u8907\u6570\u306eSELECT\u6587\u306e\u7d50\u679c\u3092\u7e26\u65b9\u5411\u306b\u7d71\u5408<\/strong>\u3059\u308b\u305f\u3081\u306e\u69cb\u6587\u3067\u3059\u3002\u3069\u3061\u3089\u3082\u300c\u5217\u306e\u69cb\u9020\u304c\u4e00\u81f4\u3057\u3066\u3044\u308bSELECT\u6587\u300d\u306b\u5bfe\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u304c\u3001\u52d5\u4f5c\u306b\u306f\u660e\u78ba\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u25a0 \u57fa\u672c\u69cb\u6587<\/h3>\n
\nSELECT \u5217\u540d1, \u5217\u540d2 FROM \u30c6\u30fc\u30d6\u30ebA\nUNION\nSELECT \u5217\u540d1, \u5217\u540d2 FROM \u30c6\u30fc\u30d6\u30ebB;\n<\/code><\/pre>\n
\u300cUNION ALL\u300d\u306b\u3059\u308b\u5834\u5408\u306f\u3001\u5358\u306b UNION<\/code> \u3092 UNION ALL<\/code> \u306b\u7f6e\u304d\u63db\u3048\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n
\u25a0 UNION\u3068UNION ALL\u306e\u9055\u3044\uff08\u8868\u3067\u6574\u7406\uff09<\/h3>\n\n\n\n\n\n\n\n\n
\u9805\u76ee<\/th>\nUNION<\/th>\nUNION ALL<\/th>\n<\/tr>\n<\/thead>\n
\u91cd\u8907\u884c\u306e\u6271\u3044<\/td>\n\u81ea\u52d5\u7684\u306b\u524a\u9664<\/td>\n\u305d\u306e\u307e\u307e\u6b8b\u3059<\/td>\n<\/tr>\n
\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/td>\n\u9045\u3044\uff08\u91cd\u8907\u524a\u9664\u306b\u30b3\u30b9\u30c8\uff09<\/td>\n\u901f\u3044<\/td>\n<\/tr>\n
\u4e3b\u306a\u7528\u9014<\/td>\n\u91cd\u8907\u9664\u5916\u304c\u5fc5\u8981\u306a\u96c6\u8a08<\/td>\n\u5168\u30c7\u30fc\u30bf\u3092\u78ba\u8a8d\u3057\u305f\u3044\u5834\u9762<\/td>\n<\/tr>\n
\u8a66\u9a13\u3067\u306e\u30dd\u30a4\u30f3\u30c8<\/td>\n\u610f\u56f3\u304c\u660e\u78ba\u306a\u3089\u3053\u3061\u3089<\/td>\n\u30c7\u30d5\u30a9\u30eb\u30c8\u306a\u3089ALL\u304c\u554f\u308f\u308c\u3084\u3059\u3044<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u25a0 \u56f3\u89e3\uff1aUNION\u3068UNION ALL\u306e\u52d5\u4f5c\u30a4\u30e1\u30fc\u30b8<\/h3>\n
\u56f31\uff1aUNION \u306e\u30a4\u30e1\u30fc\u30b8\uff08\u91cd\u8907\u524a\u9664\uff09<\/h4>\n
\u30c6\u30fc\u30d6\u30ebA             \u30c6\u30fc\u30d6\u30ebB\n+------+-------+       +------+-------+\n| \u540d\u524d | \u58f2\u4e0a  |       | \u540d\u524d | \u58f2\u4e0a  |\n+------+-------+       +------+-------+\n| \u7530\u4e2d | 100   |       | \u7530\u4e2d | 100   |\n| \u9234\u6728 | 150   |       | \u5c71\u7530 | 200   |\n+------+-------+       +------+-------+\n\n         \u2193  (UNION)\n\n\u91cd\u8907\u3092\u524a\u9664\u3057\u3066\u30e6\u30cb\u30fc\u30af\u306a\u884c\u3060\u3051\u6b8b\u308b\n\n+------+-------+\n| \u540d\u524d | \u58f2\u4e0a  |\n+------+-------+\n| \u7530\u4e2d | 100   |\n| \u9234\u6728 | 150   |\n| \u5c71\u7530 | 200   |\n+------+-------+<\/code><\/pre>\n
