{"id":5910,"date":"2025-09-23T15:56:21","date_gmt":"2025-09-23T06:56:21","guid":{"rendered":"https:\/\/sky-peace.net\/?p=5910"},"modified":"2025-09-23T15:56:21","modified_gmt":"2025-09-23T06:56:21","slug":"db-sp-1","status":"publish","type":"post","link":"https:\/\/sky-peace.net\/certified\/db-sp-1\/","title":{"rendered":"SQL\u306e\u5206\u6790\u529b\u304c\u98db\u8e8d\u3059\u308b\uff01DB\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u3067\u554f\u308f\u308c\u308bWindow\u95a2\u6570\u306e\u4ed5\u7d44\u307f\u3068\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af"},"content":{"rendered":"

\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u306e\u5348\u5f8c\u554f\u984c\u3001\u7279\u306bSQL\u306e\u8a18\u8ff0\u3067\u300c\u3069\u3046\u66f8\u3051\u3070\u3044\u3044\u3093\u3060\u2026\u300d\u3068\u624b\u304c\u6b62\u307e\u3063\u3066\u3057\u307e\u3063\u305f\u7d4c\u9a13\u306f\u3042\u308a\u307e\u305b\u3093\u304b\uff1f\u8fd1\u5e74\u306e\u8a66\u9a13\u3067\u306f\u3001\u5358\u306a\u308b\u30c7\u30fc\u30bf\u62bd\u51fa\u3060\u3051\u3067\u306a\u304f\u3001\u3088\u308a\u9ad8\u5ea6\u3067\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u5206\u6790\u529b\u304c\u554f\u308f\u308c\u308b\u50be\u5411\u304c\u5f37\u307e\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u5408\u683c\u306e\u9375\u3092\u63e1\u308b\u306e\u304c\u3001\u6700\u983b\u51fa\u30c6\u30fc\u30de\u3067\u3042\u308b\u300cWindow\u95a2\u6570\u300d<\/strong>\u3067\u3059\u3002<\/p>\n

Window\u95a2\u6570\u306f\u3001\u4e00\u8a00\u3067\u3044\u3048\u3070\u300c\u96c6\u8a08\u3057\u3064\u3064\u3082\u3001\u5143\u306e\u884c\u3092\u5931\u308f\u305a\u306b\u7d50\u679c\u3092\u5404\u884c\u3078\u8fd4\u305b\u308b\u4fbf\u5229\u306a\u6a5f\u80fd\u300d<\/strong>\u3067\u3059\u3002\u5f93\u6765\u306eGROUP BY<\/code>\u53e5\u3067\u306f\u96e3\u3057\u304b\u3063\u305f\u300c\u90e8\u9580\u3054\u3068\u306e\u58f2\u4e0a\u30e9\u30f3\u30ad\u30f3\u30b0\u306e\u7b97\u51fa\u300d\u3084\u300c\u524d\u6708\u306e\u58f2\u4e0a\u3068\u306e\u6bd4\u8f03\u300d\u3068\u3044\u3063\u305f\u51e6\u7406\u3092\u3001\u9a5a\u304f\u307b\u3069\u30b7\u30f3\u30d7\u30eb\u306b\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u3057\u304b\u3057\u3001\u305d\u306e\u5f37\u529b\u3055\u3086\u3048\u306b OVER()<\/code> \u3084 PARTITION BY<\/code> \u3068\u3044\u3063\u305f\u72ec\u7279\u306e\u69cb\u6587\u306b\u6238\u60d1\u3044\u3001\u82e6\u624b\u610f\u8b58\u3092\u6301\u3064\u53d7\u9a13\u8005\u3082\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u305d\u3093\u306aWindow\u95a2\u6570\u3092\u30bc\u30ed\u304b\u3089\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u3001RANK<\/code>\u306b\u3088\u308b\u9806\u4f4d\u4ed8\u3051\u304b\u3089LAG<\/code>\u3092\u4f7f\u3063\u305f\u884c\u9593\u6bd4\u8f03\u3001\u305d\u3057\u3066\u6700\u5927\u306e\u96e3\u95a2\u3067\u3042\u308b\u30d5\u30ec\u30fc\u30e0\u53e5\uff08ROWS BETWEEN<\/code>\uff09\u307e\u3067\u3001\u8c4a\u5bcc\u306a\u56f3\u89e3\u3068\u5b9f\u8df5\u7684\u306aSQL\u306e\u5177\u4f53\u4f8b\u3092\u4ea4\u3048\u3066\u5fb9\u5e95\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n

\u672c\u8a18\u4e8b\u3092\u8aad\u307f\u7d42\u3048\u308b\u9803\u306b\u306f\u3001Window\u95a2\u6570\u306f\u3042\u306a\u305f\u306e\u5f37\u529b\u306a\u6b66\u5668\u3068\u306a\u308a\u3001\u5348\u5f8c\u8a66\u9a13\u306eSQL\u554f\u984c\u306b\u5bfe\u3059\u308b\u8996\u754c\u304c\u5927\u304d\u304f\u958b\u3051\u3066\u3044\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n

Window\u95a2\u6570\u306e\u57fa\u672c\u69cb\u6587\u2502GROUP BY\u3068\u306e\u6c7a\u5b9a\u7684\u306a\u9055\u3044\u3068\u306f\uff1f<\/h2>\n

Window\u95a2\u6570\u3092\u7406\u89e3\u3059\u308b\u6700\u521d\u306e\u30b9\u30c6\u30c3\u30d7\u306f\u3001\u305d\u306e\u72ec\u7279\u306a\u69cb\u6587 OVER()<\/code> \u53e5\u3068\u3001\u9577\u5e74\u306e\u76f8\u68d2\u3067\u3042\u308b GROUP BY<\/code> \u53e5\u3068\u306e\u6c7a\u5b9a\u7684\u306a\u9055\u3044\u3092\u63b4\u3080\u3053\u3068\u3067\u3059\u3002<\/p>\n

\u3010\u601d\u8003\u30d7\u30ed\u30bb\u30b9\u3011\u306a\u305c GROUP BY \u3067\u306f\u30c0\u30e1\u306a\u306e\u304b\uff1f<\/h3>\n

\u4f8b\u3048\u3070\u3001\u3053\u3053\u306b\u6b21\u306e\u3088\u3046\u306a\u793e\u54e1\u306e\u7d66\u4e0e\u30c7\u30fc\u30bf\u304c\u3042\u3063\u305f\u3068\u3057\u307e\u3059\u3002<\/p>\n

\u30c6\u30fc\u30d6\u30eb\uff1aemployees<\/code><\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
id<\/th>\nname<\/th>\ndepartment<\/th>\nsalary<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\n\u4f50\u85e4<\/td>\n\u55b6\u696d\u90e8<\/td>\n500<\/td>\n<\/tr>\n
