{"id":60907,"date":"2024-10-13T06:49:17","date_gmt":"2024-10-12T22:49:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60907\/"},"modified":"2024-10-13T06:49:17","modified_gmt":"2024-10-12T22:49:17","slug":"db2%e7%b4%a2%e5%bc%95%e5%84%aa%e5%8c%96%e7%9a%84%e7%ad%96%e7%95%a5%e9%81%b8%e6%93%87","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60907\/","title":{"rendered":"DB2\u7d22\u5f15\u512a\u5316\u7684\u7b56\u7565\u9078\u64c7"},"content":{"rendered":"<h1 id=\"db2%e7%b4%a2%e5%bc%95%e5%84%aa%e5%8c%96%e7%9a%84%e7%ad%96%e7%95%a5%e9%81%b8%e6%93%87-fhtJvWawLG\">DB2\u7d22\u5f15\u512a\u5316\u7684\u7b56\u7565\u9078\u64c7<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d22\u5f15\u7684\u4f5c\u7528\u81f3\u95dc\u91cd\u8981\u3002\u5c0d\u65bcIBM\u7684DB2\u6578\u64da\u5eab\u4f86\u8aaa\uff0c\u7d22\u5f15\u4e0d\u50c5\u80fd\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u9084\u80fd\u5f71\u97ff\u6574\u9ad4\u7cfb\u7d71\u7684\u6548\u7387\u3002\u672c\u6587\u5c07\u63a2\u8a0eDB2\u7d22\u5f15\u512a\u5316\u7684\u7b56\u7565\u9078\u64c7\uff0c\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u548c\u512a\u5316\u7d22\u5f15\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afdb2%e7%b4%a2%e5%bc%95%ef%bc%9f-fhtJvWawLG\">\u4ec0\u9ebc\u662fDB2\u7d22\u5f15\uff1f<\/h2>\n<p>DB2\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u7528\u65bc\u52a0\u901f\u6578\u64da\u6aa2\u7d22\u3002\u5b83\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u80fd\u5920\u5e6b\u52a9\u6578\u64da\u5eab\u5feb\u901f\u5b9a\u4f4d\u6240\u9700\u7684\u6578\u64da\u3002DB2\u652f\u6301\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u5305\u62ecB\u6a39\u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u548c\u5168\u6587\u7d22\u5f15\u7b49\u3002<\/p>\n<h2 id=\"%e7%b4%a2%e5%bc%95%e5%84%aa%e5%8c%96%e7%9a%84%e9%87%8d%e8%a6%81%e6%80%a7-fhtJvWawLG\">\u7d22\u5f15\u512a\u5316\u7684\u91cd\u8981\u6027<\/h2>\n<p>\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u67e5\u8a62\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\u3002\u512a\u5316\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\uff0c\u6e1b\u5c11I\/O\u64cd\u4f5c\uff0c\u5f9e\u800c\u63d0\u5347\u6574\u9ad4\u7cfb\u7d71\u6027\u80fd\u3002\u6839\u64daIBM\u7684\u7814\u7a76\uff0c\u9069\u7576\u7684\u7d22\u5f15\u7b56\u7565\u53ef\u4ee5\u5c07\u67e5\u8a62\u6642\u9593\u7e2e\u77ed\u9ad8\u905490%\u3002<\/p>\n<h2 id=\"db2%e7%b4%a2%e5%bc%95%e5%84%aa%e5%8c%96%e7%9a%84%e7%ad%96%e7%95%a5-fhtJvWawLG\">DB2\u7d22\u5f15\u512a\u5316\u7684\u7b56\u7565<\/h2>\n<h3 