{"id":192094,"date":"2024-11-12T17:54:21","date_gmt":"2024-11-12T09:54:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/192094\/"},"modified":"2024-11-12T17:54:22","modified_gmt":"2024-11-12T09:54:22","slug":"%e8%a9%b3%e8%ab%87%e6%8d%95%e7%8d%b2oracle-sql%e8%aa%9e%e5%8f%a5%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/192094\/","title":{"rendered":"\u8a73\u8ac7\u6355\u7372Oracle SQL\u8a9e\u53e5\u57f7\u884c\u8a08\u5283"},"content":{"rendered":"<h1 id=\"%e8%a9%b3%e8%ab%87%e6%8d%95%e7%8d%b2oracle-sql%e8%aa%9e%e5%8f%a5%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83-quTunYApsH\">\u8a73\u8ac7\u6355\u7372Oracle SQL\u8a9e\u53e5\u57f7\u884c\u8a08\u5283<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6027\u80fd\u512a\u5316\u662f\u78ba\u4fdd\u61c9\u7528\u7a0b\u5e8f\u9ad8\u6548\u904b\u884c\u7684\u95dc\u9375\u56e0\u7d20\u4e4b\u4e00\u3002Oracle\u6578\u64da\u5eab\u63d0\u4f9b\u4e86\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\u4f86\u5206\u6790SQL\u8a9e\u53e5\u7684\u57f7\u884c\u8a08\u5283\uff0c\u9019\u5c0d\u65bc\u8b58\u5225\u6027\u80fd\u74f6\u9838\u548c\u512a\u5316\u67e5\u8a62\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u6355\u7372Oracle SQL\u8a9e\u53e5\u7684\u57f7\u884c\u8a08\u5283\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6280\u5de7\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83%ef%bc%9f-quTunYApsH\">\u4ec0\u9ebc\u662f\u57f7\u884c\u8a08\u5283\uff1f<\/h2>\n<p>\u57f7\u884c\u8a08\u5283\u662fOracle\u6578\u64da\u5eab\u7528\u4f86\u57f7\u884cSQL\u8a9e\u53e5\u7684\u6b65\u9a5f\u548c\u7b56\u7565\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\u901a\u904e\u5206\u6790\u57f7\u884c\u8a08\u5283\uff0c\u958b\u767c\u4eba\u54e1\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u53ef\u4ee5\u4e86\u89e3\u67e5\u8a62\u7684\u6027\u80fd\uff0c\u4e26\u627e\u51fa\u6f5b\u5728\u7684\u512a\u5316\u6a5f\u6703\u3002<\/p>\n<h2 id=\"%e6%8d%95%e7%8d%b2%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83%e7%9a%84%e6%96%b9%e6%b3%95-quTunYApsH\">\u6355\u7372\u57f7\u884c\u8a08\u5283\u7684\u65b9\u6cd5<\/h2>\n<p>Oracle\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u6355\u7372SQL\u8a9e\u53e5\u7684\u57f7\u884c\u8a08\u5283\uff0c\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8explain-plan-quTunYApsH\">1. \u4f7f\u7528EXPLAIN PLAN<\/h3>\n<p>EXPLAIN PLAN\u8a9e\u53e5\u53ef\u4ee5\u751f\u6210SQL\u8a9e\u53e5\u7684\u57f7\u884c\u8a08\u5283\uff0c\u800c\u4e0d\u5be6\u969b\u57f7\u884c\u8a72\u8a9e\u53e5\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528EXPLAIN PLAN\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>EXPLAIN PLAN FOR\nSELECT * FROM employees WHERE department_id = 10;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u8a9e\u53e5\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u67e5\u770b\u751f\u6210\u7684\u57f7\u884c\u8a08\u5283\uff1a<\/p>\n<pre><code>SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY);<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8autotrace-quTunYApsH\">2. \u4f7f\u7528AUTOTRACE<\/h3>\n<p>AUTOTRACE\u662f\u4e00\u500b\u65b9\u4fbf\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5728SQL*Plus\u4e2d\u555f\u7528\uff0c\u5141\u8a31\u7528\u6236\u5728\u57f7\u884c\u67e5\u8a62\u6642\u81ea\u52d5\u986f\u793a\u57f7\u884c\u8a08\u5283\u548c\u7d71\u8a08\u4fe1\u606f\u3002\u555f\u7528AUTOTRACE\u7684\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n<pre><code>SET AUTOTRACE ON;<\/code><\/pre>\n<p>\u7136\u5f8c\u57f7\u884cSQL\u67e5\u8a62\uff0c\u7cfb\u7d71\u5c07\u986f\u793a\u57f7\u884c\u8a08\u5283\u548c\u57f7\u884c\u7d71\u8a08\u4fe1\u606f\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8sql-trace%e5%92%8ctkprof-quTunYApsH\">3. \u4f7f\u7528SQL