2<\/td>\n\u9234\u6728<\/td>\n\u55b6\u696d\u90e8<\/td>\n600<\/td>\n<\/tr>\n
3<\/td>\n\u9ad8\u6a4b<\/td>\n\u958b\u767a\u90e8<\/td>\n650<\/td>\n<\/tr>\n
4<\/td>\n\u7530\u4e2d<\/td>\n\u958b\u767a\u90e8<\/td>\n700<\/td>\n<\/tr>\n
5<\/td>\n\u6e21\u8fba<\/td>\n\u958b\u767a\u90e8<\/td>\n750<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u300c\u5404\u793e\u54e1\u306e\u7d66\u4e0e\u3068\u3001\u305d\u306e\u793e\u54e1\u304c\u6240\u5c5e\u3059\u308b\u90e8\u7f72\u306e\u5e73\u5747\u7d66\u4e0e\u3092\u4e26\u3079\u3066\u8868\u793a\u3057\u305f\u3044\u300d<\/strong>\u3068\u8003\u3048\u305f\u3068\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

GROUP BY<\/code> \u3092\u4f7f\u3063\u3066\u90e8\u7f72\u3054\u3068\u306e\u5e73\u5747\u7d66\u4e0e\u3092\u8a08\u7b97\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n

SELECT\n  department,\n  AVG(salary) AS avg_salary\nFROM\n  employees\nGROUP BY\n  department;\n<\/code><\/pre>\n
\u7d50\u679c<\/strong><\/p>\n\n\n\n\n\n\n
department<\/th>\navg_salary<\/th>\n<\/tr>\n<\/thead>\n
\u55b6\u696d\u90e8<\/td>\n550<\/td>\n<\/tr>\n
\u958b\u767a\u90e8<\/td>\n700<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u3053\u308c\u3067\u306f\u90e8\u7f72\u3054\u3068\u306e\u5e73\u5747\u7d66\u306f\u5206\u304b\u308a\u307e\u3059\u304c\u3001\u300c\u4f50\u85e4\u3055\u3093\u300d\u3084\u300c\u9ad8\u6a4b\u3055\u3093\u300d\u3068\u3044\u3063\u305f\u500b\u3005\u306e\u793e\u54e1\u306e\u60c5\u5831\u304c\u6d88\u3048\u3066\u3057\u307e\u3044\u307e\u3059\u3002GROUP BY<\/code> \u306f\u884c\u3092\u96c6\u7d04<\/strong>\u3057\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u5143\u306e\u884c\u3068\u96c6\u8a08\u7d50\u679c\u3092\u5171\u5b58\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u306e\u3067\u3059\u3002<\/p>\n
Window\u95a2\u6570\u306a\u3089\u300c\u5143\u306e\u884c\u3092\u4fdd\u3063\u305f\u307e\u307e\u300d\u96c6\u8a08\u3067\u304d\u308b<\/h3>\n
\u3053\u306e\u8ab2\u984c\u3092\u89e3\u6c7a\u3059\u308b\u306e\u304cWindow\u95a2\u6570\u3067\u3059\u3002Window\u95a2\u6570\u306f\u3001GROUP BY<\/code> \u306e\u3088\u3046\u306b\u5143\u306e\u884c\u3092\u6f70\u3059\u3053\u3068\u306a\u304f\u3001\u96c6\u8a08\u7d50\u679c\u3092\u5404\u884c\u306b\u8ffd\u52a0<\/strong>\u3059\u308b\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/p>\n
\u3010\u56f3\u89e3\uff1aGROUP BY<\/code> \u3068 Window\u95a2\u6570\u306e\u30a4\u30e1\u30fc\u30b8\u9055\u3044\u3011
\uff08\u203b\u3053\u3053\u306fMermaid.js\u306a\u3069\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u63cf\u753b\u3055\u308c\u308b\u60f3\u5b9a\u3067\u3059\uff09<\/p>\n
\ngraph TD\n    subgraph \u5143\u30c7\u30fc\u30bf\n        A[\u793e\u54e1A
\u55b6\u696d\u90e8
500]\n        B[\u793e\u54e1B
\u55b6\u696d\u90e8
600]\n        C[\u793e\u54e1C
\u958b\u767a\u90e8
650]\n    end\n\n    subgraph GROUP BY \u306e\u5834\u5408\n        D{GROUP BY
department} --> E[\u55b6\u696d\u90e8: 550
\u958b\u767a\u90e8: 650]\n        subgraph Note\n            F[\u5143\u306e\u884c\u306f\u6d88\u3048\u308b]\n        end\n    end\n    \n    subgraph Window\u95a2\u6570\u306e\u5834\u5408\n        G{Window\u95a2\u6570
AVG(...) OVER (...)} --> H[\u793e\u54e1A, \u55b6\u696d\u90e8, 500, 550<\/b>]\n        G --> I[\u793e\u54e1B, \u55b6\u696d\u90e8, 600, 550<\/b>]\n        G --> J[\u793e\u54e1C, \u958b\u767a\u90e8, 650, 650<\/b>]\n        subgraph Note\n            K[\u5143\u306e\u884c\u306b\u96c6\u8a08\u5024\u304c\u4ed8\u4e0e\u3055\u308c\u308b]\n        end\n    end\n\n    A & B & C --> D\n    A & B & C --> G\n<\/code><\/pre>\n
\u57fa\u672c\u69cb\u6587\u3068 PARTITION BY<\/h3>\n
Window\u95a2\u6570\u306f OVER()<\/code> \u53e5\u3068\u30bb\u30c3\u30c8\u3067\u4f7f\u3044\u307e\u3059\u3002OVER()<\/code> \u306e\u4e2d\u3067\u96c6\u8a08\u7bc4\u56f2\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\u95a2\u6570\u540d() OVER (PARTITION BY \u96c6\u8a08\u306e\u533a\u5207\u308a\u3068\u306a\u308b\u5217\u540d)<\/code><\/p>\n
\u3053\u306e PARTITION BY<\/code> \u304c\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u96c6\u8a08\u3059\u308b\u969b\u306e\u300c\u4ed5\u5207\u308a\u300d\u3084\u300c\u30b0\u30eb\u30fc\u30d7\u300d\u3092\u6307\u5b9a\u3059\u308b\u3082\u306e\u3067\u3001GROUP BY<\/code> \u306b\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001\u884c\u3092\u96c6\u7d04\u3057\u306a\u3044\u70b9\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u8eab\u8fd1\u306a\u4f8b\u3067\u8a00\u3048\u3070\u3001\u300c\u30af\u30e9\u30b9\u5206\u3051\u300d<\/strong>\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002\u5b66\u6821\u5168\u4f53\u306e\u751f\u5f92\u540d\u7c3f\u3092\u898b\u306a\u304c\u3089\u3001\u5404\u751f\u5f92\u306e\u96a3\u306b\u300c\u81ea\u5206\u306e\u30af\u30e9\u30b9\u306e\u5e73\u5747\u70b9\u300d\u3092\u66f8\u304d\u8fbc\u3080\u3088\u3046\u306a\u51e6\u7406\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002<\/p>\n
