{"id":5447,"date":"2025-07-30T01:19:51","date_gmt":"2025-07-29T16:19:51","guid":{"rendered":"https:\/\/sky-peace.net\/?p=5447"},"modified":"2025-07-30T01:19:51","modified_gmt":"2025-07-29T16:19:51","slug":"db-window","status":"publish","type":"post","link":"https:\/\/sky-peace.net\/certified\/db-window\/","title":{"rendered":"\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3068\u306f\uff1fSQL\u8a66\u9a13\u3067\u5dee\u304c\u3064\u304fGROUP BY\u3068\u306e\u9055\u3044\u3068\u51fa\u984c\u5bfe\u7b56"},"content":{"rendered":"

\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u3084\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u306e\u5348\u5f8c\u554f\u984c\u3067\u983b\u51fa\u306e\u300c\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u300d\u3002SQL\u306e\u4e0a\u7d1a\u8005\u5411\u3051\u6a5f\u80fd\u3067\u3042\u308a\u306a\u304c\u3089\u3001\u300c\u305d\u3082\u305d\u3082\u4f55\u304c\u201c\u30a6\u30a3\u30f3\u30c9\u30a6\u201d\u306a\u306e\uff1f\u300d\u300cGROUP BY\u3068\u306e\u9055\u3044\u304c\u3044\u307e\u3044\u3061\u5206\u304b\u3089\u306a\u3044\u300d\u3068\u611f\u3058\u308b\u65b9\u3082\u591a\u3044\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n

\u5b9f\u52d9\u3067\u306f\u58f2\u4e0a\u30e9\u30f3\u30ad\u30f3\u30b0\u306e\u8a08\u7b97\u3084\u7d2f\u7a4d\u5024\u306e\u96c6\u8a08\u3001\u4eba\u4e8b\u8a55\u4fa1\u306e\u4e26\u3073\u66ff\u3048\u306a\u3069\u3001\u30c7\u30fc\u30bf\u306e\u201c\u90e8\u5206\u7684\u306a\u96c6\u8a08\u201d\u304c\u5fc5\u8981\u306a\u5834\u9762\u3067\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306f\u975e\u5e38\u306b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u306b\u306a\u308a\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u305d\u306e\u300c\u76f4\u611f\u7684\u306b\u5206\u304b\u308a\u306b\u304f\u3044\u6982\u5ff5\u6027\u300d\u304c\u3001\u5b66\u7fd2\u306e\u30cf\u30fc\u30c9\u30eb\u3092\u4e0a\u3052\u3066\u3044\u308b\u306e\u3082\u4e8b\u5b9f\u3067\u3059\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3068\u306f\u4f55\u304b\u3001\u306a\u305c\u201c\u30a6\u30a3\u30f3\u30c9\u30a6\u201d\u3068\u3044\u3046\u540d\u524d\u304c\u3064\u3044\u3066\u3044\u308b\u306e\u304b\u3068\u3044\u3063\u305f\u8a9e\u6e90\u30fb\u6982\u5ff5\u306e\u7406\u89e3\u304b\u3089<\/strong>\u59cb\u3081\u3001\u8a66\u9a13\u3067\u72d9\u308f\u308c\u3084\u3059\u3044\u51fa\u984c\u30d1\u30bf\u30fc\u30f3\u3084\u3088\u304f\u3042\u308b\u5f15\u3063\u304b\u3051\u30dd\u30a4\u30f3\u30c8<\/strong>\u307e\u3067\u3092\u3001\u56f3\u89e3\u30fb\u5177\u4f53\u4f8b\u30fb\u6bd4\u55a9<\/strong>\u3092\u4ea4\u3048\u3066\u4f53\u7cfb\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n

PARTITION BY \u3068 GROUP BY \u306e\u6df7\u540c\u3092\u89e3\u304d\u307b\u3050\u3057\u306a\u304c\u3089\u3001\u300c\u306a\u305c\u305d\u308c\u304c\u5fc5\u8981\u306a\u306e\u304b\u300d\u307e\u3067\u8179\u843d\u3061\u3055\u305b\u308b\u3053\u3068\u3092\u76ee\u6307\u3057\u307e\u3059\u3002<\/p>\n

\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306e\u8a9e\u6e90\u3068\u57fa\u672c\u6982\u5ff5\u2502\u306a\u305c\u201c\u30a6\u30a3\u30f3\u30c9\u30a6\u201d\u306a\u306e\u304b\u3092\u56f3\u89e3\u3067\u7406\u89e3\u3059\u308b<\/h2>\n

SQL\u306b\u304a\u3051\u308b\u300c\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u300d\u3068\u306f\u3001\u884c\u3054\u3068\u306e\u8a08\u7b97\u306b\u304a\u3044\u3066\u201c\u96c6\u8a08\u306e\u67a0\uff08\u30a6\u30a3\u30f3\u30c9\u30a6\uff09\u201d\u3092\u6307\u5b9a\u3057\u3066\u51e6\u7406\u3092\u884c\u3046\u95a2\u6570<\/strong>\u306e\u3053\u3068\u3067\u3059\u3002
\n\u4f8b\u3048\u3070\u300c\u5404\u90e8\u7f72\u3054\u3068\u306e\u7d66\u4e0e\u9806\u4f4d\u300d\u3084\u300c\u5404\u6708\u3054\u3068\u306e\u7d2f\u7a4d\u58f2\u4e0a\u300d\u306a\u3069\u3001\u5168\u4f53\u3067\u306f\u306a\u304f\u201c\u3042\u308b\u7bc4\u56f2\u5185\u201d\u3067\u306e\u96c6\u8a08<\/strong>\u3092\u884c\u3044\u305f\u3044\u3068\u304d\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n

🔍 \u306a\u305c\u300c\u30a6\u30a3\u30f3\u30c9\u30a6\u300d\u306a\u306e\u304b\uff1f<\/h3>\n

\u201c\u30a6\u30a3\u30f3\u30c9\u30a6\uff08window\uff09\u201d\u3068\u306f\u3001\u65e5\u672c\u8a9e\u3067\u8a00\u3046\u300c\u7a93\u300d\u3067\u306f\u306a\u304f\u3001\u300c\u7bc4\u56f2\u300d\u300c\u67a0\u7d44\u307f\u300d<\/strong>\u306e\u610f\u5473\u3067\u3059\u3002
\n\u3064\u307e\u308a\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306f\u300c\u3042\u308b\u7bc4\u56f2\uff08\u67a0\uff09\u3092\u5b9a\u7fa9\u3057\u3001\u305d\u306e\u4e2d\u3067\u96c6\u8a08\u30fb\u9806\u4f4d\u4ed8\u3051\u306a\u3069\u3092\u884c\u3046\u300d\u6a5f\u80fd\u306a\u306e\u3067\u3059\u3002<\/p>\n