Trace\u548cTKPROF<\/h3>\n<p>SQL Trace\u662f\u4e00\u7a2e\u66f4\u9ad8\u7d1a\u7684\u6027\u80fd\u5206\u6790\u5de5\u5177\uff0c\u53ef\u4ee5\u6355\u7372SQL\u8a9e\u53e5\u7684\u57f7\u884c\u4fe1\u606f\u3002\u555f\u7528SQL Trace\u7684\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER SESSION SET SQL_TRACE = TRUE;<\/code><\/pre>\n<p>\u57f7\u884c\u5b8c\u67e5\u8a62\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528TKPROF\u5de5\u5177\u4f86\u683c\u5f0f\u5316\u548c\u5206\u6790\u751f\u6210\u7684\u8ddf\u8e64\u6587\u4ef6\uff0c\u5f9e\u800c\u7372\u5f97\u8a73\u7d30\u7684\u57f7\u884c\u8a08\u5283\u548c\u6027\u80fd\u6578\u64da\u3002<\/p>\n<h2 id=\"%e5%88%86%e6%9e%90%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83-quTunYApsH\">\u5206\u6790\u57f7\u884c\u8a08\u5283<\/h2>\n<p>\u6355\u7372\u57f7\u884c\u8a08\u5283\u5f8c\uff0c\u63a5\u4e0b\u4f86\u7684\u6b65\u9a5f\u662f\u5206\u6790\u5b83\u3002\u57f7\u884c\u8a08\u5283\u4e2d\u5305\u542b\u7684\u95dc\u9375\u4fe1\u606f\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u64cd\u4f5c\u985e\u578b\uff1a<\/strong>\u986f\u793a\u6578\u64da\u8a2a\u554f\u7684\u65b9\u5f0f\uff0c\u4f8b\u5982\u5168\u8868\u6383\u63cf\u3001\u7d22\u5f15\u6383\u63cf\u7b49\u3002<\/li>\n<li><strong>\u6210\u672c\uff1a<\/strong>\u6bcf\u500b\u64cd\u4f5c\u7684\u9810\u4f30\u6210\u672c\uff0c\u901a\u5e38\u7528\u65bc\u6bd4\u8f03\u4e0d\u540c\u67e5\u8a62\u7684\u6027\u80fd\u3002<\/li>\n<li><strong>\u884c\u6578\uff1a<\/strong>\u9810\u4f30\u6bcf\u500b\u64cd\u4f5c\u5c07\u8655\u7406\u7684\u884c\u6578\u3002<\/li>\n<li><strong>\u9023\u63a5\u985e\u578b\uff1a<\/strong>\u986f\u793a\u4e0d\u540c\u8868\u4e4b\u9593\u7684\u9023\u63a5\u65b9\u5f0f\uff0c\u4f8b\u5982\u5d4c\u5957\u5faa\u74b0\u3001\u54c8\u5e0c\u9023\u63a5\u7b49\u3002<\/li>\n<\/ul>\n<p>\u901a\u904e\u5206\u6790\u9019\u4e9b\u4fe1\u606f\uff0c\u958b\u767c\u4eba\u54e1\u53ef\u4ee5\u8b58\u5225\u51fa\u6027\u80fd\u74f6\u9838\uff0c\u4e26\u91dd\u5c0d\u6027\u5730\u9032\u884c\u512a\u5316\uff0c\u4f8b\u5982\u6dfb\u52a0\u7d22\u5f15\u3001\u91cd\u5beb\u67e5\u8a62\u6216\u8abf\u6574\u6578\u64da\u5eab\u7d50\u69cb\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-quTunYApsH\">\u7d50\u8ad6<\/h2>\n<p>\u6355\u7372\u548c\u5206\u6790Oracle SQL\u8a9e\u53e5\u7684\u57f7\u884c\u8a08\u5283\u662f\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u7684\u91cd\u8981\u6b65\u9a5f\u3002\u901a\u904e\u4f7f\u7528EXPLAIN PLAN\u3001AUTOTRACE\u548cSQL Trace\u7b49\u5de5\u5177\uff0c\u958b\u767c\u4eba\u54e1\u53ef\u4ee5\u6df1\u5165\u4e86\u89e3\u67e5\u8a62\u7684\u57f7\u884c\u904e\u7a0b\uff0c\u4e26\u91dd\u5c0d\u6027\u5730\u9032\u884c\u512a\u5316\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u9084\u80fd\u6539\u5584\u6574\u9ad4\u7cfb\u7d71\u7684\u97ff\u61c9\u901f\u5ea6\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0eOracle SQL\u8a9e\u53e5\u57f7\u884c\u8a08\u5283\u7684\u6355\u7372\u6280\u8853\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u80fd\u8207\u6578\u64da\u5eab\u7ba1\u7406\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-192094","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/192094","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=192094"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/192094\/revisions"}],"predecessor-version":[{"id":192095,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/192094\/revisions\/192095"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=192094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=192094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=192094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}