\u5148\u307b\u3069\u306e\u8ab2\u984c\u3092Window\u95a2\u6570\u3067\u89e3\u6c7a\u3059\u308bSQL\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
SELECT\n  id,\n  name,\n  department,\n  salary,\n  AVG(salary) OVER (PARTITION BY department) AS dept_avg_salary\nFROM\n  employees;\n<\/code><\/pre>\n
\u7d50\u679c<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
id<\/th>\nname<\/th>\ndepartment<\/th>\nsalary<\/th>\ndept_avg_salary<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\n\u4f50\u85e4<\/td>\n\u55b6\u696d\u90e8<\/td>\n500<\/td>\n550<\/strong><\/td>\n<\/tr>\n
2<\/td>\n\u9234\u6728<\/td>\n\u55b6\u696d\u90e8<\/td>\n600<\/td>\n550<\/strong><\/td>\n<\/tr>\n
3<\/td>\n\u9ad8\u6a4b<\/td>\n\u958b\u767a\u90e8<\/td>\n650<\/td>\n700<\/strong><\/td>\n<\/tr>\n
4<\/td>\n\u7530\u4e2d<\/td>\n\u958b\u767a\u90e8<\/td>\n700<\/td>\n700<\/strong><\/td>\n<\/tr>\n
5<\/td>\n\u6e21\u8fba<\/td>\n\u958b\u767a\u90e8<\/td>\n750<\/td>\n700<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u3053\u306e\u3088\u3046\u306b\u3001\u5143\u306e\u884c\u69cb\u9020\u306f\u305d\u306e\u307e\u307e\u306b\u3001PARTITION BY<\/code> \u3067\u533a\u5207\u3089\u308c\u305f\u300c\u55b6\u696d\u90e8\u300d\u300c\u958b\u767a\u90e8\u300d\u305d\u308c\u305e\u308c\u306e\u5e73\u5747\u7d66\u4e0e\u304c\u3001\u5404\u884c\u306b\u6b63\u3057\u304f\u4ed8\u4e0e\u3055\u308c\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u3053\u308c\u304cWindow\u95a2\u6570\u306e\u57fa\u672c\u3067\u3042\u308a\u3001\u6700\u5927\u306e\u5f37\u307f\u3067\u3059\u3002<\/p>\n
\u9806\u4f4d\u4ed8\u3051\u95a2\u6570\u306e\u4f7f\u3044\u5206\u3051\u2502RANK, DENSE_RANK, ROW_NUMBER<\/h2>\n
Window\u95a2\u6570\u304c\u6700\u3082\u6d3b\u8e8d\u3059\u308b\u5834\u9762\u306e\u4e00\u3064\u304c\u3001\u3053\u306e\u300c\u9806\u4f4d\u4ed8\u3051\u300d<\/strong>\u3067\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u306e\u5348\u5f8c\u8a66\u9a13\u3067\u3082\u3001\u300c\u58f2\u4e0a\u4e0a\u4f4d\u306e\u9867\u5ba2\u3092\u62bd\u51fa\u3059\u308b\u300d\u300c\u6210\u7e3e\u9806\u306b\u4e26\u3079\u308b\u300d\u3068\u3044\u3063\u305f\u8981\u4ef6\u3067\u983b\u7e41\u306b\u767b\u5834\u3057\u307e\u3059\u3002<\/p>\n
GROUP BY<\/code> \u3067\u306f\u96e3\u3057\u304b\u3063\u305f\u300c\u30b0\u30eb\u30fc\u30d7\u5185\u3067\u306e\u30e9\u30f3\u30ad\u30f3\u30b0\u4f5c\u6210\u300d\u3092\u7c21\u5358\u306b\u884c\u3048\u307e\u3059\u304c\u3001\u4e00\u3064\u6ce8\u610f\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u306f\u3001\u3082\u3057\u540c\u70b9\u3060\u3063\u305f\u5834\u5408\u3001\u9806\u4f4d\u3092\u3069\u3046\u6271\u3046\u304b<\/strong>\u3067\u3059\u3002<\/p>\n
SQL\u306b\u306f\u3001\u3053\u306e\u300c\u540c\u9806\u4f4d\u306e\u6271\u3044\u65b9\u300d\u304c\u7570\u306a\u308b3\u3064\u306e\u4e3b\u8981\u306a\u9806\u4f4d\u4ed8\u3051\u95a2\u6570\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u3010\u4ed5\u4e8b\u3067\u306e\u5177\u4f53\u4f8b\u3011\u55b6\u696d\u6210\u7e3e\u30e9\u30f3\u30ad\u30f3\u30b0\u3092\u4f5c\u6210\u3059\u308b<\/h3>\n
\u3053\u3053\u306b\u3001\u55b6\u696d\u90e8\u54e1\u306e\u58f2\u4e0a\u6210\u7e3e\u30c7\u30fc\u30bf\u304c\u3042\u308b\u3068\u3057\u307e\u3059\u3002\u540c\u70b9\u306e\u30e1\u30f3\u30d0\u30fc\u304c\u3044\u308b\u70b9\u306b\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u30c6\u30fc\u30d6\u30eb\uff1asales_records<\/code><\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
id<\/th>\nname<\/th>\nsales<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\n\u9060\u85e4<\/td>\n950<\/td>\n<\/tr>\n
2<\/td>\n\u52a0\u85e4<\/td>\n800<\/td>\n<\/tr>\n
3<\/td>\n\u6728\u6751<\/td>\n800<\/td>\n<\/tr>\n
4<\/td>\n\u658e\u85e4<\/td>\n720<\/td>\n<\/tr>\n
5<\/td>\n\u4e2d\u6751<\/td>\n950<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u3053\u306e\u30c7\u30fc\u30bf\u306b\u5bfe\u3057\u30013\u3064\u306e\u95a2\u6570\u3092\u540c\u6642\u306b\u4f7f\u3063\u3066\u58f2\u4e0a\uff08sales<\/code>\uff09\u306e\u9ad8\u3044\u9806\u306b\u30e9\u30f3\u30ad\u30f3\u30b0\u3092\u4ed8\u3051\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u9806\u4f4d\u4ed8\u3051\u306e\u969b\u306f OVER()<\/code> \u53e5\u306e\u4e2d\u3067 ORDER BY<\/code> \u3092\u4f7f\u3046\u306e\u304c\u57fa\u672c\u3067\u3059\u3002<\/p>\n