📊 \u56f3\u89e3\uff1a\u901a\u5e38\u306e\u96c6\u8a08 vs \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570<\/h3>\n\n\n\n\n\n\n\n
ID<\/th>\n\u90e8\u7f72<\/th>\n\u7d66\u4e0e<\/th>\n\u90e8\u7f72\u5185\u9806\u4f4d\uff08\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\uff09<\/th>\n<\/tr>\n
1<\/td>\n\u55b6\u696d<\/td>\n300<\/td>\n2<\/td>\n<\/tr>\n
2<\/td>\n\u55b6\u696d<\/td>\n500<\/td>\n1<\/td>\n<\/tr>\n
3<\/td>\n\u7dcf\u52d9<\/td>\n280<\/td>\n2<\/td>\n<\/tr>\n
4<\/td>\n\u7dcf\u52d9<\/td>\n340<\/td>\n1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u2192 \u3053\u308c\u306f RANK() OVER (PARTITION BY \u90e8\u7f72 ORDER BY \u7d66\u4e0e DESC)<\/code> \u306b\u3088\u3063\u3066\u3001\u90e8\u7f72\u3054\u3068\u306b\u7d66\u4e0e\u3092\u4e26\u3073\u66ff\u3048\u305f\u4f8b<\/strong>\u3067\u3059\u3002
\nGROUP BY \u3067\u306f\u300c\u55b6\u696d\u300d\u300c\u7dcf\u52d9\u300d\u305d\u308c\u305e\u308c1\u884c\u306b\u3057\u304b\u306a\u3089\u305a\u3001\u3053\u306e\u3088\u3046\u306a\u884c\u5358\u4f4d\u306e\u60c5\u5831\u4fdd\u6301\u3068\u96c6\u8a08\u306e\u4f75\u7528\u306f\u3067\u304d\u307e\u305b\u3093<\/strong>\u3002<\/p>\n

💡 \u3053\u3053\u3067\u8ffd\u52a0\u8cea\u554f\uff1a<\/h3>\n

\u300cGROUP BY \u3067\u3082\u96c6\u8a08\u3067\u304d\u308b\u306a\u3089\u3001\u306a\u305c\u308f\u3056\u308f\u3056\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3092\u4f7f\u3046\u306e\uff1f\u300d
\n\u6b21\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3053\u306e\u7591\u554f\u3092\u89e3\u6c7a\u3057\u307e\u3059\uff01<\/p><\/blockquote>\n

GROUP BY\u3068\u306e\u9055\u3044\u3068PARTITION BY\u306e\u610f\u5473\u2502\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306e\u201c\u90e8\u5206\u96c6\u8a08\u201d\u3092\u76f4\u611f\u7684\u306b\u7406\u89e3\u3059\u308b<\/h2>\n

SQL\u521d\u5b66\u8005\u304c\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3067\u6700\u3082\u6df7\u4e71\u3057\u3084\u3059\u3044\u306e\u304c\u3001\u300cGROUP BY\u3068\u3069\u3046\u9055\u3046\u306e\uff1f\u300d<\/strong>\u3068\u3044\u3046\u70b9\u3067\u3059\u3002
\n\u7d50\u8ad6\u304b\u3089\u8a00\u3048\u3070\u3001GROUP BY\u306f\u201c\u884c\u3092\u307e\u3068\u3081\u308b\u201d\u96c6\u8a08<\/strong>\u3001PARTITION BY\u306f\u201c\u307e\u3068\u3081\u305a\u306b\u3001\u7bc4\u56f2\u3092\u6307\u5b9a\u3057\u3066\u96c6\u8a08\u201d\u3059\u308b\u6a5f\u80fd<\/strong>\u3067\u3059\u3002<\/p>\n

🧠 \u6bd4\u55a9\u3067\u7406\u89e3\uff1a\u300cGROUP BY\u306f\u96c6\u56e3\u5199\u771f\u3001PARTITION BY\u306f\u540d\u7c3f\u306e\u6a2a\u306b\u30e1\u30e2\u300d<\/h3>\n
    \n
  • GROUP BY<\/strong>\uff1a\u5404\u90e8\u7f72\u306e\u4ee3\u8868\u30921\u4eba\u305a\u3064\u4e26\u3079\u3066\u3001\u96c6\u5408\u5199\u771f\u3092\u64ae\u308b \u2192\u300c1\u90e8\u7f72\uff1d1\u884c\u300d\u306e\u30c7\u30fc\u30bf\u306b\u306a\u308b<\/li>\n
  • PARTITION BY<\/strong>\uff1a\u5168\u793e\u54e1\u304c\u540d\u7c3f\u306b\u4e26\u3093\u3060\u307e\u307e\u3001\u6a2a\u306b\u300c\u3053\u306e\u4eba\u306f\u90e8\u7f72\u5185\u3067\u4f55\u4f4d\u300d\u306a\u3069\u30e1\u30e2\u3092\u66f8\u304d\u52a0\u3048\u308b \u2192 \u884c\u6570\u306f\u305d\u306e\u307e\u307e\uff01<\/li>\n<\/ul>\n

    🔍 \u5b9f\u4f8b\u6bd4\u8f03\uff1aGROUP BY vs \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570<\/h3>\n

