{"id":60313,"date":"2024-10-13T01:49:18","date_gmt":"2024-10-12T17:49:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60313\/"},"modified":"2024-10-13T01:49:19","modified_gmt":"2024-10-12T17:49:19","slug":"db2-merge%e8%aa%9e%e5%8f%a5%e7%9a%84%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60313\/","title":{"rendered":"DB2 Merge\u8a9e\u53e5\u7684\u7528\u6cd5"},"content":{"rendered":"<h1 id=\"db2-merge%e8%aa%9e%e5%8f%a5%e7%9a%84%e7%94%a8%e6%b3%95-dFdjWCvlTX\">DB2 Merge\u8a9e\u53e5\u7684\u7528\u6cd5<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cDB2\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u7cfb\u7d71\uff0c\u7279\u5225\u662f\u5728\u5927\u578b\u4f01\u696d\u74b0\u5883\u4e2d\u3002DB2\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u8655\u7406\u8cc7\u6599\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662fMerge\u8a9e\u53e5\u3002Merge\u8a9e\u53e5\u7684\u4e3b\u8981\u76ee\u7684\u662f\u5c07\u8cc7\u6599\u5f9e\u4e00\u500b\u8868\u5408\u4f75\u5230\u53e6\u4e00\u500b\u8868\uff0c\u6839\u64da\u7279\u5b9a\u7684\u689d\u4ef6\u9032\u884c\u66f4\u65b0\u6216\u63d2\u5165\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eDB2 Merge\u8a9e\u53e5\u7684\u7528\u6cd5\u53ca\u5176\u5be6\u969b\u61c9\u7528\u3002<\/p>\n<h2 id=\"merge%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-dFdjWCvlTX\">Merge\u8a9e\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>Merge\u8a9e\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>\nMERGE INTO target_table AS target\nUSING source_table AS source\nON target.id = source.id\nWHEN MATCHED THEN\n    UPDATE SET target.column1 = source.column1, target.column2 = source.column2\nWHEN NOT MATCHED THEN\n    INSERT (column1, column2) VALUES (source.column1, source.column2);\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u8a9e\u6cd5\u4e2d\uff0c<code>target_table<\/code>\u662f\u76ee\u6a19\u8868\uff0c<code>source_table<\/code>\u662f\u4f86\u6e90\u8868\u3002<code>ON<\/code>\u5b50\u53e5\u7528\u65bc\u6307\u5b9a\u5408\u4f75\u7684\u689d\u4ef6\uff0c<code>WHEN MATCHED<\/code>\u548c<code>WHEN NOT MATCHED<\/code>\u5247\u5206\u5225\u5b9a\u7fa9\u4e86\u7576\u689d\u4ef6\u5339\u914d\u548c\u4e0d\u5339\u914d\u6642\u7684\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"merge%e8%aa%9e%e5%8f%a5%e7%9a%84%e4%bd%bf%e7%94%a8%e6%83%85%e5%a2%83-dFdjWCvlTX\">Merge\u8a9e\u53e5\u7684\u4f7f\u7528\u60c5\u5883<\/h2>\n<p>Merge\u8a9e\u53e5\u901a\u5e38\u7528\u65bc\u4ee5\u4e0b\u5e7e\u7a2e\u60c5\u5883\uff1a<\/p>\n<ul>\n<li><strong>\u8cc7\u6599\u66f4\u65b0\uff1a<\/strong>\u7576\u9700\u8981\u6839\u64da\u4f86\u6e90\u8868\u7684\u8cc7\u6599\u66f4\u65b0\u76ee\u6a19\u8868\u4e2d\u7684\u73fe\u6709\u8a18\u9304\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528Merge\u8a9e\u53e5\u3002<\/li>\n<li><strong>\u8cc7\u6599\u63d2\u5165\uff1a<\/strong>\u7576\u4f86\u6e90\u8868\u4e2d\u6709\u65b0\u7684\u8a18\u9304\uff0c\u800c\u76ee\u6a19\u8868\u4e2d\u4e0d\u5b58\u5728\u9019\u4e9b\u8a18\u9304\u6642\uff0cMerge\u8a9e\u53e5\u53ef\u4ee5\u81ea\u52d5\u5c07\u9019\u4e9b\u65b0\u8a18\u9304\u63d2\u5165\u76ee\u6a19\u8868\u3002<\/li>\n<li><strong>\u8cc7\u6599\u540c\u6b65\uff1a<\/strong>\u5728\u9700\u8981\u5c07\u5169\u500b\u8868\u7684\u8cc7\u6599\u4fdd\u6301\u4e00\u81f4\u6642\uff0cMerge\u8a9e\u53e5\u63d0\u4f9b\u4e86\u4e00\u500b\u7c21\u55ae\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e7%af%84