\u56f32\uff1aUNION ALL \u306e\u30a4\u30e1\u30fc\u30b8\uff08\u91cd\u8907\u3082\u6b8b\u3059\uff09<\/h4>\n
\u30c6\u30fc\u30d6\u30ebA             \u30c6\u30fc\u30d6\u30ebB\n+------+-------+       +------+-------+\n| \u540d\u524d | \u58f2\u4e0a  |       | \u540d\u524d | \u58f2\u4e0a  |\n+------+-------+       +------+-------+\n| \u7530\u4e2d | 100   |       | \u7530\u4e2d | 100   |\n| \u9234\u6728 | 150   |       | \u5c71\u7530 | 200   |\n+------+-------+       +------+-------+\n\n         \u2193  (UNION ALL)\n\n\u91cd\u8907\u3082\u305d\u306e\u307e\u307e\u51fa\u529b\n\n+------+-------+\n| \u540d\u524d | \u58f2\u4e0a  |\n+------+-------+\n| \u7530\u4e2d | 100   |\n| \u9234\u6728 | 150   |\n| \u7530\u4e2d | 100   | \u2190 \u91cd\u8907\u3082\u6b8b\u308b\n| \u5c71\u7530 | 200   |\n+------+-------+\n\n<\/code><\/pre>\n
\u8981\u70b9<\/strong><\/p>\n
    \n
  • UNION<\/strong>\uff1a\u5168\u5217\u304c\u540c\u4e00\u306e\u884c\u306f\u91cd\u8907\u3068\u3057\u3066\u524a\u9664\uff08\u30e6\u30cb\u30fc\u30af\u5316\uff09<\/li>\n
  • UNION ALL<\/strong>\uff1a\u91cd\u8907\u884c\u3082\u524a\u9664\u305b\u305a\u5168\u3066\u51fa\u529b\uff08\u9ad8\u901f\uff09<\/li>\n<\/ul>\n
    \u25a0 \u8eab\u8fd1\u306a\u4f8b\u3048\u3067\u7406\u89e3\u3059\u308b\uff1a\u30d5\u30a9\u30eb\u30c0\u6574\u7406\u306e\u8996\u70b9<\/h3>\n
    2\u3064\u306e\u30d5\u30a9\u30eb\u30c0\uff08SELECT\u6587\uff09\u304c\u3042\u308b\u3068\u3057\u307e\u3057\u3087\u3046\u3002\u4e21\u30d5\u30a9\u30eb\u30c0\u306b\u306f\u4e00\u90e8\u540c\u3058\u540d\u524d\u306e\u30d5\u30a1\u30a4\u30eb\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u30921\u3064\u306e\u30d5\u30a9\u30eb\u30c0\u306b\u307e\u3068\u3081\u308b\u5834\u5408\u2026<\/p>\n
      \n
    • UNION\uff1a<\/strong>\u91cd\u8907\u3059\u308b\u30d5\u30a1\u30a4\u30eb\u306f1\u3064\u3060\u3051\u6b8b\u3057\u3066\u6574\u7406\uff08\u91cd\u8907\u524a\u9664\uff09<\/li>\n
    • UNION ALL\uff1a<\/strong>\u91cd\u8907\u304c\u3042\u3063\u3066\u3082\u3059\u3079\u3066\u6b8b\u3059\uff08\u3059\u3079\u3066\u3092\u78ba\u8a8d\uff09<\/li>\n<\/ul>\n
      \u3053\u306e\u3088\u3046\u306b\u3001\u300c\u6574\u7406\u3059\u308b\u304b\u300d\u300c\u5168\u90e8\u6b8b\u3059\u304b\u300d<\/strong>\u306e\u9055\u3044\u3092\u610f\u8b58\u3059\u308b\u3068\u3001\u8a66\u9a13\u3067\u3082\u76f4\u611f\u7684\u306b\u9078\u3079\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
      <\/p>\n
