{"id":6399,"date":"2026-07-01T16:11:24","date_gmt":"2026-07-01T07:11:24","guid":{"rendered":"https:\/\/route-zero.com\/recruit\/?post_type=route&p=6399"},"modified":"2026-10-01T16:11:39","modified_gmt":"2026-10-01T07:11:39","slug":"sql-merge-upsert-difference","status":"publish","type":"route","link":"https:\/\/route-zero.com\/recruit\/route\/6399\/","title":{"rendered":"SQL MERGE\u3068UPSERT\u306e\u9055\u3044\uff5cDB\u5225\u306b\u6574\u7406"},"content":{"rendered":"

INSERT\u3057\u305f\u3044\u884c\u304c\u3059\u3067\u306b\u5b58\u5728\u3057\u305f\u3089UPDATE\u3057\u305f\u3044\u2015\u2015\u3053\u306e\u51e6\u7406\u306f\u3088\u304f\u300cUPSERT\u300d\u3068\u547c\u3070\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001UPSERT\u306f1\u3064\u306e\u5171\u901aSQL\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u306f\u306a\u304f\u3001DB\u3054\u3068\u306b\u69cb\u6587\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u3055\u3089\u306bMERGE\u306f\u3001source\u3068target\u3092\u7167\u5408\u3057\u3066\u8907\u6570\u306e\u6761\u4ef6\u5206\u5c90\u3092\u884c\u3048\u308b\u305f\u3081\u3001\u5358\u7d14\u306aunique conflict\u51e6\u7406\u3068\u306f\u5f79\u5272\u304c\u5c11\u3057\u9055\u3044\u307e\u3059\u3002<\/p>\n

\u307e\u305a\u6bd4\u8f03\uff1aMERGE\u3068UPSERT\u7cfb\u69cb\u6587\u306f\u4f55\u304c\u9055\u3046\uff1f<\/h2>\n\n\n\n\n\n\n\n\n\n
\u89b3\u70b9<\/th>\nMERGE<\/th>\nUPSERT\u7cfb\u69cb\u6587<\/th>\n<\/tr>\n<\/thead>\n
\u4e3b\u306a\u76ee\u7684<\/td>\nsource\u3068target\u3092\u7167\u5408\u3057\u3001\u6761\u4ef6\u3054\u3068\u306bINSERT\/UPDATE\/DELETE<\/td>\nINSERT\u6642\u306e\u91cd\u8907\u30fb\u7af6\u5408\u3092\u8d77\u70b9\u306bINSERT\u307e\u305f\u306fUPDATE<\/td>\n<\/tr>\n
\u5224\u5b9a\u57fa\u6e96<\/td>\nJOIN\u6761\u4ef6\u3068WHEN\u53e5<\/td>\nUNIQUE\/PRIMARY KEY\u306a\u3069\u306e\u7af6\u5408<\/td>\n<\/tr>\n
PostgreSQL\u4f8b<\/td>\nMERGE<\/td>\nINSERT … ON CONFLICT<\/td>\n<\/tr>\n
MySQL\u4f8b<\/td>\n\u88fd\u54c1\/version\u4ed5\u69d8\u3092\u78ba\u8a8d<\/td>\nINSERT … ON DUPLICATE KEY UPDATE<\/td>\n<\/tr>\n
\u5411\u304f\u51e6\u7406<\/td>\n\u540c\u671f\u30fb\u4e00\u62ec\u53d6\u8fbc\u30fb\u8907\u6570\u5206\u5c90<\/td>\n\u4e00\u610f\u30ad\u30fc\u5358\u4f4d\u306e\u767b\u9332\/\u66f4\u65b0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

PostgreSQL\u306e\u516c\u5f0f\u8cc7\u6599\u3067\u3082\u3001MERGE\u3068INSERT … ON CONFLICT\u306b\u306f\u9055\u3044\u3068\u5236\u7d04\u304c\u3042\u308a\u3001\u76f8\u4e92\u306b\u7f6e\u304d\u63db\u3048\u53ef\u80fd\u3067\u306f\u306a\u3044\u3068\u8aac\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305a\u300csource\u3068\u306e\u7167\u5408\u304c\u5fc5\u8981\u304b\u300d\u300cunique conflict\u3060\u3051\u51e6\u7406\u3057\u305f\u3044\u304b\u300d\u3067\u5206\u3051\u308b\u3068\u9078\u3073\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n

\n

UPSERT\u306f\u300eINSERT\u307e\u305f\u306fUPDATE\u300f\u3068\u3044\u3046\u51e6\u7406\u30d1\u30bf\u30fc\u30f3<\/h2>\n
\n