    \u30c6\u30fc\u30d6\u30eb\u4f8b\uff08\u793e\u54e1\u30c7\u30fc\u30bf\uff09<\/h4>\n\n\n\n\n\n\n\n
    ID<\/th>\n\u90e8\u7f72<\/th>\n\u7d66\u4e0e<\/th>\n<\/tr>\n
    1<\/td>\n\u55b6\u696d<\/td>\n300<\/td>\n<\/tr>\n
    2<\/td>\n\u55b6\u696d<\/td>\n500<\/td>\n<\/tr>\n
    3<\/td>\n\u7dcf\u52d9<\/td>\n280<\/td>\n<\/tr>\n
    4<\/td>\n\u7dcf\u52d9<\/td>\n340<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    📌 GROUP BY \u3092\u4f7f\u3063\u305f\u5834\u5408<\/h4>\n
    SELECT \u90e8\u7f72, AVG(\u7d66\u4e0e) FROM \u793e\u54e1 GROUP BY \u90e8\u7f72;<\/code><\/pre>\n\n\n\n\n\n
    \u90e8\u7f72<\/th>\n\u5e73\u5747\u7d66\u4e0e<\/th>\n<\/tr>\n
    \u55b6\u696d<\/td>\n400<\/td>\n<\/tr>\n
    \u7dcf\u52d9<\/td>\n310<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u2192 \u300c\u90e8\u7f72\u3054\u3068\u306b\u96c6\u8a08\u300d\u3057\u3066\u3001\u884c\u6570\u304c\u90e8\u7f72\u6570\u306b\u6e1b\u308b<\/strong><\/p>\n
    📌 \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\uff08PARTITION BY\uff09\u3092\u4f7f\u3063\u305f\u5834\u5408<\/h4>\n
    SELECT *, AVG(\u7d66\u4e0e) OVER (PARTITION BY \u90e8\u7f72) AS \u90e8\u7f72\u5225\u5e73\u5747\nFROM \u793e\u54e1;<\/code><\/pre>\n\n\n\n\n\n\n\n
    ID<\/th>\n\u90e8\u7f72<\/th>\n\u7d66\u4e0e<\/th>\n\u90e8\u7f72\u5225\u5e73\u5747<\/th>\n<\/tr>\n
    1<\/td>\n\u55b6\u696d<\/td>\n300<\/td>\n400<\/td>\n<\/tr>\n
    2<\/td>\n\u55b6\u696d<\/td>\n500<\/td>\n400<\/td>\n<\/tr>\n
    3<\/td>\n\u7dcf\u52d9<\/td>\n280<\/td>\n310<\/td>\n<\/tr>\n
    4<\/td>\n\u7dcf\u52d9<\/td>\n340<\/td>\n310<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u2192 \u884c\u6570\u306f\u5909\u308f\u3089\u305a\u3001\u96c6\u8a08\u7d50\u679c\u3092\u201c\u8ffd\u52a0\u60c5\u5831\u3068\u3057\u3066\u6a2a\u306b\u8cbc\u308b\u201d<\/strong>\u306e\u304c\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306e\u7279\u5fb4\u3067\u3059\u3002<\/p>\n
    ✔ POINT\uff1aGROUP BY\u3068PARTITION BY\u306e\u9055\u3044\u307e\u3068\u3081\u8868<\/h3>\n\n\n\n\n\n\n
    \u6bd4\u8f03\u8ef8<\/th>\nGROUP BY<\/th>\nPARTITION BY\uff08\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\uff09<\/th>\n<\/tr>\n
    \u884c\u6570<\/td>\n\u6e1b\u308b\uff08\u30b0\u30eb\u30fc\u30d7\u5358\u4f4d\u306b\u306a\u308b\uff09<\/td>\n\u5909\u308f\u3089\u306a\u3044\uff08\u5168\u884c\u3092\u4fdd\u6301\uff09<\/td>\n<\/tr>\n
    \u8868\u793a\u3067\u304d\u308b\u5217<\/td>\nGROUP\u5217\u304b\u96c6\u8a08\u5217\u306e\u307f<\/td>\n\u3059\u3079\u3066\u306e\u5217\u3092\u305d\u306e\u307e\u307e\u8868\u793a\u53ef\u80fd<\/td>\n<\/tr>\n
    \u7528\u9014<\/td>\n\u30b0\u30eb\u30fc\u30d7\u3054\u3068\u306e\u96c6\u8a08<\/td>\n\u884c\u5358\u4f4d\u306e\u96c6\u8a08\uff0b\u5143\u306e\u60c5\u5831\u306e\u540c\u6642\u8868\u793a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306e\u4f7f\u3044\u3069\u3053\u308d\u3068NG\u4f8b\u2502\u8a66\u9a13\u3084\u5b9f\u52d9\u3067\u4f7f\u308f\u308c\u308b\u30d1\u30bf\u30fc\u30f3\u3068\u907f\u3051\u308b\u3079\u304d\u30b1\u30fc\u30b9<\/h2>\n
    \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306f\u975e\u5e38\u306b\u67d4\u8edf\u306a\u6a5f\u80fd\u3067\u3059\u304c\u3001\u300c\u4f55\u3067\u3082\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3067\u6e08\u307e\u305b\u308c\u3070\u3044\u3044\u300d\u3068\u3044\u3046\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002
    \n\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u304f\u4f7f\u308f\u308c\u308b\u4ee3\u8868\u7684\u306a\u5834\u9762<\/strong>\u3068\u3001\u9006\u306b\u4f7f\u308f\u306a\u3044\u65b9\u304c\u9069\u5207\u306a\u30b1\u30fc\u30b9<\/strong>\u3092\u30bb\u30c3\u30c8\u3067\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n
    ✅ \u3088\u304f\u4f7f\u308f\u308c\u308b\u30b7\u30fc\u30f3\uff08\u8a66\u9a13\u306b\u3082\u983b\u51fa\uff09<\/h3>\n\n\n\n\n\n\n\n
    \u30b7\u30fc\u30f3<\/th>\n\u5185\u5bb9<\/th>\n\u5177\u4f53\u4f8b<\/th>\n<\/tr>\n
    \u30e9\u30f3\u30ad\u30f3\u30b0\u4ed8\u3051<\/td>\n\u540c\u9806\u4f4d\u306e\u6271\u3044\u3084\u884c\u3054\u3068\u306e\u9806\u4f4d\u8868\u793a\u304c\u5fc5\u8981<\/td>\nRANK()<\/code> \/ ROW_NUMBER()<\/code><\/td>\n<\/tr>\n
    \u7d2f\u7a4d\u96c6\u8a08<\/td>\n\u65e5\u5225\u30fb\u6708\u5225\u306b\u7a4d\u307f\u4e0a\u3052\u3066\u3044\u304f\u30c7\u30fc\u30bf\u51e6\u7406<\/td>\nSUM() OVER (ORDER BY \u65e5\u4ed8)<\/code><\/td>\n<\/tr>\n
    \u90e8\u5206\u5e73\u5747<\/td>\n\u30ab\u30c6\u30b4\u30ea\u3054\u3068\u306b\u5e73\u5747\u30fb\u6700\u5927\u30fb\u6700\u5c0f\u3092\u51fa\u3059<\/td>\nAVG() OVER (PARTITION BY \u30ab\u30c6\u30b4\u30ea)<\/code><\/td>\n<\/tr>\n
    \u524d\u5f8c\u6bd4\u8f03<\/td>\n\u524d\u6708\u6bd4\u30fb\u524d\u5e74\u5dee\u5206\u306a\u3069<\/td>\nLAG()<\/code> \/ LEAD()<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    🔍 \u8a66\u9a13\u306b\u51fa\u3084\u3059\u3044\u7d44\u307f\u5408\u308f\u305b\u30d1\u30bf\u30fc\u30f3<\/h3>\n
      \n
    • PARTITION BY \uff0b ORDER BY<\/strong>\uff1a\u96c6\u8a08\u5bfe\u8c61\u3068\u4e26\u3073\u9806\u3092\u660e\u793a<\/li>\n
    • RANK vs ROW_NUMBER<\/strong>\uff1a\u540c\u5024\u306e\u6271\u3044\u3067\u7d50\u679c\u304c\u7570\u306a\u308b<\/li>\n