SELECT\n  name,\n  sales,\n  RANK()       OVER (ORDER BY sales DESC) AS rank_result,\n  DENSE_RANK() OVER (ORDER BY sales DESC) AS dense_rank_result,\n  ROW_NUMBER() OVER (ORDER BY sales DESC) AS row_number_result\nFROM\n  sales_records;\n<\/code><\/pre>\n
\u7d50\u679c<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
name<\/th>\nsales<\/th>\nrank_result<\/th>\ndense_rank_result<\/th>\nrow_number_result<\/th>\n<\/tr>\n<\/thead>\n
\u9060\u85e4<\/td>\n950<\/td>\n1<\/strong><\/td>\n1<\/strong><\/td>\n1<\/td>\n<\/tr>\n
\u4e2d\u6751<\/td>\n950<\/td>\n1<\/strong><\/td>\n1<\/strong><\/td>\n2<\/td>\n<\/tr>\n
\u52a0\u85e4<\/td>\n800<\/td>\n3<\/strong><\/td>\n2<\/strong><\/td>\n3<\/td>\n<\/tr>\n
\u6728\u6751<\/td>\n800<\/td>\n3<\/strong><\/td>\n2<\/strong><\/td>\n4<\/td>\n<\/tr>\n
\u658e\u85e4<\/td>\n720<\/td>\n5<\/strong><\/td>\n3<\/strong><\/td>\n5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u7d50\u679c\u3092\u898b\u6bd4\u3079\u308b\u3068\u3001\u540c\u70b9\uff08950\u70b9\u3068800\u70b9\uff09\u306e\u3068\u304d\u306e\u9806\u4f4d\u306e\u4ed8\u3051\u65b9\u304c\u5168\u304f\u9055\u3046\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n
3\u3064\u306e\u95a2\u6570\u306e\u7279\u5fb4\u3068\u4f7f\u3044\u5206\u3051<\/h3>\n
\u305d\u308c\u305e\u308c\u306e\u95a2\u6570\u306e\u6319\u52d5\u306f\u3001\u4ee5\u4e0b\u306e\u8868\u306e\u3088\u3046\u306b\u307e\u3068\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n\n\n\n\n
\u95a2\u6570<\/th>\n\u540c\u9806\u4f4d\u306e\u6271\u3044<\/th>\n\u6b21\u306e\u9806\u4f4d\u306e\u6271\u3044<\/th>\n\u8eab\u8fd1\u306a\u4f8b\u3048<\/th>\n<\/tr>\n<\/thead>\n
RANK()<\/code><\/strong><\/td>\n\u540c\u3058\u9806\u4f4d\u3092\u5272\u308a\u5f53\u3066\u308b<\/td>\n\u9806\u4f4d\u3092\u98db\u3070\u3059<\/strong>\uff081\u4f4d\u304c2\u4eba\u306a\u3089\u6b21\u306f3\u4f4d\uff09<\/td>\n\u4e00\u822c\u7684\u306a\u7af6\u4e89\u306e\u9806\u4f4d\uff08\u91d1\u30e1\u30c0\u30eb\u304c2\u4eba\u306a\u3089\u9280\u306f\u306a\u3057\uff09<\/td>\n<\/tr>\n
DENSE_RANK()<\/code><\/strong><\/td>\n\u540c\u3058\u9806\u4f4d\u3092\u5272\u308a\u5f53\u3066\u308b<\/td>\n\u9806\u4f4d\u3092\u98db\u3070\u3055\u306a\u3044<\/strong>\uff081\u4f4d\u304c2\u4eba\u3067\u3082\u6b21\u306f2\u4f4d\uff09<\/td>\n\u6b20\u756a\u306e\u306a\u3044\u30e9\u30f3\u30ad\u30f3\u30b0<\/td>\n<\/tr>\n
ROW_NUMBER()<\/code><\/strong><\/td>\n\u540c\u9806\u4f4d\u3092\u8003\u616e\u3057\u306a\u3044<\/strong><\/td>\n\u5e38\u306b1\u305a\u3064\u5897\u52a0\u3059\u308b\u9023\u756a<\/td>\n\u53d7\u4ed8\u756a\u53f7\u3001\u6574\u7406\u5238<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u3010\u5348\u5f8c\u8a66\u9a13\u3067\u306e\u5224\u65ad\u57fa\u6e96\u3011<\/strong>
\u3069\u306e\u95a2\u6570\u3092\u4f7f\u3046\u3079\u304d\u304b\u306f\u3001\u554f\u984c\u6587\u306e\u8981\u4ef6\u6b21\u7b2c\u3067\u3059\u3002<\/p>\n
    \n
  • \u300c\u4e0a\u4f4d3\u540d\u3092\u62bd\u51fa\u305b\u3088\uff08\u540c\u70b9\u8005\u306f\u5168\u54e1\u542b\u3081\u308b\uff09\u300d\u306e\u3088\u3046\u306a\u5834\u5408\u306f\u3001RANK()<\/code> \u304b DENSE_RANK()<\/code> \u3092\u4f7f\u3044\u307e\u3059\u3002\uff08WHERE rank_result <= 3<\/code> \u306e\u3088\u3046\u306b\u5f8c\u7d9a\u51e6\u7406\u3067\u7d5e\u308a\u8fbc\u3080\uff09<\/li>\n
  • \u300c\u9806\u4f4d\u306e\u6b20\u756a\u3092\u8a31\u5bb9\u3057\u306a\u3044\u300d\u3068\u3044\u3063\u305f\u6307\u5b9a\u304c\u3042\u308c\u3070 DENSE_RANK()<\/code> \u3092\u9078\u3073\u307e\u3059\u3002<\/li>\n
  • \u5358\u7d14\u306b\u300c\u5148\u982d\u304b\u3089N\u4ef6\u300d\u3084\u91cd\u8907\u3092\u8a31\u3055\u306a\u3044\u30e6\u30cb\u30fc\u30af\u306a\u9023\u756a\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f ROW_NUMBER()<\/code> \u304c\u6700\u9069\u3067\u3059\u3002<\/li>\n<\/ul>\n
    \u8981\u4ef6\u3092\u6b63\u78ba\u306b\u8aad\u307f\u53d6\u308a\u3001\u6700\u9069\u306a\u95a2\u6570\u3092\u9078\u629e\u3059\u308b\u80fd\u529b\u304c\u554f\u308f\u308c\u307e\u3059\u3002<\/p>\n
    \u884c\u9593\u306e\u30c7\u30fc\u30bf\u64cd\u4f5c\u3092\u5b9f\u73fe\u3059\u308bLAG \/ LEAD\u95a2\u6570<\/h2>\n
    RANK<\/code>\u304c\u300c\u7e26\u65b9\u5411\u300d\u306e\u6bd4\u8f03\u3060\u3068\u3057\u305f\u3089\u3001LAG<\/code>\uff08\u30e9\u30b0\uff09\u3068LEAD<\/code>\uff08\u30ea\u30fc\u30c9\uff09\u306f\u300c\u524d\u5f8c\u65b9\u5411\u300d<\/strong>\u306e\u30c7\u30fc\u30bf\u3092\u53c2\u7167\u3059\u308b\u305f\u3081\u306e\u5f37\u529b\u306a\u95a2\u6570\u3067\u3059\u3002\u3053\u308c\u3089\u3092\u4f7f\u3044\u3053\u306a\u305b\u308b\u3068\u3001\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u306e\u5206\u6790\u304c\u4e00\u6c17\u306b\u697d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