\u7528\u8a9e\u89e3\u8aac\uff1aUPSERT<\/strong>
INSERT\u3057\u3001\u65e2\u5b58\u884c\u3068\u306e\u7af6\u5408\u304c\u3042\u308c\u3070UPDATE\u3059\u308b\u51e6\u7406\u30d1\u30bf\u30fc\u30f3\u306e\u901a\u79f0\u3067\u3059\u3002\u5177\u4f53\u7684\u306a\u69cb\u6587\u306fDB\u88fd\u54c1\u3054\u3068\u306b\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/blockquote>\n

\u305f\u3068\u3048\u3070\u30e6\u30fc\u30b6\u30fcID\u3084\u5546\u54c1\u30b3\u30fc\u30c9\u306e\u3088\u3046\u306a\u4e00\u610f\u30ad\u30fc\u3067\u3001\u5b58\u5728\u3057\u306a\u3051\u308c\u3070\u8ffd\u52a0\u3001\u5b58\u5728\u3059\u308c\u3070\u66f4\u65b0\u3057\u305f\u3044\u30b1\u30fc\u30b9\u304c\u5178\u578b\u3067\u3059\u3002\u30a2\u30d7\u30ea\u5074\u3067SELECT\u2192INSERT\/UPDATE\u3068\u5206\u5c90\u3055\u305b\u308b\u4ee3\u308f\u308a\u306b\u3001DB\u5074\u306e\u7af6\u5408\u51e6\u7406\u69cb\u6587\u3092\u4f7f\u3048\u307e\u3059\u3002<\/p>\n

\n

PostgreSQL\uff1a\u5358\u7d14\u306aUPSERT\u306a\u3089ON CONFLICT<\/h2>\n

PostgreSQL\u3067\u306f`INSERT … ON CONFLICT`\u3092\u4f7f\u3044\u3001unique constraint\u3084unique index\u306e\u7af6\u5408\u6642\u306b`DO NOTHING`\u307e\u305f\u306f`DO UPDATE`\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n

