{"id":60329,"date":"2024-10-13T01:57:17","date_gmt":"2024-10-12T17:57:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60329\/"},"modified":"2024-10-13T01:57:18","modified_gmt":"2024-10-12T17:57:18","slug":"db2-sql%e6%96%87%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83%e7%9b%a3%e6%8e%a7%e7%b0%a1%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60329\/","title":{"rendered":"DB2 SQL\u6587\u57f7\u884c\u8a08\u5283\u76e3\u63a7\u7c21\u4ecb"},"content":{"rendered":"<h1 id=\"db2-sql%e6%96%87%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83%e7%9b%a3%e6%8e%a7%e7%b0%a1%e4%bb%8b-DhemTiNvqF\">DB2 SQL\u6587\u57f7\u884c\u8a08\u5283\u76e3\u63a7\u7c21\u4ecb<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cSQL\u57f7\u884c\u8a08\u5283\u662f\u512a\u5316\u67e5\u8a62\u6027\u80fd\u7684\u95dc\u9375\u56e0\u7d20\u4e4b\u4e00\u3002IBM\u7684DB2\u6578\u64da\u5eab\u7cfb\u7d71\u63d0\u4f9b\u4e86\u591a\u7a2e\u5de5\u5177\u548c\u65b9\u6cd5\u4f86\u76e3\u63a7\u548c\u5206\u6790SQL\u57f7\u884c\u8a08\u5283\uff0c\u4ee5\u5e6b\u52a9\u6578\u64da\u5eab\u7ba1\u7406\u54e1\uff08DBA\uff09\u8b58\u5225\u6027\u80fd\u74f6\u9838\u4e26\u9032\u884c\u8abf\u512a\u3002\u672c\u6587\u5c07\u4ecb\u7d39DB2 SQL\u6587\u57f7\u884c\u8a08\u5283\u7684\u57fa\u672c\u6982\u5ff5\u3001\u76e3\u63a7\u65b9\u6cd5\u53ca\u5176\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afsql%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83%ef%bc%9f-DhemTiNvqF\">\u4ec0\u9ebc\u662fSQL\u57f7\u884c\u8a08\u5283\uff1f<\/h2>\n<p>SQL\u57f7\u884c\u8a08\u5283\u662f\u6578\u64da\u5eab\u7cfb\u7d71\u5728\u57f7\u884cSQL\u67e5\u8a62\u6642\u6240\u9078\u64c7\u7684\u64cd\u4f5c\u6b65\u9a5f\u7684\u8a73\u7d30\u63cf\u8ff0\u3002\u5b83\u986f\u793a\u4e86\u6578\u64da\u5eab\u5982\u4f55\u8a2a\u554f\u6578\u64da\uff0c\u5305\u62ec\u4f7f\u7528\u7684\u7d22\u5f15\u3001\u9023\u63a5\u985e\u578b\u3001\u6392\u5e8f\u548c\u904e\u6ffe\u7b49\u64cd\u4f5c\u3002\u57f7\u884c\u8a08\u5283\u7684\u6548\u7387\u76f4\u63a5\u5f71\u97ff\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u548c\u8cc7\u6e90\u6d88\u8017\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e7%9b%a3%e6%8e%a7sql%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83%ef%bc%9f-DhemTiNvqF\">\u70ba\u4ec0\u9ebc\u9700\u8981\u76e3\u63a7SQL\u57f7\u884c\u8a08\u5283\uff1f<\/h2>\n<p>\u76e3\u63a7SQL\u57f7\u884c\u8a08\u5283\u7684\u4e3b\u8981\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u6027\u80fd\u512a\u5316\uff1a<\/strong>\u900f\u904e\u5206\u6790\u57f7\u884c\u8a08\u5283\uff0cDBA\u53ef\u4ee5\u8b58\u5225\u51fa\u6027\u80fd\u74f6\u9838\uff0c\u4e26\u91dd\u5c0d\u6027\u5730\u9032\u884c\u512a\u5316\u3002<\/li>\n<li><strong>\u8cc7\u6e90\u7ba1\u7406\uff1a<\/strong>\u4e86\u89e3\u67e5\u8a62\u7684\u8cc7\u6e90\u9700\u6c42\u6709\u52a9\u65bc\u66f4\u6709\u6548\u5730\u5206\u914d\u7cfb\u7d71\u8cc7\u6e90\uff0c\u907f\u514d\u904e\u5ea6\u4f7f\u7528\u3002<\/li>\n<li><strong>\u6545\u969c\u6392\u9664\uff1a<\/strong>\u7576\u67e5\u8a62\u6027\u80fd\u4e0b\u964d\u6642\uff0c\u57f7\u884c\u8a08\u5283\u53ef\u4ee5\u5e6b\u52a9DBA\u5feb\u901f\u5b9a\u4f4d\u554f\u984c\u6240\u5728\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e7%9b%a3%e6%8e%a7db2-sql%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83-DhemTiNvqF\">\u5982\u4f55\u76e3\u63a7DB2 SQL\u57f7\u884c\u8a08\u5283<\/h2>\n<p>DB2\u63d0\u4f9b\u4e86\u591a\u7a2e\u5de5\u5177\u548c\u547d\u4ee4\u4f86\u76e3\u63a7SQL\u57f7\u884c\u8a08\u5283\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8explain%e5%91%bd%e4%bb%a4-DhemTiNvqF\">1. \u4f7f\u7528EXPLAIN\u547d\u4ee4<\/h3>\n<p>EXPLAIN\u547d\u4ee4\u53ef\u4ee5\u751f\u6210SQL\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u3002\u4f7f\u7528\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>EXPLAIN PLAN FOR \nSELECT * FROM employees WHERE department_id = 