    • LAG\/LEAD \u306e OFFSET<\/strong>\uff1a\u524d\u884c\u30fb\u5f8c\u884c\u304c\u5b58\u5728\u3057\u306a\u3044\u3068\u304d\u306e NULL \u51e6\u7406\u304c\u554f\u308f\u308c\u308b<\/li>\n<\/ul>\n
      ⚠ \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3092\u907f\u3051\u305f\u65b9\u304c\u3044\u3044\u30b1\u30fc\u30b9<\/h3>\n\n\n\n\n\n\n
      \u30b1\u30fc\u30b9<\/th>\n\u7406\u7531<\/th>\n\u4ee3\u66ff\u6848<\/th>\n<\/tr>\n
      \u30c7\u30fc\u30bf\u4ef6\u6570\u304c\u81a8\u5927<\/td>\n\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306f\u91cd\u3044\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u60aa\u5316<\/td>\n\u30b5\u30de\u30ea\u30c6\u30fc\u30d6\u30eb or \u4e00\u6642\u30c6\u30fc\u30d6\u30eb<\/td>\n<\/tr>\n
      \u30b7\u30f3\u30d7\u30eb\u306a\u5408\u8a08\u3060\u3051\u3067\u3088\u3044<\/td>\nGROUP BY \u306e\u65b9\u304c\u8aad\u307f\u3084\u3059\u304f\u8efd\u3044<\/td>\n\u901a\u5e38\u306e GROUP BY<\/td>\n<\/tr>\n
      \u30c7\u30fc\u30bf\u7d50\u5408\uff08JOIN\uff09\u3092\u512a\u5148\u3059\u3079\u304d\u3068\u304d<\/td>\n\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3088\u308a JOIN \u306e\u65b9\u304c\u610f\u5473\u304c\u660e\u78ba<\/td>\n\u30b5\u30d6\u30af\u30a8\u30ea + JOIN<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      💡 POINT\uff1a\u8a66\u9a13\u3067\u306f\u201c\u4f7f\u3046\u3079\u304d\u304b\u898b\u6975\u3081\u308b\u529b\u201d\u304c\u554f\u308f\u308c\u308b<\/h3>\n
      \u5348\u5f8c\u8a66\u9a13\u3067\u306f\u3001\u5fc5\u305a\u3057\u3082\u300c\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3092\u4f7f\u3048\u300d\u3068\u3044\u3046\u610f\u56f3\u3067\u306f\u306a\u304f\u3001\u300c\u6700\u9069\u306a\u624b\u6bb5\u3092\u9078\u3079\u308b\u304b\uff1f\u300d<\/strong>\u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002
      \n\u305d\u306e\u305f\u3081\u3001\u300c\u3059\u3079\u3066\u3092\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3067\u89e3\u6c7a\u3057\u3088\u3046\u300d\u3068\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u300c\u3053\u308c\u306fGROUP BY\u306e\u65b9\u304c\u9069\u5207\u3067\u306f\uff1f\u300d\u3068\u3044\u3046\u8996\u70b9<\/strong>\u3082\u91cd\u8981\u3067\u3059\u3002<\/p>\n
      \u5348\u5f8c\u8a66\u9a13\u3067\u72d9\u308f\u308c\u308bSQL\u30ad\u30fc\u30ef\u30fc\u30c9\u3068\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306e\u9023\u643a\u30d1\u30bf\u30fc\u30f3<\/h2>\n
      IPA\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7cfb\u8a66\u9a13\u3067\u306f\u3001\u300c\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u305d\u306e\u3082\u306e\u300d\u3088\u308a\u3082\u3001\u300c\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\uff0b\u4ed6\u306eSQL\u69cb\u6587\u300d\u306e\u7d44\u307f\u5408\u308f\u305b\u30d1\u30bf\u30fc\u30f3<\/strong>\u3067\u554f\u308f\u308c\u308b\u30b1\u30fc\u30b9\u304c\u591a\u304f\u898b\u3089\u308c\u307e\u3059\u3002
      \n\u3053\u3053\u3067\u306f\u8a66\u9a13\u306b\u983b\u51fa\u3059\u308b\u30ad\u30fc\u30ef\u30fc\u30c9\u3068\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3068\u306e\u201c\u9023\u52d5\u95a2\u4fc2\u201d\u3092\u5177\u4f53\u7684\u306b\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n
      ✅ \u8a66\u9a13\u3067\u3088\u304f\u51fa\u308bSQL\u30ad\u30fc\u30ef\u30fc\u30c9\u3068\u4f7f\u3044\u65b9<\/h3>\n\n\n\n\n\n\n\n\n\n
      \u30ad\u30fc\u30ef\u30fc\u30c9<\/th>\n\u9023\u52d5\u30dd\u30a4\u30f3\u30c8<\/th>\n\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3068\u306e\u95a2\u9023\u4f8b<\/th>\n<\/tr>\n
      OVER<\/code><\/td>\n\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306e\u672c\u4f53\u90e8\u5206<\/td>\nSUM() OVER (...)<\/code> \u306a\u3069<\/td>\n<\/tr>\n
      PARTITION BY<\/code><\/td>\n\u30b0\u30eb\u30fc\u30d7\u5206\u3051<\/td>\n\u30ab\u30c6\u30b4\u30ea\u3084\u90e8\u7f72\u5358\u4f4d\u306e\u8a08\u7b97<\/td>\n<\/tr>\n
      ORDER BY<\/code>\uff08OVER\u53e5\u5185\uff09<\/td>\n\u4e26\u3073\u9806\u6307\u5b9a<\/td>\n\u7d2f\u7a4d\u3001\u30e9\u30f3\u30ad\u30f3\u30b0\u7cfb\u306e\u6b63\u78ba\u306a\u8a08\u7b97\u306b\u5fc5\u8981<\/td>\n<\/tr>\n
      RANK()<\/code> \/ ROW_NUMBER()<\/code><\/td>\n\u9806\u4f4d\u306e\u7b97\u51fa<\/td>\n\u4e26\u3073\u66ff\u3048\u30fb\u91cd\u8907\u306e\u6271\u3044\u306b\u9055\u3044\u3042\u308a<\/td>\n<\/tr>\n
      LAG()<\/code> \/ LEAD()<\/code><\/td>\n\u524d\u5f8c\u306e\u5024\u306e\u53c2\u7167<\/td>\n\u524d\u56de\u3068\u306e\u5dee\u5206\u3001\u9077\u79fb\u691c\u51fa\u306a\u3069<\/td>\n<\/tr>\n
      CASE<\/code><\/td>\n\u6761\u4ef6\u306b\u3088\u308b\u632f\u308a\u5206\u3051<\/td>\n\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306e\u7d50\u679c\u3092\u3082\u3068\u306b\u6761\u4ef6\u5206\u5c90<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      🔍 \u5177\u4f53\u7684\u306a\u9023\u643a\u30d1\u30bf\u30fc\u30f3\u4f8b<\/h3>\n
      \u2460 \u7d2f\u7a4d\u58f2\u4e0a\u3092\u30ab\u30c6\u30b4\u30ea\u5225\u306b\u8a08\u7b97<\/h4>\n