      UNION\uff0fUNION ALL\u304c\u51fa\u308b\u7a74\u57cb\u3081\u554f\u984c\u306e\u51fa\u984c\u50be\u5411\u2502SQL\u6587\u8108\u30d1\u30bf\u30fc\u30f3\u5225\u653b\u7565<\/h2>\n
      \u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u306e\u5348\u5f8c\u554f\u984c\u3067\u306f\u3001SELECT\u6587\u306e\u4e00\u90e8\u304c\u7a7a\u6b04<\/strong>\u306b\u306a\u3063\u3066\u304a\u308a\u3001\u300cUNION\u300d\u304b\u300cUNION ALL\u300d\u3092\u88dc\u3046\u5f62\u5f0f\u304c\u983b\u51fa\u3067\u3059\u3002\u3053\u306e\u3068\u304d\u554f\u308f\u308c\u308b\u306e\u306f\u3001\u300c\u3069\u3061\u3089\u3092\u9078\u3076\u3079\u304d\u304b<\/strong>\u300d\u3068\u3044\u3046\u5224\u65ad\u529b\u3068\u3001\u300c\u6587\u8108\u306e\u8aad\u89e3\u529b<\/strong>\u300d\u3067\u3059\u3002<\/p>\n
      \u25a0 \u51fa\u984c\u3055\u308c\u3084\u3059\u3044\u30d1\u30bf\u30fc\u30f3<\/h3>\n
        \n
      1. \u540c\u3058\u5217\u69cb\u6210\u306e2\u3064\u306eSELECT\u6587\u304c\u4e26\u3076<\/strong>
        \n\u2192 UNION\u7cfb\u3067\u7d71\u5408\u3055\u308c\u308b\u3002FROM<\/code>\u53e5\u306e\u30c6\u30fc\u30d6\u30eb\u540d\u3084WHERE<\/code>\u53e5\u306e\u6761\u4ef6\u304c\u7570\u306a\u308b\u5834\u5408\u306b\u6ce8\u610f\u3002<\/li>\n
      2. \u6700\u7d42\u7684\u306b\u91cd\u8907\u3092\u6392\u9664\u3059\u3079\u304d\u610f\u56f3\u304c\u8a18\u8ff0\u3067\u660e\u793a\u3055\u308c\u3066\u3044\u308b<\/strong>
        \n\u2192 \u300c\u540c\u3058\u30c7\u30fc\u30bf\u306f1\u3064\u306b\u307e\u3068\u3081\u308b\u5fc5\u8981\u304c\u3042\u308b\u300d\u306a\u3069\u3068\u66f8\u304b\u308c\u3066\u3044\u308b\u5834\u5408\u306f UNION<\/code>\u3002<\/li>\n
      3. \u91cd\u8907\u304c\u8a31\u5bb9\u30fb\u5fc5\u8981\u306a\u30b1\u30fc\u30b9<\/strong>
        \n\u2192 \u300c\u58f2\u4e0a\u30c7\u30fc\u30bf\u3092\u3059\u3079\u3066\u96c6\u8a08\u300d\u300c\u30ed\u30b0\u3092\u305d\u306e\u307e\u307e\u51fa\u529b\u300d\u306a\u3069\u306e\u8a18\u8ff0\u304c\u3042\u308b\u3068 UNION ALL<\/code>\u3002<\/li>\n<\/ol>\n
        \u25a0 SQL\u6587\u306e\u6587\u8108\u304b\u3089\u8aad\u307f\u53d6\u308b\u30dd\u30a4\u30f3\u30c8<\/h3>\n
        \u7a74\u57cb\u3081\u554f\u984c\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u6587\u8108\u30d2\u30f3\u30c8\u304c\u3088\u304f\u767b\u5834\u3057\u307e\u3059\u3002<\/p>\n
          \n
        • \u300c\u91cd\u8907\u3057\u306a\u3044\u3088\u3046\u306b\u2026\u300d\u300c1\u3064\u306b\u307e\u3068\u3081\u308b\u300d\u2192 UNION<\/strong><\/li>\n
        • \u300c\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u3092\u300d\u300c\u7d71\u5408\u30ed\u30b0\u3092\u51fa\u529b\u3059\u308b\u300d\u2192 UNION ALL<\/strong><\/li>\n