    \u3010\u8eab\u8fd1\u306a\u4f8b\u3048\u3011SNS\u306e\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3<\/h3>\n
    LAG<\/code>\u3068LEAD<\/code>\u306e\u30a4\u30e1\u30fc\u30b8\u306f\u3001SNS\u306e\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u3084\u30d6\u30ed\u30b0\u306e\u8a18\u4e8b\u304c\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n
      \n
    • LAG()<\/code><\/strong>: \u4eca\u898b\u3066\u3044\u308b\u6295\u7a3f\u306e\u300c\u524d\u306e\u6295\u7a3f\u300d<\/strong>\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u3002<\/li>\n
    • LEAD()<\/code><\/strong>: \u4eca\u898b\u3066\u3044\u308b\u6295\u7a3f\u306e\u300c\u6b21\u306e\u6295\u7a3f\u300d<\/strong>\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u3002<\/li>\n<\/ul>\n
      \u3053\u306e\u3088\u3046\u306b\u3001\u73fe\u5728\u306e\u884c\u3092\u57fa\u6e96\u306b\u3001\u6307\u5b9a\u3057\u305f\u9806\u5e8f\u3067\u306e\u300c\u524d\u300d\u3084\u300c\u5f8c\u300d\u306e\u884c\u306b\u3042\u308b\u30c7\u30fc\u30bf\u306b\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u306e\u304c\u7279\u5fb4\u3067\u3059\u3002<\/p>\n
      \u3010\u4ed5\u4e8b\u3067\u306e\u5177\u4f53\u4f8b\u3011\u524d\u6708\u306e\u58f2\u4e0a\u3068\u6bd4\u8f03\u3059\u308b<\/h3>\n
      \u6708\u3054\u3068\u306e\u58f2\u4e0a\u5b9f\u7e3e\u30c7\u30fc\u30bf\u304c\u3042\u308b\u3068\u3057\u307e\u3059\u3002\u3053\u3053\u304b\u3089\u300c\u5404\u6708\u306e\u58f2\u4e0a\u3068\u3001\u305d\u306e\u524d\u6708\u306e\u58f2\u4e0a\u3092\u4e26\u3079\u3066\u8868\u793a\u3057\u3001\u58f2\u4e0a\u306e\u5897\u6e1b\u3092\u5206\u6790\u3057\u305f\u3044\u300d<\/strong>\u3068\u3044\u3046\u30b1\u30fc\u30b9\u306f\u983b\u7e41\u306b\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n
      \u30c6\u30fc\u30d6\u30eb\uff1amonthly_sales<\/code><\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
      month<\/th>\nsales_amount<\/th>\n<\/tr>\n<\/thead>\n
      2025-04<\/td>\n1200<\/td>\n<\/tr>\n
      2025-05<\/td>\n1500<\/td>\n<\/tr>\n
      2025-06<\/td>\n1400<\/td>\n<\/tr>\n
      2025-07<\/td>\n1800<\/td>\n<\/tr>\n
      2025-08<\/td>\n1750<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \u3053\u306e\u8ab2\u984c\u3092LAG<\/code>\u95a2\u6570\u3067\u89e3\u6c7a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002LAG<\/code>\u306f\u300cL…Late\uff08\u9045\u3044\u3001\u904e\u53bb\uff09\u300d\u3068\u899a\u3048\u308b\u3068\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002\u300c\u4f55\u9806\u3067\u524d\u5f8c\u306e\u884c\u3092\u898b\u308b\u304b\u300d\u3092\u6307\u5b9a\u3059\u308b\u305f\u3081\u3001OVER()<\/code>\u53e5\u306e\u4e2d\u306eORDER BY<\/code>\u304c\u5fc5\u9808\u3067\u3059\u3002<\/p>\n
      SELECT\n  month,\n  sales_amount,\n  LAG(sales_amount, 1, 0) OVER (ORDER BY month) AS previous_month_sales\nFROM\n  monthly_sales;\n<\/code><\/pre>\n
      LAG(sales_amount, 1, 0)<\/code> \u306e\u90e8\u5206\u306f\u3001\u4ee5\u4e0b\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n
        \n
      • sales_amount<\/code><\/strong>: \u53d6\u5f97\u3057\u305f\u3044\u30c7\u30fc\u30bf\u3092\u6301\u3064\u5217\uff08\u524d\u6708\u306e\u58f2\u4e0a\u9ad8\uff09<\/li>\n
      • 1<\/code><\/strong>: \u4f55\u884c\u524d\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u304b\uff081\u884c\u524d = \u524d\u6708\uff09<\/li>\n
      • 0<\/code><\/strong>: \u53c2\u7167\u3059\u308b\u884c\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\uff08\u4f8b\uff1a\u6700\u521d\u306e\u884c\uff09\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024<\/li>\n<\/ul>\n
        \u7d50\u679c<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
        month<\/th>\nsales_amount<\/th>\nprevious_month_sales<\/th>\n<\/tr>\n<\/thead>\n
        2025-04<\/td>\n1200<\/td>\n0<\/strong><\/td>\n<\/tr>\n
        2025-05<\/td>\n1500<\/td>\n1200<\/strong><\/td>\n<\/tr>\n
        2025-06<\/td>\n1400<\/td>\n1500<\/strong><\/td>\n<\/tr>\n
        2025-07<\/td>\n1800<\/td>\n1400<\/strong><\/td>\n<\/tr>\n
        2025-08<\/td>\n1750<\/td>\n1800<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        \u898b\u4e8b\u306b\u3001\u5404\u6708\u306esales_amount<\/code>\u306e\u96a3\u306b\u3001\u524d\u6708\u306e\u58f2\u4e0a\u9ad8previous_month_sales<\/code>\u304c\u8868\u793a\u3055\u308c\u307e\u3057\u305f\u3002\u6700\u521d\u306e\u884c\u3067\u3042\u308b4\u6708\u306f\u524d\u6708\u304c\u5b58\u5728\u3057\u306a\u3044\u305f\u3081\u3001\u6307\u5b9a\u3057\u305f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e 0<\/code> \u304c\u5165\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