      SELECT \u5546\u54c1\u30ab\u30c6\u30b4\u30ea, \u58f2\u4e0a\u65e5, \u58f2\u4e0a\u91d1\u984d,\n       SUM(\u58f2\u4e0a\u91d1\u984d) OVER (PARTITION BY \u5546\u54c1\u30ab\u30c6\u30b4\u30ea ORDER BY \u58f2\u4e0a\u65e5) AS \u7d2f\u7a4d\u58f2\u4e0a\nFROM \u58f2\u4e0a\u30c7\u30fc\u30bf;<\/code><\/pre>\n
      \u2192 \u30ab\u30c6\u30b4\u30ea\u3054\u3068\u306b\u65e5\u4ed8\u9806\u3067\u58f2\u4e0a\u3092\u7a4d\u307f\u4e0a\u3052\u308b\u51e6\u7406\u3002ORDER BY \u306e\u91cd\u8981\u6027\u304c\u554f\u308f\u308c\u3084\u3059\u3044<\/strong><\/p>\n
      \u2461 \u524d\u56de\u3068\u306e\u5dee\u5206\u3092\u51fa\u3059\uff08LAG\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\uff09<\/h4>\n
      SELECT \u793e\u54e1ID, \u6708, \u52e4\u6020\u6642\u9593,\n       \u52e4\u6020\u6642\u9593 - LAG(\u52e4\u6020\u6642\u9593) OVER (PARTITION BY \u793e\u54e1ID ORDER BY \u6708) AS \u5897\u6e1b\nFROM \u52e4\u6020\u8a18\u9332;<\/code><\/pre>\n
      \u2192 LAG\u95a2\u6570\u3068\u6f14\u7b97\u3092\u7d44\u307f\u5408\u308f\u305b\u308b<\/strong>\u30d1\u30bf\u30fc\u30f3\u306f\u983b\u51fa\u3002NULL\u8003\u616e\u306e\u9078\u629e\u80a2\u3082\u3088\u304f\u51fa\u984c\u3055\u308c\u308b\u3002<\/p>\n
      \u2462 \u30e9\u30f3\u30ad\u30f3\u30b0\u3067\u4e0a\u4f4d3\u4f4d\u307e\u3067\u3092\u62bd\u51fa\uff08RANK + \u30b5\u30d6\u30af\u30a8\u30ea\uff09<\/h4>\n
      SELECT * FROM (\n  SELECT \u793e\u54e1ID, \u90e8\u7f72, \u7d66\u4e0e,\n         RANK() OVER (PARTITION BY \u90e8\u7f72 ORDER BY \u7d66\u4e0e DESC) AS \u9806\u4f4d\n  FROM \u793e\u54e1\n) AS \u30e9\u30f3\u30af\u4ed8\u3051\nWHERE \u9806\u4f4d <= 3;<\/code><\/pre>\n
      \u2192 \u90e8\u7f72\u3054\u3068\u306b\u7d66\u4e0e\u9806\u4f4d\u3092\u4ed8\u3051\u3066\u300c\u4e0a\u4f4d3\u4eba\u306e\u307f\u300d\u3092\u62bd\u51fa\u3002RANK\u95a2\u6570\uff0b\u30b5\u30d6\u30af\u30a8\u30ea<\/strong>\u304c\u3088\u304f\u4f7f\u308f\u308c\u308b\u3002<\/p>\n
      \u2463 \u6700\u65b0\u6708\u306e\u5024\u3068\u904e\u53bb\u6708\u306e\u5dee\u3092\u6bd4\u8f03\uff08LEAD\uff0b\u65e5\u4ed8\u6761\u4ef6\uff09<\/h4>\n
      SELECT \u5546\u54c1ID, \u6708, \u58f2\u4e0a,\n       \u58f2\u4e0a - LEAD(\u58f2\u4e0a) OVER (PARTITION BY \u5546\u54c1ID ORDER BY \u6708 DESC) AS \u524d\u6708\u6bd4\nFROM \u58f2\u4e0a\u30c7\u30fc\u30bf;<\/code><\/pre>\n
      \u2192 LEAD\u95a2\u6570\u3068\u6f14\u7b97\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u30d1\u30bf\u30fc\u30f3<\/strong>\u3002ORDER BY \u306e DESC \u6307\u5b9a\u306b\u6ce8\u610f\u3002<\/p>\n
      \u2464 \u6761\u4ef6\u306b\u5fdc\u3058\u3066\u96c6\u8a08\u5bfe\u8c61\u3092\u5207\u308a\u66ff\u3048\u308b\uff08CASE\uff0b\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\uff09<\/h4>\n
      SELECT \u793e\u54e1ID, \u52e4\u52d9\u533a\u5206, \u52e4\u52d9\u6642\u9593,\n       SUM(CASE WHEN \u52e4\u52d9\u533a\u5206 = '\u901a\u5e38' THEN \u52e4\u52d9\u6642\u9593 ELSE 0 END)\n       OVER (PARTITION BY \u793e\u54e1ID ORDER BY \u65e5\u4ed8) AS \u901a\u5e38\u52e4\u52d9\u7d2f\u7a4d\nFROM \u52e4\u6020\u8a18\u9332;<\/code><\/pre>\n
      \u2192 CASE\u3067\u6761\u4ef6\u5206\u5c90\u3057\u305f\u7d2f\u7a4d\u96c6\u8a08<\/strong>\u3002\u8a66\u9a13\u3067\u306f\u300c\u6761\u4ef6\u306b\u5fdc\u3058\u305f\u96c6\u8a08\u300d\u304c\u983b\u51fa\u3067\u3059\u3002<\/p>\n
      💡 \u8a66\u9a13\u5bfe\u7b56\u306e\u30b3\u30c4<\/h3>\n
        \n
      • OVER\u53e5\u306e\u4e2d\u8eab\u3092\u8aad\u3081\u3070\u3001\u4f55\u304c\u8d77\u304d\u3066\u3044\u308b\u304b\u5206\u304b\u308b\u3088\u3046\u306b\u306a\u308b<\/strong><\/li>\n
      • ORDER BY\u304c\u306a\u3044\u3068\u3001\u671f\u5f85\u901a\u308a\u306b\u4e26\u3070\u306a\u3044\uff1d\u6e1b\u70b9\u3055\u308c\u3084\u3059\u3044<\/strong><\/li>\n
      • RANK\u7cfb\u3068ROW_NUMBER\u306e\u9055\u3044\u306b\u7740\u76ee\u305b\u3088<\/strong><\/li>\n<\/ul>\n
        \u8a66\u9a13\u3067\u306e\u3072\u3063\u304b\u3051\u30dd\u30a4\u30f3\u30c8\u3068\u9593\u9055\u3048\u3084\u3059\u3044\u843d\u3068\u3057\u7a74\u2502\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306e\u8aa4\u7528\u306b\u6ce8\u610f<\/h2>\n
        \u5348\u5f8c\u8a66\u9a13\u3067\u306f\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306e\u300c\u57fa\u672c\u7684\u306a\u66f8\u304d\u65b9\u300d\u3088\u308a\u3082\u3001\u201c\u5fae\u5999\u306a\u9055\u3044\u306b\u3088\u308b\u8aa4\u7b54\u201d\u3092\u8a98\u3046\u9078\u629e\u80a2<\/strong>\u304c\u591a\u304f\u51fa\u984c\u3055\u308c\u307e\u3059\u3002
        \n\u3053\u3053\u3067\u306f\u3001\u53d7\u9a13\u751f\u304c\u3064\u307e\u305a\u304d\u3084\u3059\u3044\u30dd\u30a4\u30f3\u30c8\u3084\u3001\u3088\u304f\u3042\u308b\u30df\u30b9\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n
        ❗ \u3088\u304f\u3042\u308b\u9593\u9055\u3044\u3068\u305d\u306e\u539f\u56e0<\/h3>\n\n\n\n\n\n\n\n
        \u30df\u30b9\u4f8b<\/th>\n\u539f\u56e0<\/th>\n\u6b63\u3057\u3044\u7406\u89e3<\/th>\n<\/tr>\n
        OVER<\/code> \u306b ORDER BY<\/code> \u3092\u66f8\u304d\u5fd8\u308c\u308b<\/td>\n\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u4e26\u3073\u3067\u96c6\u8a08\u3055\u308c\u3001\u9806\u4f4d\u3084\u7d2f\u7a4d\u7d50\u679c\u304c\u60f3\u5b9a\u5916\u306b\u306a\u308b<\/td>\n\u4e26\u3073\u9806\u306f\u5e38\u306b\u610f\u8b58\u3057\u3066\u6307\u5b9a\u3059\u308b<\/td>\n<\/tr>\n