        • GROUP BY \u3084 COUNT(*) \u3092\u542b\u3080SELECT\u6587<\/strong>\u2192 \u3069\u3061\u3089\u3067\u3082\u3088\u3044\u304c\u3001UNION\u3060\u3068\u91cd\u8907\u304c\u9664\u304b\u308c\u3066\u4e8c\u91cd\u30ab\u30a6\u30f3\u30c8\u3092\u9632\u3052\u308b<\/li>\n<\/ul>\n
          \u25a0 \u8a66\u9a13\u3067\u72d9\u308f\u308c\u3084\u3059\u3044\u3072\u3063\u304b\u3051\u30dd\u30a4\u30f3\u30c8<\/h3>\n
            \n
          • SELECT\u53e5\u3060\u3051\u898b\u3066\u5b89\u6613\u306b\u5224\u65ad\u3059\u308b\u3068\u5931\u70b9<\/strong>\uff1a\u6587\u4e2d\u306e\u8981\u4ef6\u30fb\u6ce8\u91c8\u306b\u6ce8\u76ee<\/li>\n
          • UNION\u3068JOIN\u306e\u9078\u629e\u80a2\u304c\u6df7\u3056\u308b\u554f\u984c<\/strong>\uff1aJOIN\u306f\u884c\u306e\u6a2a\u7d50\u5408\u306a\u306e\u3067\u3001\u660e\u3089\u304b\u306b\u5217\u6570\u304c\u7570\u306a\u308c\u3070\u9664\u5916\u53ef\u80fd<\/li>\n
          • UNION ALL\u304c\u660e\u793a\u3055\u308c\u3066\u304a\u3089\u305a\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067UNION\u3068\u8aa4\u89e3\u3055\u305b\u308b<\/strong>\uff1aALL\u306e\u8a18\u8ff0\u304c\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f<\/li>\n<\/ul>\n
            \u25a0 \u7df4\u7fd2\u4f8b\uff08\u51fa\u984c\u30d1\u30bf\u30fc\u30f3\u3092\u60f3\u5b9a\uff09<\/h3>\n
            \n\uff08\u8a2d\u554f\uff09\n2\u3064\u306e\u58f2\u4e0a\u30c7\u30fc\u30bf\u8868\uff08sales_a, sales_b\uff09\u3092\u7d71\u5408\u3057\u3001\u91cd\u8907\u306e\u306a\u3044\u58f2\u4e0a\u4e00\u89a7\u3092\u53d6\u5f97\u3057\u305f\u3044\u3002\n\u4ee5\u4e0b\u306e\uff08\u3000\u3000\u3000\uff09\u306b\u9069\u5207\u306aSQL\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u88dc\u3048\u3002\n\nSELECT product_id, amount FROM sales_a\n\uff08\u3000\u3000\u3000\uff09\nSELECT product_id, amount FROM sales_b;\n\n\u2192 \u89e3\u7b54\uff1aUNION\n<\/code><\/pre>\n
            \u3053\u306e\u3088\u3046\u306b\u3001\u8a2d\u554f\u4e2d\u306e\u300c\u91cd\u8907\u3057\u306a\u3044\u3088\u3046\u306b\u300d\u304c\u30ad\u30fc\u30ef\u30fc\u30c9<\/strong>\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
            UNION\uff0fUNION ALL\u3068JOIN\u306e\u9055\u3044\u2502\u7e26\u3068\u6a2a\u306e\u7d50\u5408\u306e\u672c\u8cea\u7684\u306a\u9055\u3044\u3092\u56f3\u89e3<\/h2>\n