        \u3053\u308c\u306b\u3088\u308a\u3001sales_amount - previous_month_sales<\/code> \u3092\u8a08\u7b97\u3059\u308c\u3070\u3001\u7c21\u5358\u306b\u524d\u6708\u6bd4\u306e\u5dee\u984d\u3092\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002LEAD<\/code>\u95a2\u6570\u306f\u3053\u306e\u9006\u3067\u3001\u6307\u5b9a\u3057\u305f\u884c\u6570\u3060\u3051\u300c\u672a\u6765\u300d\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n
        LAG<\/code>\/LEAD<\/code>\u306f\u3001\u5348\u5f8c\u8a66\u9a13\u3067\u79fb\u52d5\u5e73\u5747\u3084\u5dee\u5206\u8a08\u7b97\u304c\u554f\u308f\u308c\u305f\u969b\u306b\u3001\u601d\u8003\u3092\u30b7\u30f3\u30d7\u30eb\u306b\u3057\u3001SQL\u3092\u7c21\u6f54\u306b\u8a18\u8ff0\u3059\u308b\u305f\u3081\u306e\u5f37\u529b\u306a\u6b66\u5668\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
        \u9ad8\u5ea6\u306a\u96c6\u8a08\u3092\u5b9f\u73fe\u3059\u308b\u30d5\u30ec\u30fc\u30e0\u53e5\u2502ROWS BETWEEN\u3092\u4f7f\u3044\u3053\u306a\u3059<\/h2>\n
        PARTITION BY<\/code>\u304c\u300c\u3069\u306e\u30b0\u30eb\u30fc\u30d7\u3067\u96c6\u8a08\u3059\u308b\u304b\u300d\u3068\u3044\u3046\u5168\u4f53<\/strong>\u306e\u7a93\uff08Window\uff09\u3092\u5b9a\u7fa9\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001\u30d5\u30ec\u30fc\u30e0\u53e5\u306f\u3001\u305d\u306e\u7a93\u306e\u4e2d\u3067\u3055\u3089\u306b\u300c\u3069\u306e\u7bc4\u56f2\u306e\u884c\u3092\u8a08\u7b97\u306b\u542b\u3081\u308b\u304b\u300d<\/strong>\u3068\u3044\u3046\u3001\u3088\u308a\u52d5\u7684\u306a\u5c0f\u7a93\uff08\u30d5\u30ec\u30fc\u30e0\uff09\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n
        \u3053\u308c\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308c\u3070\u3001\u300c\u79fb\u52d5\u5e73\u5747\u300d\u3084\u300c\u7d2f\u7a4d\u5408\u8a08\u300d\u3068\u3044\u3063\u305f\u9ad8\u5ea6\u306a\u5206\u6790\u304cSQL\u3060\u3051\u3067\u5b8c\u7d50\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
        \u3010\u56f3\u89e3\u3011\u30d5\u30ec\u30fc\u30e0\u53e5\u306e\u30a4\u30e1\u30fc\u30b8<\/h3>\n
        \u30d5\u30ec\u30fc\u30e0\u53e5\u306f\u3001\u300c\u30ab\u30ec\u30f3\u30c8\u884c\uff08\u73fe\u5728\u51e6\u7406\u4e2d\u306e\u884c\uff09\u3092\u57fa\u6e96\u306b\u3001\u4e0a\u4e0b\u4f55\u884c\u76ee\u307e\u3067\u3092\u8a08\u7b97\u7bc4\u56f2\u3068\u3059\u308b\u304b\u300d<\/strong>\u3092\u6307\u5b9a\u3059\u308b\u6a5f\u80fd\u3067\u3059\u3002\u307e\u308b\u3067\u3001\u9577\u3044\u30c7\u30fc\u30bf\u306e\u5e2f\u306e\u4e0a\u3092\u30b9\u30e9\u30a4\u30c9\u3057\u3066\u3044\u304f\u5c0f\u7a93\u306e\u3088\u3046\u306a\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/p>\n<\/p>\n
        \u3053\u306e\u300c\u5c0f\u7a93\u300d\u306e\u7bc4\u56f2\u3092\u5b9a\u7fa9\u3059\u308b\u306e\u304c ROWS BETWEEN ... AND ...<\/code> \u3068\u3044\u3046\u69cb\u6587\u3067\u3059\u3002<\/p>\n
        \u3010\u4ed5\u4e8b\u3067\u306e\u5177\u4f53\u4f8b\u3011\u300c\u76f4\u8fd13\u65e5\u9593\u306e\u79fb\u52d5\u5e73\u5747\u58f2\u4e0a\u300d\u3092\u8a08\u7b97\u3059\u308b<\/h3>\n
        \u65e5\u3005\u306e\u58f2\u4e0a\u30c7\u30fc\u30bf\u304b\u3089\u3001\u65e5\u3005\u306e\u5909\u52d5\u3092\u306a\u3089\u3057\u3066\u50be\u5411\u3092\u63b4\u3080\u305f\u3081\u306b\u300c\u79fb\u52d5\u5e73\u5747\u300d\u3092\u7b97\u51fa\u3059\u308b\u3001\u3068\u3044\u3046\u5834\u9762\u3092\u8003\u3048\u307e\u3059\u3002<\/p>\n
        \u30c6\u30fc\u30d6\u30eb\uff1adaily_sales<\/code><\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
        sales_date<\/th>\nsales_amount<\/th>\n<\/tr>\n<\/thead>\n
        2025-09-01<\/td>\n50<\/td>\n<\/tr>\n
        2025-09-02<\/td>\n70<\/td>\n<\/tr>\n
        2025-09-03<\/td>\n60<\/td>\n<\/tr>\n
        2025-09-04<\/td>\n90<\/td>\n<\/tr>\n
        2025-09-05<\/td>\n85<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        \u3053\u306e\u30c7\u30fc\u30bf\u3092\u4f7f\u3063\u3066\u3001\u300c\u5f53\u65e5\u3092\u542b\u3080\u76f4\u8fd13\u65e5\u9593\u306e\u5e73\u5747\u58f2\u4e0a\u300d\u3092\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002SQL\u3067\u306f ROWS BETWEEN 2 PRECEDING AND CURRENT ROW<\/code> \u3068\u3044\u3046\u69cb\u6587\u3092\u4f7f\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u300c2\u884c\u524d\u304b\u3089\u3001\u30ab\u30ec\u30f3\u30c8\u884c\uff08\u5f53\u65e5\uff09\u307e\u3067\u300d<\/strong>\u3092\u8a08\u7b97\u7bc4\u56f2\u306b\u6307\u5b9a\u3059\u308b\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002<\/p>\n