        PARTITION BY<\/code> \u3092\u4f7f\u3044\u5fd8\u308c\u308b<\/td>\n\u5168\u4f53\u3067\u96c6\u8a08\u3055\u308c\u3066\u3057\u307e\u3044\u3001\u300c\u90e8\u7f72\u3054\u3068\u306e\u5e73\u5747\u300d\u306a\u3069\u304c\u7834\u7dbb<\/td>\n\u5fc5\u8981\u306a\u5358\u4f4d\u3054\u3068\u306b\u533a\u5207\u308b<\/td>\n<\/tr>\n
        RANK()<\/code> \u3068 ROW_NUMBER()<\/code> \u306e\u4f7f\u3044\u5206\u3051\u30df\u30b9<\/td>\n\u540c\u9806\u4f4d\u3042\u308a\uff0f\u306a\u3057\u3067\u7d50\u679c\u304c\u5927\u304d\u304f\u5909\u308f\u308b<\/td>\n\u554f\u984c\u306e\u610f\u56f3\u3092\u78ba\u8a8d\u3057\u3066\u9078\u629e\u3059\u308b<\/td>\n<\/tr>\n
        LAG()<\/code> \u306e NULL \u3092\u8003\u616e\u3057\u306a\u3044<\/td>\n\u521d\u56de\u306e\u884c\u3067\u5dee\u5206\u8a08\u7b97\u304c\u5d29\u308c\u308b<\/td>\nCOALESCE()<\/code> \u306a\u3069\u3067\u88dc\u3046\u51e6\u7406\u304c\u5fc5\u8981\u306a\u5834\u5408\u3042\u308a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        📌 \u8a66\u9a13\u3067\u3088\u304f\u51fa\u308b\u201c\u3072\u3063\u304b\u3051\u30dd\u30a4\u30f3\u30c8\u201d<\/h3>\n
          \n
        • PARTITION BY \u306e\u6307\u5b9a\u304c\u3042\u308b\u304b\u30fb\u306a\u3044\u304b\u306e\u9055\u3044\u3092\u8aad\u307f\u843d\u3068\u3055\u305b\u308b<\/strong><\/li>\n
        • ORDER BY \u306e\u9806\u5e8f\uff08ASC \/ DESC\uff09\u3067\u610f\u5473\u304c\u9006\u8ee2\u3059\u308b\u9078\u629e\u80a2<\/strong><\/li>\n
        • RANK\u7cfb\u306e\u6570\u5024\u306e\u30ba\u30ec\u306b\u7740\u76ee\u3067\u304d\u308b\u304b<\/strong><\/li>\n
        • NULL\u306b\u5bfe\u3059\u308b\u7406\u89e3\uff08\u521d\u884c\u306eLAG\/LEAD\u306e\u6271\u3044\uff09\u3092\u554f\u3046\u8a2d\u554f<\/strong><\/li>\n<\/ul>\n
          ✅ \u56de\u907f\u306e\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h3>\n
            \n
          • OVER\u53e5\u306e\u4e2d\u306b PARTITION BY<\/code> \u3068 ORDER BY<\/code> \u304c\u9069\u5207\u306b\u3042\u308b\u304b\uff1f<\/li>\n
          • \u96c6\u8a08\u5bfe\u8c61\u306e\u7c92\u5ea6\u306f\u6b63\u3057\u3044\u304b\uff08\u90e8\u7f72\u5358\u4f4d\u3001\u65e5\u4ed8\u5358\u4f4d\u306a\u3069\uff09\uff1f<\/li>\n
          • \u9806\u4f4d\u306e\u6271\u3044\uff08\u540c\u9806\u4f4d\u3042\u308a\uff0f\u306a\u3057\uff09\u306f\u8a2d\u554f\u306b\u5408\u3063\u3066\u3044\u308b\u304b\uff1f<\/li>\n
          • NULL\u304c\u8fd4\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u95a2\u6570\u306b\u5bfe\u3057\u3066\u88dc\u6b63\u304c\u5fc5\u8981\u304b\uff1f<\/li>\n<\/ul>\n
            \u30b3\u30e9\u30e0\uff1a\u96c6\u8a08\u95a2\u6570\u3068GROUP BY\u3001\u305d\u3057\u3066\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306e\u771f\u4fa1<\/h2>\n
            SQL\u3092\u5b66\u3093\u3067\u3044\u3066\u6df7\u4e71\u3057\u3084\u3059\u3044\u306e\u304c\u300c\u96c6\u8a08\u95a2\u6570\u3068GROUP BY\u306e\u95a2\u4fc2\u300d\u3068\u300c\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306b\u304a\u3051\u308bPARTITION BY\u30fbORDER BY\u306e\u5f79\u5272\u300d\u3067\u3059\u3002\u6700\u5f8c\u306b\u6574\u7406\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
            \u524d\u63d0\uff1a\u5143\u30c7\u30fc\u30bf<\/strong><\/p>\n
            \u4ee5\u4e0b\u306e\u58f2\u4e0a\u30c6\u30fc\u30d6\u30eb\u3092\u4f8b\u306b\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n\n\n\n\n
            \u65e5\u4ed8<\/th>\n\u90e8\u7f72<\/th>\n\u540d\u524d<\/th>\n\u58f2\u4e0a<\/th>\n<\/tr>\n
            2025-09-01<\/td>\n\u55b6\u696d<\/td>\n\u7530\u4e2d<\/td>\n100<\/td>\n<\/tr>\n
            2025-09-02<\/td>\n\u55b6\u696d<\/td>\n\u9234\u6728<\/td>\n150<\/td>\n<\/tr>\n
            2025-09-03<\/td>\n\u958b\u767a<\/td>\n\u4f50\u85e4<\/td>\n200<\/td>\n<\/tr>\n
            2025-09-04<\/td>\n\u958b\u767a<\/td>\n\u5c71\u7530<\/td>\n50<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            \u96c6\u8a08\u95a2\u6570\u3068GROUP BY\u306e\u95a2\u4fc2<\/h3>\n
            SELECT \u90e8\u7f72, SUM(\u58f2\u4e0a)\nFROM \u58f2\u4e0a\u30c6\u30fc\u30d6\u30eb\nGROUP BY \u90e8\u7f72;\n<\/code><\/pre>\n
            \u7d50\u679c<\/strong><\/p>\n\n\n\n\n\n
            \u90e8\u7f72<\/th>\nSUM(\u58f2\u4e0a)<\/th>\n<\/tr>\n
            \u55b6\u696d<\/td>\n250<\/td>\n<\/tr>\n
            \u958b\u767a<\/td>\n250<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3068 PARTITION BY<\/code> \/ ORDER BY<\/code><\/h3>\n
            SELECT\n  \u90e8\u7f72,\n  \u540d\u524d,\n  \u58f2\u4e0a,\n  SUM(\u58f2\u4e0a) OVER (PARTITION BY \u90e8\u7f72) AS \u90e8\u7f72\u5408\u8a08,\n  SUM(\u58f2\u4e0a) OVER (PARTITION BY \u90e8\u7f72 ORDER BY \u65e5\u4ed8) AS \u90e8\u7f72\u7d2f\u8a08\nFROM \u58f2\u4e0a\u30c6\u30fc\u30d6\u30eb;\n<\/code><\/pre>\n
            \u7d50\u679c<\/strong><\/p>\n\n\n\n\n\n\n\n
            \u90e8\u7f72<\/th>\n\u540d\u524d<\/th>\n\u58f2\u4e0a<\/th>\n\u90e8\u7f72\u5408\u8a08<\/th>\n\u90e8\u7f72\u7d2f\u8a08<\/th>\n<\/tr>\n
            \u55b6\u696d<\/td>\n\u7530\u4e2d<\/td>\n100<\/td>\n250<\/td>\n100<\/td>\n<\/tr>\n
            \u55b6\u696d<\/td>\n\u9234\u6728<\/td>\n150<\/td>\n250<\/td>\n250<\/td>\n<\/tr>\n
