{"id":60373,"date":"2024-10-13T02:19:14","date_gmt":"2024-10-12T18:19:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60373\/"},"modified":"2024-10-13T02:19:14","modified_gmt":"2024-10-12T18:19:14","slug":"db2-%e5%84%aa%e5%8c%96%e5%99%a8%e4%b8%ad%e6%ad%a3%e7%a2%ba%e4%bd%bf%e7%94%a8%e5%88%86%e4%bd%88%e7%b5%b1%e8%a8%88%e4%bf%a1%e6%81%af%e5%a6%82%e4%bd%95%e6%93%8d%e4%bd%9c%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60373\/","title":{"rendered":"DB2 \u512a\u5316\u5668\u4e2d\u6b63\u78ba\u4f7f\u7528\u5206\u4f48\u7d71\u8a08\u4fe1\u606f\u5982\u4f55\u64cd\u4f5c\uff1f"},"content":{"rendered":"<h1 id=\"db2-%e5%84%aa%e5%8c%96%e5%99%a8%e4%b8%ad%e6%ad%a3%e7%a2%ba%e4%bd%bf%e7%94%a8%e5%88%86%e4%bd%88%e7%b5%b1%e8%a8%88%e4%bf%a1%e6%81%af%e5%a6%82%e4%bd%95%e6%93%8d%e4%bd%9c%ef%bc%9f-zGGhheAmNb\">DB2 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id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%88%86%e4%bd%88%e7%b5%b1%e8%a8%88%e4%bf%a1%e6%81%af%ef%bc%9f-zGGhheAmNb\">\u4ec0\u9ebc\u662f\u5206\u4f48\u7d71\u8a08\u4fe1\u606f\uff1f<\/h2>\n<p>\u5206\u4f48\u7d71\u8a08\u4fe1\u606f\u662f\u63cf\u8ff0\u6578\u64da\u8868\u4e2d\u6578\u64da\u5206\u4f48\u60c5\u6cc1\u7684\u6578\u64da\u3002\u9019\u4e9b\u4fe1\u606f\u5305\u62ec\u5217\u7684\u6700\u5c0f\u503c\u3001\u6700\u5927\u503c\u3001\u5e73\u5747\u503c\u3001\u552f\u4e00\u503c\u7684\u6578\u91cf\u4ee5\u53ca\u6578\u64da\u7684\u5206\u4f48\u6a21\u5f0f\u7b49\u3002DB2 \u4f7f\u7528\u9019\u4e9b\u7d71\u8a08\u4fe1\u606f\u4f86\u4f30\u7b97\u67e5\u8a62\u7684\u6210\u672c\uff0c\u5f9e\u800c\u9078\u64c7\u6700\u512a\u7684\u57f7\u884c\u8a08\u5283\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e5%88%86%e4%bd%88%e7%b5%b1%e8%a8%88%e4%bf%a1%e6%81%af%e9%87%8d%e8%a6%81%ef%bc%9f-zGGhheAmNb\">\u70ba\u4ec0\u9ebc\u5206\u4f48\u7d71\u8a08\u4fe1\u606f\u91cd\u8981\uff1f<\/h2>\n<p>\u6b63\u78ba\u7684\u5206\u4f48\u7d71\u8a08\u4fe1\u606f\u80fd\u5920\u5e6b\u52a9\u512a\u5316\u5668\u505a\u51fa\u66f4\u6e96\u78ba\u7684\u6c7a\u7b56\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u82e5\u7d71\u8a08\u4fe1\u606f\u4e0d\u6e96\u78ba\uff0c\u512a\u5316\u5668\u53ef\u80fd\u6703\u9078\u64c7\u4e0d\u5408\u9069\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5c0e\u81f4\u67e5\u8a62\u57f7\u884c\u6548\u7387\u4f4e\u4e0b\uff0c\u751a\u81f3\u51fa\u73fe\u6027\u80fd\u74f6\u9838\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e6%94%b6%e9%9b%86%e5%92%8c%e6%9b%b4%e6%96%b0%e5%88%86%e4%bd%88%e7%b5%b1%e8%a8%88%e4%bf%a1%e6%81%af%ef%bc%9f-zGGhheAmNb\">\u5982\u4f55\u6536\u96c6\u548c\u66f4\u65b0\u5206\u4f48\u7d71\u8a08\u4fe1\u606f\uff1f<\/h2>\n<p>\u5728 DB2 \u4e2d\uff0c\u6536\u96c6\u548c\u66f4\u65b0\u5206\u4f48\u7d71\u8a08\u4fe1\u606f\u7684\u904e\u7a0b\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\u9032\u884c\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528 RUNSTATS \u547d\u4ee4\uff1a<\/strong>\u9019\u662f\u6536\u96c6\u7d71\u8a08\u4fe1\u606f\u7684\u4e3b\u8981\u65b9\u6cd5\u3002\u53ef\u4ee5\u91dd\u5c0d\u6574\u500b\u8868\u6216\u7279\u5b9a\u7684\u5217\u9032\u884c\u7d71\u8a08\u4fe1\u606f\u7684\u6536\u96c6\u3002<\/li>\n<li><strong>\u9078\u64c7\u5408\u9069\u7684\u9078\u9805\uff1a<\/strong>\u5728\u57f7\u884c RUNSTATS \u6642\uff0c\u53ef\u4ee5\u9078\u64c7\u4e0d\u540c\u7684\u9078\u9805\u4f86\u6536\u96c6\u6240\u9700\u7684\u7d71\u8a08\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u4f7f\u7528 <code>ALL<\/code> \u9078\u9805\u53ef\u4ee5\u6536\u96c6\u6240\u6709\u5217\u7684\u7d71\u8a08\u4fe1\u606f\uff0c\u800c\u4f7f\u7528 <code>COLUMNS<\/code> \u9078\u9805\u5247\u53ef\u4ee5\u91dd\u5c0d\u7279\u5b9a\u5217\u9032\u884c\u6536\u96c6\u3002<\/li>\n<li><strong>\u5b9a\u671f\u66f4\u65b0\uff1a<\/strong>\u96a8\u8457\u6578\u64da\u7684\u8b8a\u5316\uff0c\u61c9\u5b9a\u671f\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff0c\u4ee5\u78ba\u4fdd\u512a\u5316\u5668\u80fd\u5920\u57fa\u65bc\u6700\u65b0\u7684\u6578\u64da\u505a\u51fa\u6c7a\u7b56\u3002<\/li>\n<\/ul>\n<h3 id=\"runstats-%e5%91%bd%e4%bb%a4%e7%a4%ba%e4%be%8b-zGGhheAmNb\">RUNSTATS \u547d\u4ee4\u793a\u4f8b<\/h3>\n<pre><code>RUNSTATS ON TABLE my_table WITH DISTRIBUTION AND DETAILED INDEXES ALL;<\/code><\/pre>\n<p>\u4e0a\u8ff0\u547d\u4ee4\u5c07\u5c0d <code>my_table<\/code> \u8868\u9032\u884c\u7d71\u8a08\u4fe1\u606f\u7684\u6536\u96c6\uff0c\u5305\u62ec\u5206\u4f48\u7d71\u8a08\u548c\u8a73\u7d30\u7684\u7d22\u5f15\u7d71\u8a08\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e6%aa%a2%e6%9f%a5%e5%92%8c%e9%a9%97%e8%ad%89%e7%b5%b1%e8%a8%88%e4%bf%a1%e6%81%af%ef%bc%9f-zGGhheAmNb\">\u5982\u4f55\u6aa2\u67e5\u548c\u9a57\u8b49\u7d71\u8a08\u4fe1\u606f\uff1f<\/h2>\n<p>\u5728\u6536\u96c6\u7d71\u8a08\u4fe1\u606f\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u6aa2\u67e5\u548c\u9a57\u8b49\u7d71\u8a08\u4fe1\u606f\u7684\u6e96\u78ba\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528 LIST TABLES \u547d\u4ee4\uff1a<\/strong>\u9019\u53ef\u4ee5\u986f\u793a\u8868\u7684\u7d71\u8a08\u4fe1\u606f\uff0c\u5305\u62ec\u884c\u6578\u548c\u5217\u7684\u7d71\u8a08\u4fe1\u606f\u3002<\/li>\n<li><strong>\u4f7f\u7528 EXPLAIN \u547d\u4ee4\uff1a<\/strong>\u901a\u904e EXPLAIN \u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u512a\u5316\u5668\u9078\u64c7\u7684\u57f7\u884c\u8a08\u5283\uff0c\u4e26\u6aa2\u67e5\u5176\u662f\u5426\u57fa\u65bc\u6700\u65b0\u7684\u7d71\u8a08\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<h3 id=\"explain-%e5%91%bd%e4%bb%a4%e7%a4%ba%e4%be%8b-zGGhheAmNb\">EXPLAIN \u547d\u4ee4\u793a\u4f8b<\/h3>\n<pre><code>EXPLAIN PLAN FOR SELECT * FROM my_table WHERE column1 = 'value';<\/code><\/pre>\n<p>\u9019\u5c07\u986f\u793a\u91dd\u5c0d\u7279\u5b9a\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5e6b\u52a9\u7528\u6236\u4e86\u89e3\u512a\u5316\u5668\u7684\u6c7a\u7b56\u904e\u7a0b\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-zGGhheAmNb\">\u7d50\u8ad6<\/h2>\n<p>\u5728 DB2 \u4e2d\uff0c\u6b63\u78ba\u4f7f\u7528\u5206\u4f48\u7d71\u8a08\u4fe1\u606f\u5c0d\u65bc\u512a\u5316\u67e5\u8a62\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u5b9a\u671f\u6536\u96c6\u548c\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff0c\u4e26\u6aa2\u67e5\u5176\u6e96\u78ba\u6027\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u53ef\u4ee5\u78ba\u4fdd\u512a\u5316\u5668\u80fd\u5920\u505a\u51fa\u6700\u4f73\u7684\u67e5\u8a62\u57f7\u884c\u6c7a\u7b56\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u9084\u80fd\u6e1b\u5c11\u7cfb\u7d71\u8cc7\u6e90\u7684\u6d6a\u8cbb\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728DB2\u512a\u5316\u5668\u4e2d\u6b63\u78ba\u4f7f\u7528\u5206\u4f48\u7d71\u8a08\u4fe1\u606f\uff0c\u4ee5\u63d0\u5347\u67e5\u8a62\u6027\u80fd\u548c\u6578\u64da\u5eab\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-60373","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60373","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=60373"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60373\/revisions"}],"predecessor-version":[{"id":60374,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60373\/revisions\/60374"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60373"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60373"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60373"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}