            SQL\u3067\u300c\u30c7\u30fc\u30bf\u3092\u7d50\u5408\u3059\u308b\u300d\u3068\u805e\u304f\u3068\u3001\u591a\u304f\u306e\u4eba\u304c\u307e\u305a\u601d\u3044\u6d6e\u304b\u3079\u308b\u306e\u304c\u300cJOIN\u300d\u3067\u3059\u3002\u3057\u304b\u3057\u300cUNION\u300d\u3084\u300cUNION ALL\u300d\u3082\u7d50\u5408\u306b\u4f7f\u308f\u308c\u308b\u69cb\u6587\u3067\u3059\u3002\u6df7\u540c\u3057\u3084\u3059\u3044\u3053\u306e2\u7cfb\u7d71\u306e\u9055\u3044\u3092\u6b63\u3057\u304f\u7406\u89e3\u3059\u308b\u306b\u306f\u3001\u201c\u7e26\u306b\u7d71\u5408\u3059\u308b\u304b\u3001\u6a2a\u306b\u7d50\u5408\u3059\u308b\u304b\u201d<\/strong>\u3068\u3044\u3046\u767a\u60f3\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n
            \u25a0 \u51e6\u7406\u306e\u65b9\u5411\uff1aUNION\u7cfb\u306f\u201c\u7e26\u201d\u3001JOIN\u306f\u201c\u6a2a\u201d<\/h3>\n
            UNION\uff0fUNION ALL \u306f\u300cSELECT\u6587\u306e\u7d50\u679c\uff08\u884c\uff09\u300d\u3092\u7e26\u306b\u7a4d\u307f\u91cd\u306d\u308b<\/strong>\u51e6\u7406\u3067\u3059\u3002\u4e00\u65b9\u3001JOIN\u306f\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u30ad\u30fc\u3092\u4f7f\u3063\u3066\u6a2a\u306b\u7d50\u3073\u3064\u3051\u308b<\/strong>\u51e6\u7406\u3067\u3059\u3002<\/p>\n
            \u25a0 \u56f3\u89e3\uff1aUNION\u3068JOIN\u306e\u69cb\u9020\u7684\u9055\u3044<\/h3>\n
            \"\"<\/p>\n
             <\/p>\n
            \u25a0 \u8868\u3067\u6bd4\u8f03\uff1aUNION\u7cfb vs JOIN<\/h3>\n\n\n\n\n\n\n\n\n\n
            \u9805\u76ee<\/th>\nUNION\uff0fUNION ALL<\/th>\nJOIN<\/th>\n<\/tr>\n<\/thead>\n
            \u51e6\u7406\u65b9\u5411<\/td>\n\u7e26\u65b9\u5411\u306b\u884c\u3092\u7d71\u5408<\/td>\n\u6a2a\u65b9\u5411\u306b\u5217\u3092\u7d50\u5408<\/td>\n<\/tr>\n
            \u7d50\u5408\u6761\u4ef6<\/td>\n\u4e0d\u8981\uff08\u5217\u6570\u3068\u30c7\u30fc\u30bf\u578b\u304c\u4e00\u81f4\u3059\u308c\u3070OK\uff09<\/td>\n\u5fc5\u8981\uff08\u4e3b\u30ad\u30fc\u3084\u5916\u90e8\u30ad\u30fc\u306e\u5bfe\u5fdc\uff09<\/td>\n<\/tr>\n
            \u524d\u63d0\u3068\u306a\u308b\u5217\u6570<\/td>\n\u5404SELECT\u6587\u306e\u5217\u6570\u30fb\u30c7\u30fc\u30bf\u578b\u304c\u4e00\u81f4<\/td>\n\u4e00\u81f4\u3057\u3066\u3044\u308b\u5fc5\u8981\u306f\u306a\u3044\uff08JOIN\u6761\u4ef6\u3067\u5408\u308f\u305b\u308b\uff09<\/td>\n<\/tr>\n
            \u5178\u578b\u7684\u306a\u7528\u9014<\/td>\n\u30ed\u30b0\u3084\u58f2\u4e0a\u30c7\u30fc\u30bf\u306e\u7d71\u5408<\/td>\n\u9867\u5ba2\u60c5\u5831\u3068\u6ce8\u6587\u60c5\u5831\u306e\u7d50\u5408\u306a\u3069<\/td>\n<\/tr>\n
            \u8a66\u9a13\u3067\u306e\u72d9\u308f\u308c\u65b9<\/td>\nUNION\u3068UNION ALL\u306e\u9078\u629e\u80a2\u306b\u6ce8\u610f<\/td>\nON\u6761\u4ef6\u3084INNER\/LEFT\u306e\u4f7f\u3044\u5206\u3051\u3092\u554f\u308f\u308c\u308b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            \u25a0 \u8a66\u9a13\u3067\u306e\u3072\u3063\u304b\u3051\u30d1\u30bf\u30fc\u30f3\u306b\u6ce8\u610f<\/h3>\n