            \u958b\u767a<\/td>\n\u4f50\u85e4<\/td>\n200<\/td>\n250<\/td>\n200<\/td>\n<\/tr>\n
            \u958b\u767a<\/td>\n\u5c71\u7530<\/td>\n50<\/td>\n250<\/td>\n250<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            OVER()<\/code> \u306e\u304b\u3063\u3053\u5185\u304c\u7a7a\u306e\u3068\u304d<\/h3>\n
            SELECT\n  \u65e5\u4ed8,\n  \u540d\u524d,\n  \u58f2\u4e0a,\n  SUM(\u58f2\u4e0a) OVER () AS \u7dcf\u58f2\u4e0a\nFROM \u58f2\u4e0a\u30c6\u30fc\u30d6\u30eb;\n<\/code><\/pre>\n
            \u7d50\u679c<\/strong><\/p>\n\n\n\n\n\n\n\n
            \u65e5\u4ed8<\/th>\n\u540d\u524d<\/th>\n\u58f2\u4e0a<\/th>\n\u7dcf\u58f2\u4e0a<\/th>\n<\/tr>\n
            2025-09-01<\/td>\n\u7530\u4e2d<\/td>\n100<\/td>\n500<\/td>\n<\/tr>\n
            2025-09-02<\/td>\n\u9234\u6728<\/td>\n150<\/td>\n500<\/td>\n<\/tr>\n
            2025-09-03<\/td>\n\u4f50\u85e4<\/td>\n200<\/td>\n500<\/td>\n<\/tr>\n
            2025-09-04<\/td>\n\u5c71\u7530<\/td>\n50<\/td>\n500<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            LAG \/ LEAD \u3067\u306e\u524d\u5f8c\u6bd4\u8f03<\/h3>\n
            SELECT\n  \u65e5\u4ed8,\n  \u540d\u524d,\n  \u58f2\u4e0a,\n  LAG(\u58f2\u4e0a, 1)  OVER (ORDER BY \u65e5\u4ed8) AS \u524d\u65e5\u58f2\u4e0a,\n  LEAD(\u58f2\u4e0a, 1) OVER (ORDER BY \u65e5\u4ed8) AS \u7fcc\u65e5\u58f2\u4e0a\nFROM \u58f2\u4e0a\u30c6\u30fc\u30d6\u30eb;\n<\/code><\/pre>\n
            \u7d50\u679c<\/strong><\/p>\n\n\n\n\n\n\n\n
            \u65e5\u4ed8<\/th>\n\u540d\u524d<\/th>\n\u58f2\u4e0a<\/th>\n\u524d\u65e5\u58f2\u4e0a<\/th>\n\u7fcc\u65e5\u58f2\u4e0a<\/th>\n<\/tr>\n
            2025-09-01<\/td>\n\u7530\u4e2d<\/td>\n100<\/td>\nNULL<\/td>\n150<\/td>\n<\/tr>\n
            2025-09-02<\/td>\n\u9234\u6728<\/td>\n150<\/td>\n100<\/td>\n200<\/td>\n<\/tr>\n
            2025-09-03<\/td>\n\u4f50\u85e4<\/td>\n200<\/td>\n150<\/td>\n50<\/td>\n<\/tr>\n
            2025-09-04<\/td>\n\u5c71\u7530<\/td>\n50<\/td>\n200<\/td>\nNULL<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            RANK \u306b\u3088\u308b\u9806\u4f4d\u4ed8\u3051<\/h3>\n
            SELECT\n  \u540d\u524d,\n  \u58f2\u4e0a,\n  RANK() OVER (ORDER BY \u58f2\u4e0a DESC) AS \u58f2\u4e0a\u9806\u4f4d\nFROM \u58f2\u4e0a\u30c6\u30fc\u30d6\u30eb;\n<\/code><\/pre>\n
            \u7d50\u679c<\/strong><\/p>\n\n\n\n\n\n\n\n
            \u540d\u524d<\/th>\n\u58f2\u4e0a<\/th>\n\u58f2\u4e0a\u9806\u4f4d<\/th>\n<\/tr>\n
            \u4f50\u85e4<\/td>\n200<\/td>\n1<\/td>\n<\/tr>\n
            \u9234\u6728<\/td>\n150<\/td>\n2<\/td>\n<\/tr>\n
            \u7530\u4e2d<\/td>\n100<\/td>\n3<\/td>\n<\/tr>\n
            \u5c71\u7530<\/td>\n50<\/td>\n4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            \u3010\u91cd\u8981\u3011RANK \u306e ORDER BY \u306f OVER() \u306e\u5185\u5074\u306b\u5fc5\u8981<\/h4>\n
            \u5916\u5074\uff08SELECT \u306e\u6700\u5f8c\uff09\u306e ORDER BY<\/code> \u306f\u3042\u304f\u307e\u3067\u300c\u8868\u793a\u9806\u300d\u3092\u6c7a\u3081\u308b\u3060\u3051\u3067\u3001\u9806\u4f4d\u306e\u8a08\u7b97\u306b\u306f\u5f71\u97ff\u3057\u307e\u305b\u3093\u3002
            \n\u9806\u4f4d\u306e\u57fa\u6e96\u306f\u5fc5\u305a OVER(ORDER BY ...)<\/code> \u306e\u5185\u5074<\/strong>\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
            ROW_NUMBER \u306b\u3088\u308b\u9023\u756a\u4ed8\u4e0e<\/h3>\n
            SELECT\n  \u540d\u524d,\n  \u58f2\u4e0a,\n  ROW_NUMBER() OVER (ORDER BY \u58f2\u4e0a DESC) AS \u884c\u756a\u53f7\nFROM \u58f2\u4e0a\u30c6\u30fc\u30d6\u30eb;\n<\/code><\/pre>\n
            \u7d50\u679c<\/strong><\/p>\n\n\n\n\n\n\n\n
            \u540d\u524d<\/th>\n\u58f2\u4e0a<\/th>\n\u884c\u756a\u53f7<\/th>\n<\/tr>\n
            \u4f50\u85e4<\/td>\n200<\/td>\n1<\/td>\n<\/tr>\n
            \u9234\u6728<\/td>\n150<\/td>\n2<\/td>\n<\/tr>\n
            \u7530\u4e2d<\/td>\n100<\/td>\n3<\/td>\n<\/tr>\n
            \u5c71\u7530<\/td>\n50<\/td>\n4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            \u3010\u6ce8\u610f\u3011ROW_NUMBER \u306e\u9806\u5e8f\u4fdd\u8a3c<\/h4>\n
            ROW_NUMBER()<\/code> \u306f\u30e6\u30cb\u30fc\u30af\u306a\u9023\u756a\u3092\u632f\u308a\u307e\u3059\u304c\u3001\u3069\u306e\u9806\u756a\u3067\u756a\u53f7\u304c\u4ed8\u304f\u304b<\/strong>\u306f OVER(ORDER BY ...)<\/code> \u306e\u5185\u5074\u306b\u66f8\u304b\u306a\u3044\u3068\u4fdd\u8a3c\u3055\u308c\u307e\u305b\u3093\u3002
            \n\u3082\u3057 OVER()<\/code> \u3092\u7a7a\u306b\u3057\u3066\u5916\u5074\u306b\u3060\u3051 ORDER BY<\/code> \u3092\u66f8\u3044\u305f\u5834\u5408\u3001\u8868\u793a\u9806\u306f\u4e26\u3073\u66ff\u3048\u3089\u308c\u3066\u3082\u3001\u756a\u53f7\u306e\u4ed8\u4e0e\u9806\u5e8f\u306f\u5185\u90e8\u51e6\u7406\u4f9d\u5b58\u3068\u306a\u308a\u3001\u74b0\u5883\u3084\u5b9f\u884c\u8a08\u753b\u306b\u3088\u3063\u3066\u5909\u308f\u308b\u5371\u967a\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
            👉 \u3057\u305f\u304c\u3063\u3066\u3001\u5fc5\u305a OVER \u5185\u306e ORDER BY \u3067\u9806\u5e8f\u3092\u6307\u5b9a\u3059\u308b<\/strong>\u306e\u304c\u6b63\u3057\u3044\u66f8\u304d\u65b9\u3067\u3059\u3002<\/p>\n