        SELECT\n  sales_date,\n  sales_amount,\n  AVG(sales_amount) OVER (\n    ORDER BY sales_date\n    ROWS BETWEEN 2 PRECEDING AND CURRENT ROW\n  ) AS moving_avg_3days\nFROM\n  daily_sales;\n<\/code><\/pre>\n
        \u8a08\u7b97\u7bc4\u56f2\u306e\u52d5\u304d<\/h4>\n
        \u3053\u306eSQL\u304c\u3069\u306e\u3088\u3046\u306b\u52d5\u304f\u304b\u3001\u30ab\u30ec\u30f3\u30c8\u884c\u304c 2025-09-04<\/code> \u306e\u5834\u5408\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
          \n
        • \u30ab\u30ec\u30f3\u30c8\u884c<\/strong>: 2025-09-04 (\u58f2\u4e0a: 90)<\/li>\n
        • 1\u884c\u524d<\/strong>: 2025-09-03 (\u58f2\u4e0a: 60)<\/li>\n
        • 2\u884c\u524d<\/strong>: 2025-09-02 (\u58f2\u4e0a: 70)<\/li>\n
        • \u8a08\u7b97\u7bc4\u56f2 (\u30d5\u30ec\u30fc\u30e0)<\/strong>: \u4e0a\u8a18\u306e3\u884c<\/li>\n
        • \u8a08\u7b97\u5185\u5bb9<\/strong>: (70 + 60 + 90) \/ 3 = 73.3<\/code><\/li>\n<\/ul>\n
          \u7d50\u679c<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
          sales_date<\/th>\nsales_amount<\/th>\nmoving_avg_3days<\/th>\n<\/tr>\n<\/thead>\n
          2025-09-01<\/td>\n50<\/td>\n50.0<\/td>\n<\/tr>\n
          2025-09-02<\/td>\n70<\/td>\n60.0<\/td>\n<\/tr>\n
          2025-09-03<\/td>\n60<\/td>\n60.0<\/td>\n<\/tr>\n
          2025-09-04<\/td>\n90<\/td>\n73.3<\/td>\n<\/tr>\n
          2025-09-05<\/td>\n85<\/td>\n78.3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
          \u6700\u521d\u306e2\u884c\u306f\u3001\u6307\u5b9a\u3057\u305f3\u65e5\u5206\u306e\u30c7\u30fc\u30bf\u304c\u5b58\u5728\u3057\u306a\u3044\u305f\u3081\u3001\u8a08\u7b97\u3067\u304d\u308b\u7bc4\u56f2\u3060\u3051\u3067\u5e73\u5747\u304c\u7b97\u51fa\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3001\u884c\u304c\u4e00\u3064\u9032\u3080\u3054\u3068\u306b\u5bfe\u8c61\u30d5\u30ec\u30fc\u30e0\u304c\u30b9\u30e9\u30a4\u30c9\u3057\u3066\u3044\u304f\u306e\u304c\u7279\u5fb4\u3067\u3059\u3002<\/p>\n
          \u30d5\u30ec\u30fc\u30e0\u53e5\u306e\u4e3b\u306a\u6307\u5b9a\u65b9\u6cd5<\/h4>\n\n\n\n\n\n\n\n
          \u6307\u5b9a\u65b9\u6cd5<\/th>\n\u610f\u5473<\/th>\n\u4e3b\u306a\u7528\u9014<\/th>\n<\/tr>\n<\/thead>\n
          ROWS BETWEEN 2 PRECEDING AND CURRENT ROW<\/code><\/td>\n2\u884c\u524d\u304b\u3089\u30ab\u30ec\u30f3\u30c8\u884c\u307e\u3067<\/td>\n\u79fb\u52d5\u5e73\u5747<\/strong><\/td>\n<\/tr>\n
          ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW<\/code><\/td>\n\u5148\u982d\u884c\u304b\u3089\u30ab\u30ec\u30f3\u30c8\u884c\u307e\u3067<\/td>\n\u7d2f\u7a4d\u5408\u8a08<\/strong><\/td>\n<\/tr>\n
          ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING<\/code><\/td>\n1\u884c\u524d\u304b\u30891\u884c\u5f8c\u307e\u3067<\/td>\n\u524d\u5f8c\u3092\u542b\u3081\u305f\u5e73\u6ed1\u5316<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
          \u30d5\u30ec\u30fc\u30e0\u53e5\u306f\u4e00\u898b\u3059\u308b\u3068\u8907\u96d1\u3067\u3059\u304c\u3001\u300c\u30ab\u30ec\u30f3\u30c8\u884c\u3092\u57fa\u6e96\u3068\u3057\u305f\u8a08\u7b97\u7bc4\u56f2\u306e\u6307\u5b9a\u300d\u3068\u3044\u3046\u30b3\u30a2\u306a\u6982\u5ff5\u3055\u3048\u63b4\u3081\u3070\u3001\u5348\u5f8c\u8a66\u9a13\u306e\u8907\u96d1\u306a\u96c6\u8a08\u554f\u984c\u306b\u3082\u67d4\u8edf\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u7a76\u6975\u306e\u6b66\u5668\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
          \u307e\u3068\u3081\uff1aWindow\u95a2\u6570\u3092\u6b66\u5668\u306b\u5348\u5f8c\u8a66\u9a13\u3092\u7a81\u7834\u3057\u3088\u3046<\/h2>\n
          \u4eca\u56de\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u306e\u5348\u5f8c\u554f\u984c\u3067\u6700\u983b\u51fa\u30c6\u30fc\u30de\u3067\u3042\u308b\u300cWindow\u95a2\u6570\u300d\u306b\u3064\u3044\u3066\u3001\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u3092\u5177\u4f53\u7684\u306aSQL\u4f8b\u3068\u5171\u306b\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002<\/p>\n
          \u6700\u521d\u306f\u8907\u96d1\u306b\u898b\u3048\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u4e00\u3064\u4e00\u3064\u306e\u95a2\u6570\u306e\u5f79\u5272\u3068\u52d5\u304d\u3092\u7406\u89e3\u3059\u308c\u3070\u3001\u3053\u308c\u307b\u3069\u983c\u308a\u306b\u306a\u308b\u6b66\u5668\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u6700\u5f8c\u306b\u3001\u672c\u8a18\u4e8b\u3067\u5b66\u3093\u3060\u91cd\u8981\u30dd\u30a4\u30f3\u30c8\u3092\u632f\u308a\u8fd4\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n
            \n
          • PARTITION BY<\/code>\u304c\u57fa\u672c\u306e\u30ad<\/strong>