            JOIN\u306f\u300c\u6a2a\u65b9\u5411\u306e\u7d50\u5408\u300d\u3067\u3042\u308a\u3001\u5217\u306e\u6570\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u5217\u3092\u7d50\u5408\u6761\u4ef6\uff08ON\u53e5\u306a\u3069\uff09\u306b\u57fa\u3065\u3044\u3066\u6a2a\u306b\u4e26\u3079\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002
            \n\u4e00\u65b9\u3001UNION\u306f\u300c\u7e26\u65b9\u5411\u306e\u7d50\u5408\u300d\u3067\u3042\u308a\u3001\u8907\u6570\u306eSELECT\u6587\u3092\u7a4d\u307f\u4e0a\u3052\u308b\u305f\u3081\u3001\u5217\u6570\u3084\u30c7\u30fc\u30bf\u578b\u304c\u4e00\u81f4\u3057\u3066\u3044\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002
            \n\u5348\u5f8c\u8a66\u9a13\u3067\u306f\u3001\u3053\u306e\u9055\u3044\u3092\u5229\u7528\u3057\u3066\u300c\u8907\u6570\u306eSELECT\u6587\u304c\u540c\u3058\u5217\u69cb\u6210\u300d\uff1dUNION \u3067\u3042\u308b\u3079\u304d\u3068\u3053\u308d\u3092\u3001\u3042\u3048\u3066JOIN\u3068\u8aa4\u8a8d\u3055\u305b\u308b\u9078\u629e\u80a2\u304c\u6df7\u305c\u3089\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059<\/strong>\u3002\u3053\u306e\u6027\u8cea\u3092\u7406\u89e3\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u304c\u3001\u9078\u629e\u80a2\u3092\u898b\u6975\u3081\u308b\u30ab\u30ae\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
            \u25a0 \u8eab\u8fd1\u306a\u4f8b\u3048\uff1aJOIN\u306f\u300c\u540d\u7c3f\u3092\u7167\u3089\u3057\u5408\u308f\u305b\u308b\u300d\u3001UNION\u306f\u300c\u540d\u7c3f\u3092\u307e\u3068\u3081\u308b\u300d<\/h3>\n
              \n
            • JOIN\uff1a<\/strong>\u30af\u30e9\u30b9\u540d\u7c3f\u3068\u6210\u7e3e\u8868\u3092\u7167\u3089\u3057\u5408\u308f\u305b\u3066\u30011\u4eba\u305a\u3064\u8a73\u7d30\u3092\u7d10\u3065\u3051\u308b<\/li>\n
            • UNION\uff1a<\/strong>1\u7d44\u30682\u7d44\u306e\u540d\u7c3f\u30921\u3064\u306b\u7d71\u5408\u3059\u308b\uff08\u91cd\u8907\u304c\u3042\u308c\u3070UNION\uff0f\u3059\u3079\u3066\u6b8b\u3059\u306a\u3089UNION ALL\uff09<\/li>\n<\/ul>\n
              JOIN\u306f\u300c\u95a2\u4fc2\u6027\u306e\u7167\u5408\u300d\u3001UNION\u306f\u300c\u5168\u4f53\u306e\u62e1\u5f35\u300d\u3068\u6349\u3048\u308b\u3068\u899a\u3048\u3084\u3059\u3044\u3067\u3059\u3002<\/p>\n
              UNION\uff0fUNION ALL\u3068\u4f75\u7528\u3055\u308c\u308bSQL\u30ad\u30fc\u30ef\u30fc\u30c9\u4e00\u89a7\u2502GROUP BY\u30fbORDER BY\u30fbDISTINCT\u306a\u3069<\/h2>\n