            \u30b3\u30e9\u30e0\u307e\u3068\u3081<\/h3>\n
              \n
            • \u96c6\u8a08\u95a2\u6570\uff0bGROUP BY<\/strong>\uff1a\u884c\u3092\u307e\u3068\u3081\u3066\u77ed\u304f\u3059\u308b\uff08\u30b0\u30eb\u30fc\u30d7\u306e\u6570\u3060\u3051\u51fa\u529b\uff09<\/li>\n
            • \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\uff0bOVER()<\/strong>\uff1a\u884c\u3092\u6b8b\u3057\u305f\u307e\u307e\u300c\u5168\u4f53\u306e\u96c6\u8a08\u7d50\u679c\u300d\u3092\u5217\u3068\u3057\u3066\u8ffd\u52a0<\/li>\n
            • \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\uff0bPARTITION BY<\/strong>\uff1a\u884c\u3092\u6b8b\u3057\u305f\u307e\u307e\u300c\u30b0\u30eb\u30fc\u30d7\u5358\u4f4d\u306e\u60c5\u5831\u300d\u3092\u5217\u3068\u3057\u3066\u8ffd\u52a0<\/li>\n
            • \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\uff0bORDER BY<\/strong>\uff1a\u9806\u5e8f\u4f9d\u5b58\u306e\u8a08\u7b97\uff08\u7d2f\u8a08\u3001LAG\/LEAD\u3001\u9806\u4f4d\u4ed8\u3051\u3001\u9023\u756a\u4ed8\u3051\uff09\u3092\u53ef\u80fd\u306b\u3059\u308b<\/li>\n
            • RANK \/ ROW_NUMBER \u306e ORDER BY \u306f OVER \u5185\u306b\u5fc5\u9808<\/strong>\uff08\u5916\u5074\u306e ORDER BY \u306f\u8868\u793a\u9806\u3060\u3051\u3092\u5236\u5fa1\uff09<\/li>\n<\/ul>\n
              \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3092\u4f7f\u3048\u3070\u3001\u300c\u96c6\u8a08\u300d\u300c\u6bd4\u8f03\u300d\u300c\u9806\u4f4d\u4ed8\u3051\u300d\u300c\u9023\u756a\u4ed8\u3051\u300d\u3092\u3001\u5143\u306e\u884c\u3092\u4fdd\u6301\u3057\u305f\u307e\u307e\u81ea\u5728\u306b\u7d44\u307f\u5408\u308f\u305b\u3089\u308c\u307e\u3059\u3002<\/p>\n
              \u307e\u3068\u3081\u2502\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u3092\u201c\u7406\u89e3\u3057\u3066\u4f7f\u3048\u308b\u201d\u6280\u8853\u306b\u3059\u308b\u305f\u3081\u306b<\/h2>\n
              \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306f\u300c\u305f\u3060\u306eSQL\u95a2\u6570\u306e\u4e00\u7a2e\u300d\u3068\u6349\u3048\u308b\u3068\u96e3\u89e3\u3067\u3059\u304c\u3001\u300c\u90e8\u5206\u96c6\u8a08\u306e\u305f\u3081\u306e\u201c\u7a93\u201d\u3092\u958b\u304f\u9053\u5177<\/strong>\u300d\u3068\u8003\u3048\u308b\u3053\u3068\u3067\u3001\u5b9f\u52d9\u3067\u3082\u8a66\u9a13\u3067\u3082\u5f37\u529b\u306a\u6b66\u5668\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
              \u3053\u306e\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u305f\u3088\u3046\u306b\u3001GROUP BY \u3068\u306e\u9055\u3044\u3084 PARTITION BY\u30fbORDER BY \u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9\u3001LAG\/LEAD \u306a\u3069\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u30d1\u30bf\u30fc\u30f3\u3092\u62bc\u3055\u3048\u308b\u3053\u3068\u304c\u3001\u5348\u5f8c\u8a66\u9a13\u5bfe\u7b56\u306e\u8981<\/strong>\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
                \n
              • \u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u306f\u300c\u96c6\u8a08\uff0b\u8a73\u7d30\u306e\u540c\u6642\u8868\u793a\u300d\u304c\u5f97\u610f<\/li>\n
              • GROUP BY \u3067\u306f\u5b9f\u73fe\u3067\u304d\u306a\u3044\u201c\u884c\u3054\u3068\u306e\u76f8\u5bfe\u51e6\u7406\u201d\u3092\u88dc\u3048\u308b<\/li>\n
              • \u8a66\u9a13\u3067\u306f\u300c\u5fae\u5999\u306a\u6307\u5b9a\u6f0f\u308c\u300d\u306b\u3088\u308b\u8aa4\u7b54\u3092\u8a98\u3046\u554f\u984c\u306b\u6ce8\u610f<\/li>\n<\/ul>\n
                \u5358\u306a\u308b\u4e38\u6697\u8a18\u3067\u306f\u306a\u304f\u3001\u6982\u5ff5\u3092\u76f4\u611f\u7684\u306b\u7406\u89e3\u3057\u3001\u9069\u5207\u306a\u5834\u9762\u3067\u4f7f\u3044\u3053\u306a\u3059\u529b<\/strong>\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u304c\u3001\u30b9\u30b3\u30a2\u30a2\u30c3\u30d7\u3078\u306e\u8fd1\u9053\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u3084\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u306e\u5348\u5f8c\u554f\u984c\u3067\u983b\u51fa\u306e\u300c\u30a6\u30a3\u30f3\u30c9\u30a6\u95a2\u6570\u300d\u3002SQL\u306e\u4e0a\u7d1a\u8005\u5411\u3051\u6a5f\u80fd\u3067\u3042\u308a\u306a\u304c\u3089\u3001\u300c\u305d\u3082\u305d\u3082\u4f55\u304c\u201c\u30a6\u30a3\u30f3\u30c9\u30a6\u201d\u306a\u306e\uff1f\u300d\u300cGROUP BY\u3068\u306e\u9055\u3044\u304c\u3044\u307e\u3044\u3061\u5206\u304b … <\/p>\n","protected":false},"author":2,"featured_media":5473,"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-5447","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\/5447","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=5447"}],"version-history":[{"count":0,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/posts\/5447\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/media\/5473"}],"wp:attachment":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/media?parent=5447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/categories?post=5447"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/tags?post=5447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}