INSERT INTO users (id, name, updated_at)\r\nVALUES (101, 'Sato', CURRENT_TIMESTAMP)\r\nON CONFLICT (id)\r\nDO UPDATE SET\r\n  name = EXCLUDED.name,\r\n  updated_at = EXCLUDED.updated_at;<\/code><\/pre>\n
`ON CONFLICT DO UPDATE`\u306f\u3001\u63d0\u6848\u3055\u308c\u305f\u5404\u884c\u306b\u3064\u3044\u3066INSERT\u3059\u308b\u304b\u3001\u6307\u5b9a\u3057\u305f\u7af6\u5408\u5bfe\u8c61\u306b\u3076\u3064\u304b\u3063\u305f\u65e2\u5b58\u884c\u3092UPDATE\u3057\u307e\u3059\u3002unique conflict\u304c\u5224\u65ad\u8ef8\u306a\u3089\u3001\u610f\u56f3\u3092\u8aad\u307f\u53d6\u308a\u3084\u3059\u3044\u9078\u629e\u80a2\u3067\u3059\u3002<\/p>\n
\n
PostgreSQL\uff1asource\u3068target\u3092\u7167\u5408\u3059\u308b\u306a\u3089MERGE<\/h2>\n
MERGE\u306f`USING`\u306edata source\u3068target table\u3092JOIN\u6761\u4ef6\u3067\u7167\u5408\u3057\u3001`WHEN MATCHED`\u3084`WHEN NOT MATCHED`\u3054\u3068\u306b\u51e6\u7406\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002PostgreSQL 18\u3067\u306fINSERT\u3001UPDATE\u3001DELETE\u3001DO NOTHING\u3092\u6761\u4ef6\u4ed8\u304d\u3067\u7d44\u307f\u5408\u308f\u305b\u3089\u308c\u307e\u3059\u3002<\/p>\n
MERGE INTO products AS target\r\nUSING import_products AS src\r\nON target.id = src.id\r\nWHEN MATCHED THEN\r\n  UPDATE SET price = src.price\r\nWHEN NOT MATCHED THEN\r\n  INSERT (id, name, price)\r\n  VALUES (src.id, src.name, src.price);<\/code><\/pre>\n
CSV\u53d6\u8fbc\u5f8c\u306estaging table\u3068\u672c\u756atable\u3092\u540c\u671f\u3059\u308b\u3088\u3046\u306b\u3001source\u96c6\u5408\u3092\u57fa\u6e96\u306b\u8907\u6570\u884c\u3092\u51e6\u7406\u3057\u305f\u3044\u5834\u5408\u306fMERGE\u306e\u5f62\u304c\u81ea\u7136\u3067\u3059\u3002\u8907\u6570\u306eWHEN\u6761\u4ef6\u3092\u4f7f\u3046\u5834\u5408\u306f\u3001\u4e0a\u304b\u3089\u6700\u521d\u306btrue\u306b\u306a\u3063\u305faction\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n
MySQL\uff1aON DUPLICATE KEY UPDATE\u3092\u4f7f\u3046<\/h2>\n
MySQL 8.4\u3067\u306f`INSERT … ON DUPLICATE KEY UPDATE`\u3092\u4f7f\u3048\u307e\u3059\u3002INSERT\u3057\u3088\u3046\u3068\u3057\u305f\u884c\u304cPRIMARY KEY\u307e\u305f\u306fUNIQUE index\u306e\u91cd\u8907\u3092\u8d77\u3053\u3059\u5834\u5408\u3001\u65e2\u5b58\u884c\u3092UPDATE\u3057\u307e\u3059\u3002<\/p>\n
INSERT INTO users (id, name, updated_at)\r\nVALUES (101, 'Sato', CURRENT_TIMESTAMP) AS new\r\nON DUPLICATE KEY UPDATE\r\n  name = new.name,\r\n  updated_at = new.updated_at;<\/code><\/pre>\n
MySQL\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3067\u306f\u3001\u8907\u6570\u306eunique index\u304c\u3042\u308btable\u3067\u306e\u5229\u7528\u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u65e7\u6765\u306e`VALUES(column)`\u53c2\u7167\u306f\u975e\u63a8\u5968\u306e\u305f\u3081\u3001\u73fe\u884c8.4\u3067\u306frow alias\u3092\u4f7f\u3046\u66f8\u304d\u65b9\u3082\u78ba\u8a8d\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n
\u3069\u3061\u3089\u3092\u9078\u3076\uff1f\u5b9f\u52d9\u306e\u5224\u65ad\u57fa\u6e96<\/h2>\n\n\n\n\n\n\n\n\n\n
\u3084\u308a\u305f\u3044\u3053\u3068<\/th>\n\u5019\u88dc<\/th>\n<\/tr>\n<\/thead>\n
\u4e00\u610f\u30ad\u30fc\u304c\u91cd\u8907\u3057\u305f\u3089\u305d\u306e\u884c\u3092\u66f4\u65b0<\/td>\nPostgreSQL ON CONFLICT \/ MySQL ON DUPLICATE KEY UPDATE<\/td>\n<\/tr>\n
source table\u3068target table\u3092\u7167\u5408\u3057\u3066\u540c\u671f<\/td>\nMERGE<\/td>\n<\/tr>\n
matched\u6642\u306b\u3082\u6761\u4ef6\u3092\u5206\u3051\u305f\u3044<\/td>\nMERGE<\/td>\n<\/tr>\n
\u7af6\u5408\u6642\u306f\u4f55\u3082\u3057\u306a\u3044<\/td>\nPostgreSQL ON CONFLICT DO NOTHING\u306a\u3069DB\u56fa\u6709\u69cb\u6587<\/td>\n<\/tr>\n
\u8907\u6570DB\u3067\u540c\u3058SQL\u3092\u4f7f\u3044\u305f\u3044<\/td>\n\u5404DB\u306e\u5bfe\u5fdc\u69cb\u6587\u30fbversion\u3092\u5148\u306b\u78ba\u8a8d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u300c1\u6587\u3067\u66f8\u3051\u308b\u304b\u300d\u3060\u3051\u3067\u9078\u3076\u3068\u3001\u7af6\u5408\u6761\u4ef6\u3084\u540c\u6642\u5b9f\u884c\u6642\u306e\u6319\u52d5\u3092\u898b\u843d\u3068\u3057\u307e\u3059\u3002unique key\u3001source\u306e\u91cd\u8907\u3001transaction isolation\u3001\u5bfe\u8c61DB\u306eversion\u3092\u542b\u3081\u3066\u30c6\u30b9\u30c8\u3057\u307e\u3059\u3002<\/p>\n