              SQL\u306e\u69cb\u6587\u306f\u8907\u6570\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u308f\u308c\u308b\u3053\u3068\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u300cUNION\u300d\u3084\u300cUNION ALL\u300d\u3082\u4f8b\u5916\u3067\u306f\u306a\u304f\u3001GROUP BY\u30fbORDER BY\u30fbDISTINCT\u30fbLIMIT<\/strong>\u306a\u3069\u3068\u4f75\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u3053\u308c\u3089\u306e\u7d44\u307f\u5408\u308f\u305b\u304c\u5348\u5f8c\u8a66\u9a13\u3067\u3082\u554f\u308f\u308c\u307e\u3059\u3002<\/p>\n
              \u25a0 \u3088\u304f\u4f75\u7528\u3055\u308c\u308bSQL\u30ad\u30fc\u30ef\u30fc\u30c9\u3068\u305d\u306e\u5f79\u5272<\/h3>\n\n\n\n\n\n\n\n\n
              \u30ad\u30fc\u30ef\u30fc\u30c9<\/th>\n\u4e3b\u306a\u5f79\u5272<\/th>\nUNION\u7cfb\u3068\u306e\u95a2\u4fc2<\/th>\n<\/tr>\n<\/thead>\n
              GROUP BY<\/td>\n\u96c6\u8a08\u30fb\u30b0\u30eb\u30fc\u30d7\u5316<\/td>\nUNION\u524d\u5f8c\u3069\u3061\u3089\u306b\u3082\u4f7f\u3048\u308b\u3002
              \n\u305f\u3060\u3057\u7d71\u5408\u7d50\u679c\u3092\u3055\u3089\u306b\u96c6\u8a08\u3059\u308b\u5834\u5408\u306fUNION\u5f8c\u306b\u4f7f\u7528\u3002<\/td>\n<\/tr>\n
              ORDER BY<\/td>\n\u4e26\u3073\u66ff\u3048<\/td>\nUNION\u5168\u4f53\u306b\u9069\u7528\u3059\u308b\u5834\u5408\u3001\u6700\u5f8c\u306eSELECT\u6587\u306e\u5f8c\u306b1\u56de\u3060\u3051\u4f7f\u7528\u3059\u308b\u3002<\/td>\n<\/tr>\n
              DISTINCT<\/td>\n\u91cd\u8907\u884c\u306e\u9664\u5916<\/td>\nUNION\u81ea\u4f53\u304c\u91cd\u8907\u3092\u9664\u304f\u306e\u3067\u3001\u4f75\u7528\u3059\u308b\u3068\u7121\u99c4\u307e\u305f\u306f\u8aa4\u89e3\u306e\u539f\u56e0\u306b\u3002<\/td>\n<\/tr>\n
              LIMIT<\/td>\n\u8868\u793a\u4ef6\u6570\u306e\u5236\u9650<\/td>\nUNION\u5168\u4f53\u3067\u4f55\u4ef6\u53d6\u5f97\u3059\u308b\u304b\u306e\u5236\u5fa1\u306b\u4f7f\u3048\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
              \u25a0 \u8a66\u9a13\u3067\u72d9\u308f\u308c\u3084\u3059\u3044\u7d44\u307f\u5408\u308f\u305b\u3068\u6ce8\u610f\u70b9<\/h3>\n
                \n
              • ORDER BY\u306e\u4f4d\u7f6e<\/strong>\uff1aUNION\u306e\u305d\u308c\u305e\u308c\u306eSELECT\u6587\u306bORDER BY\u3092\u3064\u3051\u3066\u306f\u3044\u3051\u306a\u3044\uff08\u69cb\u6587\u30a8\u30e9\u30fc\uff09<\/li>\n
              • DISTINCT\u306e\u91cd\u8907\u6392\u9664\u3068UNION\u306e\u6df7\u540c<\/strong>\uff1a\u300cUNION DISTINCT\u300d\u306a\u3069\u306e\u8868\u8a18\u306f\u5b58\u5728\u3057\u306a\u3044\u3002UNION\u306f\u5e38\u306b\u91cd\u8907\u9664\u53bb<\/li>\n