10;<\/code><\/pre>\n<p>\u57f7\u884c\u5f8c\uff0cDB2\u6703\u5c07\u57f7\u884c\u8a08\u5283\u5b58\u5132\u5728EXPLAIN\u8868\u4e2d\uff0cDBA\u53ef\u4ee5\u67e5\u8a62\u9019\u4e9b\u8868\u4f86\u7372\u53d6\u8a73\u7d30\u7684\u57f7\u884c\u8a08\u5283\u4fe1\u606f\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8db2%e7%9a%84%e7%9b%a3%e6%8e%a7%e8%a6%96%e5%9c%96-DhemTiNvqF\">2. \u4f7f\u7528DB2\u7684\u76e3\u63a7\u8996\u5716<\/h3>\n<p>DB2\u63d0\u4f9b\u4e86\u4e00\u4e9b\u7cfb\u7d71\u8996\u5716\u4f86\u76e3\u63a7SQL\u57f7\u884c\u7684\u6027\u80fd\u3002\u4f8b\u5982\uff0c<code>MON_GET_UNIT_OF_WORK<\/code>\u8996\u5716\u53ef\u4ee5\u63d0\u4f9b\u6709\u95dc\u55ae\u4f4d\u5de5\u4f5c\uff08UOW\uff09\u7684\u8a73\u7d30\u4fe1\u606f\uff0c\u5305\u62ec\u57f7\u884c\u6642\u9593\u548c\u8cc7\u6e90\u4f7f\u7528\u60c5\u6cc1\u3002<\/p>\n<pre><code>SELECT * FROM TABLE(MON_GET_UNIT_OF_WORK(NULL)) AS t;<\/code><\/pre>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8db2-performance-expert-DhemTiNvqF\">3. \u4f7f\u7528DB2 Performance Expert<\/h3>\n<p>DB2 Performance Expert\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9DBA\u5206\u6790\u548c\u512a\u5316SQL\u67e5\u8a62\u7684\u6027\u80fd\u3002\u5b83\u63d0\u4f9b\u4e86\u5716\u5f62\u5316\u754c\u9762\uff0c\u65b9\u4fbf\u7528\u6236\u67e5\u770b\u57f7\u884c\u8a08\u5283\u548c\u6027\u80fd\u6307\u6a19\u3002<\/p>\n<h2 id=\"%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83%e7%9a%84%e5%88%86%e6%9e%90-DhemTiNvqF\">\u57f7\u884c\u8a08\u5283\u7684\u5206\u6790<\/h2>\n<p>\u5728\u7372\u53d6\u57f7\u884c\u8a08\u5283\u5f8c\uff0cDBA\u9700\u8981\u5c0d\u5176\u9032\u884c\u5206\u6790\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u5206\u6790\u6307\u6a19\uff1a<\/p>\n<ul>\n<li><strong>\u6210\u672c\uff1a<\/strong>\u57f7\u884c\u8a08\u5283\u7684\u9810\u4f30\u6210\u672c\u53ef\u4ee5\u5e6b\u52a9DBA\u8a55\u4f30\u67e5\u8a62\u7684\u6548\u7387\u3002<\/li>\n<li><strong>\u8a2a\u554f\u65b9\u6cd5\uff1a<\/strong>\u4e86\u89e3\u6578\u64da\u662f\u5982\u4f55\u88ab\u8a2a\u554f\u7684\uff08\u5982\u5168\u8868\u6383\u63cf\u6216\u7d22\u5f15\u6383\u63cf\uff09\u53ef\u4ee5\u5e6b\u52a9\u512a\u5316\u67e5\u8a62\u3002<\/li>\n<li><strong>\u9023\u63a5\u985e\u578b\uff1a<\/strong>\u4e0d\u540c\u7684\u9023\u63a5\u985e\u578b\uff08\u5982\u5d4c\u5957\u5faa\u74b0\u3001\u54c8\u5e0c\u9023\u63a5\uff09\u5c0d\u6027\u80fd\u6709\u4e0d\u540c\u7684\u5f71\u97ff\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-DhemTiNvqF\">\u7d50\u8ad6<\/h2>\n<p>\u76e3\u63a7DB2 SQL\u6587\u57f7\u884c\u8a08\u5283\u662f\u78ba\u4fdd\u6578\u64da\u5eab\u6027\u80fd\u7684\u95dc\u9375\u6b65\u9a5f\u3002\u900f\u904e\u4f7f\u7528EXPLAIN\u547d\u4ee4\u3001\u76e3\u63a7\u8996\u5716\u548c\u5c08\u696d\u5de5\u5177\uff0cDBA\u53ef\u4ee5\u6709\u6548\u5730\u8b58\u5225\u548c\u89e3\u6c7a\u6027\u80fd\u554f\u984c\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\u548c\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u6301\u7e8c\u7684\u57f7\u884c\u8a08\u5283\u76e3\u63a7\u5c07\u6210\u70ba\u6578\u64da\u5eab\u7ba1\u7406\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u53ca\u5176\u4ed6<code>\u4f3a\u670d\u5668<\/code>\u89e3\u6c7a\u65b9\u6848\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DB2 SQL\u6587\u57f7\u884c\u8a08\u5283\u76e3\u63a7\u7c21\u4ecb\uff1a\u4e86\u89e3\u5982\u4f55\u6709\u6548\u76e3\u63a7\u548c\u512a\u5316DB2 SQL\u57f7\u884c\u8a08\u5283\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u548c\u67e5\u8a62\u6548\u7387\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-60329","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60329","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=60329"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60329\/revisions"}],"predecessor-version":[{"id":60330,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60329\/revisions\/60330"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60329"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60329"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60329"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}