%e4%be%8b-dFdjWCvlTX\">\u5be6\u969b\u7bc4\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<code>employees<\/code>\u548c<code>new_employees<\/code>\u3002<code>employees<\/code>\u8868\u4e2d\u5b58\u5132\u4e86\u73fe\u6709\u54e1\u5de5\u7684\u8cc7\u6599\uff0c\u800c<code>new_employees<\/code>\u8868\u4e2d\u5b58\u5132\u4e86\u65b0\u52a0\u5165\u54e1\u5de5\u7684\u8cc7\u6599\u3002\u6211\u5011\u5e0c\u671b\u5c07<code>new_employees<\/code>\u4e2d\u7684\u8cc7\u6599\u5408\u4f75\u5230<code>employees<\/code>\u4e2d\u3002<\/p>\n<pre><code>\nMERGE INTO employees AS e\nUSING new_employees AS ne\nON e.id = ne.id\nWHEN MATCHED THEN\n    UPDATE SET e.name = ne.name, e.salary = ne.salary\nWHEN NOT MATCHED THEN\n    INSERT (id, name, salary) VALUES (ne.id, ne.name, ne.salary);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u7576<code>new_employees<\/code>\u4e2d\u7684\u54e1\u5de5ID\u8207<code>employees<\/code>\u4e2d\u7684ID\u5339\u914d\u6642\uff0c\u5c07\u66f4\u65b0\u54e1\u5de5\u7684\u59d3\u540d\u548c\u85aa\u6c34\uff1b\u5982\u679cID\u4e0d\u5339\u914d\uff0c\u5247\u5c07\u65b0\u54e1\u5de5\u7684\u8cc7\u6599\u63d2\u5165\u5230<code>employees<\/code>\u8868\u4e2d\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-dFdjWCvlTX\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528Merge\u8a9e\u53e5\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd<code>ON<\/code>\u5b50\u53e5\u4e2d\u7684\u689d\u4ef6\u80fd\u5920\u6b63\u78ba\u8b58\u5225\u5339\u914d\u7684\u8a18\u9304\u3002<\/li>\n<li>\u5728\u9032\u884c\u5927\u898f\u6a21\u8cc7\u6599\u5408\u4f75\u6642\uff0c\u5efa\u8b70\u5148\u5728\u6e2c\u8a66\u74b0\u5883\u4e2d\u9032\u884c\u6e2c\u8a66\uff0c\u4ee5\u907f\u514d\u5c0d\u751f\u7522\u74b0\u5883\u9020\u6210\u5f71\u97ff\u3002<\/li>\n<li>\u8003\u616e\u5230\u8cc7\u6599\u7684\u5b8c\u6574\u6027\uff0c\u61c9\u8a72\u5728\u5408\u4f75\u524d\u6aa2\u67e5\u4f86\u6e90\u8868\u4e2d\u7684\u8cc7\u6599\u662f\u5426\u7b26\u5408\u9810\u671f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-dFdjWCvlTX\">\u7e3d\u7d50<\/h2>\n<p>DB2\u7684Merge\u8a9e\u53e5\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u6709\u6548\u5730\u8655\u7406\u8cc7\u6599\u7684\u66f4\u65b0\u548c\u63d2\u5165\u64cd\u4f5c\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528Merge\u8a9e\u53e5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u7c21\u5316\u8cc7\u6599\u7ba1\u7406\u7684\u6d41\u7a0b\uff0c\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u8cc7\u6599\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u8cc7\u6599\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3DB2 Merge\u8a9e\u53e5\u7684\u7528\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u5408\u4f75\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u7c21\u5316\u6578\u64da\u7ba1\u7406\u6d41\u7a0b\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60313","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60313","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=60313"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60313\/revisions"}],"predecessor-version":[{"id":60314,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60313\/revisions\/60314"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60313"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60313"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60313"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}