              • GROUP BY\u3068UNION\u306e\u9806\u5e8f<\/strong>\uff1a\u500b\u5225\u306b\u96c6\u8a08\u3059\u308b\u304b\u3001\u7d71\u5408\u5f8c\u306b\u96c6\u8a08\u3059\u308b\u304b\u3067\u610f\u56f3\u304c\u5909\u308f\u308b<\/li>\n<\/ul>\n
                \u25a0 \u4f8b\uff1aORDER BY\u306f\u6700\u5f8c\u306b1\u56de\u3060\u3051<\/h3>\n
                \nSELECT name FROM customers\nUNION\nSELECT name FROM suppliers\nORDER BY name;\n<\/code><\/pre>\n
                \u3053\u306e\u3088\u3046\u306b\u3001ORDER BY\u306fUNION\u69cb\u6587\u306e\u6700\u5f8c\u306b\u8a18\u8ff0\u3059\u308b<\/strong>\u306e\u304c\u6b63\u89e3\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306eSQL\u69cb\u6587\u306b\u304a\u3044\u3066\u3001\u300cUNION\u300d\u3068\u300cUNION ALL\u300d\u306f\u201c\u30c7\u30fc\u30bf\u306e\u7d71\u5408\u201d\u3092\u884c\u3046\u91cd\u8981\u306a\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u3059\u3002\u7279\u306b\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u306e\u5348\u5f8c\u554f\u984c\u3067\u306f\u3001\u7a74\u57cb\u3081\u5f62\u5f0f\u3067 … <\/p>\n","protected":false},"author":2,"featured_media":5467,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","columnck":"","stmeta_robots":"index, follow","st_titlewords":"","st_title_extra":"","st_keywords":"","st_description":"","st_display_ad_mark":"","st_display_ad_mark_hide":"","textcopyck":"","st_copyright":"","st_copyurl":"","eyecatch_set":"","st_youtube_url":"","st_youtube_eyecatch":"","headerwidget_set":"","updatewidget_set":"","kanrenwidget_set":"","ikkatuwidget_set":"","koukoku_set":"","auto_adsense_koukoku_set":"","st_redirect":"","st_redirect_url_as_canonical":"","st_redirect_pvm_do_not_track":"","post_data_updatewidget_set":"","st_post_header_under_bg":"","st_twitter_tag":"","affinger_note":"","rankdisplayck":"","st_head_code":"","st_footer_code":"","st_post_header_under_code":"","_st_toc_override":false,"_st_toc_settings":[]},"categories":[3],"tags":[6],"class_list":["post-5442","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ipa","tag-6"],"_links":{"self":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/posts\/5442","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/comments?post=5442"}],"version-history":[{"count":0,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/posts\/5442\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/media\/5467"}],"wp:attachment":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/media?parent=5442"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/categories?post=5442"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/tags?post=5442"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}