\u6ce8\u610f\u70b9\uff1aDB\u56fa\u6709\u306e\u6319\u52d5\u307e\u3067\u540c\u3058\u3067\u306f\u306a\u3044<\/h2>\n
    \n
  • UPSERT\u3068\u3044\u3046\u540d\u524d\u3060\u3051\u3067\u69cb\u6587\u3092\u6c7a\u3081\u305a\u3001\u5bfe\u8c61DB\u306e\u516c\u5f0f\u69cb\u6587\u3092\u78ba\u8a8d\u3059\u308b<\/li>\n
  • \u3069\u306eUNIQUE\/PRIMARY KEY\u304c\u7af6\u5408\u5224\u5b9a\u306b\u4f7f\u308f\u308c\u308b\u304b\u78ba\u8a8d\u3059\u308b<\/li>\n
  • MERGE\u306esource\u304c\u540c\u3058target row\u3078\u8907\u6570\u56de\u5bfe\u5fdc\u3057\u306a\u3044\u3088\u3046\u78ba\u8a8d\u3059\u308b<\/li>\n
  • \u8907\u6570unique key\u304c\u3042\u308b\u5834\u5408\u306eDB\u56fa\u6709\u6319\u52d5\u3092\u78ba\u8a8d\u3059\u308b<\/li>\n
  • \u540c\u6642\u5b9f\u884c\u6642\u306e\u6319\u52d5\u306ftransaction\/isolation\u3092\u542b\u3081\u3066\u691c\u8a3c\u3059\u308b<\/li>\n<\/ul>\n
    \u69cb\u6587\u304c\u4f3c\u3066\u3044\u3066\u3082\u3001\u7af6\u5408\u5224\u5b9a\u30fb\u6a29\u9650\u30fbtrigger\u30fbconcurrency\u306e\u8a73\u7d30\u306fDB\u88fd\u54c1\u3084version\u3067\u7570\u306a\u308a\u307e\u3059\u3002migration\u6642\u306fSQL\u306e\u898b\u305f\u76ee\u3060\u3051\u3067\u7f6e\u304d\u63db\u3048\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n
    \u307e\u3068\u3081\uff1aunique conflict\u304bsource\u540c\u671f\u304b\u3067\u9078\u3076<\/h2>\n
      \n
    • UPSERT\u306fINSERT\u307e\u305f\u306fUPDATE\u306e\u51e6\u7406\u30d1\u30bf\u30fc\u30f3\u3067\u3001\u69cb\u6587\u306fDB\u3054\u3068\u306b\u7570\u306a\u308b<\/li>\n
    • PostgreSQL\u306eON CONFLICT\u306funique conflict\u51e6\u7406\u306b\u5411\u304f<\/li>\n
    • MERGE\u306fsource\u3068target\u3092\u7167\u5408\u3057\u305f\u8907\u6570\u5206\u5c90\u306b\u5411\u304f<\/li>\n
    • MySQL\u3067\u306fON DUPLICATE KEY UPDATE\u304c\u4ee3\u8868\u7684<\/li>\n
    • MERGE\u3068UPSERT\u7cfb\u69cb\u6587\u3092\u540c\u4e00\u8996\u305b\u305a\u3001\u5224\u5b9a\u6761\u4ef6\u304b\u3089\u9078\u3076<\/li>\n<\/ul>\n
      \u307e\u305a\u5bfe\u8c61\u51e6\u7406\u304c\u300c\u4e00\u610f\u30ad\u30fc\u7af6\u5408\u306e\u51e6\u7406\u300d\u306a\u306e\u304b\u300csource\u3068target\u306e\u540c\u671f\u300d\u306a\u306e\u304b\u3092\u66f8\u304d\u51fa\u3057\u3001\u305d\u306e\u5f8c\u3067\u5229\u7528DB\u306e\u73fe\u884c\u69cb\u6587\u3092\u9078\u3093\u3067\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"featured_media":6401,"template":"","meta":{"ssp_meta_title":"SQL MERGE\u3068UPSERT\u306e\u9055\u3044\uff5cPostgreSQL\u30fbMySQL\u3067\u6bd4\u8f03","ssp_meta_description":"SQL\u306eMERGE\u3068UPSERT\u306e\u9055\u3044\u3092\u3001PostgreSQL 18\u3068MySQL 8.4\u306e\u73fe\u884c\u69cb\u6587\u3067\u89e3\u8aac\u3002ON CONFLICT\u3001ON DUPLICATE KEY UPDATE\u3001MERGE\u306e\u4f7f\u3044\u5206\u3051\u3068\u6ce8\u610f\u70b9\u3092\u6574\u7406\u3057\u307e\u3059\u3002","ssp_meta_keyword":"SQL MERGE UPSERT,MERGE UPSERT \u9055\u3044,PostgreSQL ON CONFLICT,MySQL ON DUPLICATE KEY UPDATE,SQL MERGE,UPSERT,SQL INSERT UPDATE","ssp_meta_canonical":""},"route_category":[9],"_links":{"self":[{"href":"https:\/\/route-zero.com\/recruit\/wp-json\/wp\/v2\/route\/6399"}],"collection":[{"href":"https:\/\/route-zero.com\/recruit\/wp-json\/wp\/v2\/route"}],"about":[{"href":"https:\/\/route-zero.com\/recruit\/wp-json\/wp\/v2\/types\/route"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/route-zero.com\/recruit\/wp-json\/wp\/v2\/media\/6401"}],"wp:attachment":[{"href":"https:\/\/route-zero.com\/recruit\/wp-json\/wp\/v2\/media?parent=6399"}],"wp:term":[{"taxonomy":"route_category","embeddable":true,"href":"https:\/\/route-zero.com\/recruit\/wp-json\/wp\/v2\/route_category?post=6399"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}