            GROUP BY<\/code>\u3068\u306f\u7570\u306a\u308a\u3001\u5143\u306e\u884c\u3092\u96c6\u7d04\u305b\u305a\u306b\u300c\u30b0\u30eb\u30fc\u30d7\u5206\u3051\u300d\u3060\u3051\u3092\u884c\u3046Window\u95a2\u6570\u306e\u5fc3\u81d3\u90e8\u3067\u3059\u3002<\/li>\n
          • \u9806\u4f4d\u4ed8\u3051\u306f3\u5144\u5f1f\u3092\u4f7f\u3044\u5206\u3051\u308b<\/strong>
            RANK()<\/code>, DENSE_RANK()<\/code>, ROW_NUMBER()<\/code>\u306f\u3001\u540c\u9806\u4f4d\u306e\u6271\u3044\u65b9\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u554f\u984c\u6587\u306e\u8981\u4ef6\u3092\u6b63\u78ba\u306b\u8aad\u307f\u53d6\u308a\u3001\u6700\u9069\u306a\u95a2\u6570\u3092\u9078\u3073\u307e\u3057\u3087\u3046\u3002<\/li>\n
          • \u6642\u7cfb\u5217\u5206\u6790\u306a\u3089LAG<\/code> \/ LEAD<\/code><\/strong>
            \u73fe\u5728\u306e\u884c\u3092\u57fa\u6e96\u306b\u300c\u524d\u5f8c\u306e\u884c\u300d\u306e\u30c7\u30fc\u30bf\u3092\u76f4\u63a5\u53c2\u7167\u3067\u304d\u307e\u3059\u3002\u524d\u6708\u6bd4\u306e\u8a08\u7b97\u306a\u3069\u3067\u7d76\u5927\u306a\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<\/li>\n
          • \u79fb\u52d5\u5e73\u5747\u30fb\u7d2f\u7a4d\u306f\u30d5\u30ec\u30fc\u30e0\u53e5\u3067<\/strong>
            ROWS BETWEEN ...<\/code>\u3092\u4f7f\u3044\u3053\u306a\u305b\u3070\u3001\u79fb\u52d5\u5e73\u5747\u3084\u7d2f\u7a4d\u5408\u8a08\u3068\u3044\u3063\u305f\u3001\u3088\u308a\u9ad8\u5ea6\u3067\u5b9f\u8df5\u7684\u306a\u30c7\u30fc\u30bf\u5206\u6790\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n
            Window\u95a2\u6570\u306e\u672c\u8cea\u306f\u3001\u300c\u5143\u306e\u884c\u306e\u69cb\u9020\u3092\u4fdd\u3063\u305f\u307e\u307e\u30011\u3064\u306e\u30af\u30a8\u30ea\u3067\u67d4\u8edf\u306a\u96c6\u8a08\u3068\u5206\u6790\u3092\u5b8c\u7d50\u3055\u305b\u308b\u529b\u300d<\/strong>\u306b\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u4f7f\u3044\u3053\u306a\u305b\u308b\u304b\u3069\u3046\u304b\u306f\u3001\u5348\u5f8c\u8a66\u9a13\u306e\u5f97\u70b9\u3092\u5927\u304d\u304f\u5de6\u53f3\u3057\u307e\u3059\u3002<\/p>\n
            \u77e5\u8b58\u3068\u3057\u3066\u7406\u89e3\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u305c\u3072\u304a\u624b\u5143\u306e\u74b0\u5883\u3067\u69d8\u3005\u306aSQL\u3092\u8a66\u3057\u3001\u305d\u306e\u52d5\u304d\u3092\u4f53\u611f\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u624b\u3092\u52d5\u304b\u3057\u3066\u8a66\u884c\u932f\u8aa4\u3059\u308b\u3053\u3068\u304c\u3001\u5408\u683c\u3078\u306e\u4e00\u756a\u306e\u8fd1\u9053\u3067\u3059\u3002<\/p>\n
            \u6b21\u56de\u306f\u3001\u672c\u8a18\u4e8b\u3068\u4e26\u3093\u3067\u91cd\u8981\u306a\u30c6\u30fc\u30de\u3067\u3042\u308b\u300e\u7b2c2\u56de\uff1aJOIN\u30fb\u30b5\u30d6\u30af\u30a8\u30ea\u30fb\u96c6\u5408\u6f14\u7b97\u30de\u30b9\u30bf\u30fc\u7de8\u300f<\/strong>\u3092\u304a\u5c4a\u3051\u3057\u307e\u3059\u3002\u8907\u6570\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u81ea\u5728\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6df1\u6398\u308a\u3057\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u3054\u671f\u5f85\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
            \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u306e\u5348\u5f8c\u554f\u984c\u3001\u7279\u306bSQL\u306e\u8a18\u8ff0\u3067\u300c\u3069\u3046\u66f8\u3051\u3070\u3044\u3044\u3093\u3060\u2026\u300d\u3068\u624b\u304c\u6b62\u307e\u3063\u3066\u3057\u307e\u3063\u305f\u7d4c\u9a13\u306f\u3042\u308a\u307e\u305b\u3093\u304b\uff1f\u8fd1\u5e74\u306e\u8a66\u9a13\u3067\u306f\u3001\u5358\u306a\u308b\u30c7\u30fc\u30bf\u62bd\u51fa\u3060\u3051\u3067\u306a\u304f\u3001\u3088\u308a\u9ad8\u5ea6\u3067\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u5206\u6790\u529b\u304c … <\/p>\n","protected":false},"author":2,"featured_media":0,"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-5910","post","type-post","status-publish","format-standard","hentry","category-ipa","tag-6"],"_links":{"self":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/posts\/5910","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=5910"}],"version-history":[{"count":0,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/posts\/5910\/revisions"}],"wp:attachment":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/media?parent=5910"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/categories?post=5910"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/tags?post=5910"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}