id=\"1-%e9%81%b8%e6%93%87%e5%90%88%e9%81%a9%e7%9a%84%e7%b4%a2%e5%bc%95%e9%a1%9e%e5%9e%8b-fhtJvWawLG\">1. \u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b<\/h3>\n<p>\u6839\u64da\u67e5\u8a62\u7684\u7279\u6027\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u662f\u512a\u5316\u7684\u7b2c\u4e00\u6b65\u3002\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><strong>B\u6a39\u7d22\u5f15\uff1a<\/strong>\u9069\u5408\u7bc4\u570d\u67e5\u8a62\u548c\u6392\u5e8f\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u54c8\u5e0c\u7d22\u5f15\uff1a<\/strong>\u9069\u5408\u7cbe\u78ba\u67e5\u8a62\uff0c\u4f46\u4e0d\u652f\u6301\u7bc4\u570d\u67e5\u8a62\u3002<\/li>\n<li><strong>\u5168\u6587\u7d22\u5f15\uff1a<\/strong>\u9069\u5408\u5c0d\u6587\u672c\u6578\u64da\u9032\u884c\u641c\u7d22\u3002<\/li>\n<\/ul>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e8%a4%87%e5%90%88%e7%b4%a2%e5%bc%95-fhtJvWawLG\">2. \u4f7f\u7528\u8907\u5408\u7d22\u5f15<\/h3>\n<p>\u8907\u5408\u7d22\u5f15\u662f\u7531\u591a\u500b\u5217\u7d44\u6210\u7684\u7d22\u5f15\uff0c\u80fd\u5920\u63d0\u9ad8\u591a\u689d\u4ef6\u67e5\u8a62\u7684\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u67e5\u8a62\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM orders WHERE customer_id = ? AND order_date = ?;<\/code><\/pre>\n<p>\u53ef\u4ee5\u5275\u5efa\u4e00\u500b\u8907\u5408\u7d22\u5f15\uff1a<\/p>\n<pre><code>CREATE INDEX idx_customer_order ON orders (customer_id, order_date);<\/code><\/pre>\n<h3 id=\"3-%e5%ae%9a%e6%9c%9f%e9%87%8d%e5%bb%ba%e5%92%8c%e9%87%8d%e7%b5%84%e7%b4%a2%e5%bc%95-fhtJvWawLG\">3. \u5b9a\u671f\u91cd\u5efa\u548c\u91cd\u7d44\u7d22\u5f15<\/h3>\n<p>\u96a8\u8457\u6578\u64da\u7684\u589e\u9577\u548c\u8b8a\u66f4\uff0c\u7d22\u5f15\u53ef\u80fd\u6703\u8b8a\u5f97\u4e0d\u5920\u9ad8\u6548\u3002\u5b9a\u671f\u91cd\u5efa\u548c\u91cd\u7d44\u7d22\u5f15\u53ef\u4ee5\u6d88\u9664\u788e\u7247\uff0c\u63d0\u5347\u67e5\u8a62\u6027\u80fd\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u91cd\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>REBUILD INDEX idx_customer_order;<\/code><\/pre>\n<h3 id=\"4-%e7%9b%a3%e6%8e%a7%e5%92%8c%e5%88%86%e6%9e%90%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd-fhtJvWawLG\">4. \u76e3\u63a7\u548c\u5206\u6790\u67e5\u8a62\u6027\u80fd<\/h3>\n<p>\u4f7f\u7528DB2\u7684\u6027\u80fd\u76e3\u63a7\u5de5\u5177\uff0c\u5b9a\u671f\u5206\u6790\u67e5\u8a62\u6027\u80fd\uff0c\u627e\u51fa\u6162\u67e5\u8a62\u548c\u672a\u4f7f\u7528\u7684\u7d22\u5f15\u3002\u6839\u64da\u5206\u6790\u7d50\u679c\u8abf\u6574\u7d22\u5f15\u7b56\u7565\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u6aa2\u67e5\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u6cc1\uff1a<\/p>\n<pre><code>SELECT * FROM syscat.indexes WHERE tabname = 'orders';<\/code><\/pre>\n<h3 id=\"5-%e8%80%83%e6%85%ae%e7%b4%a2%e5%bc%95%e7%9a%84%e7%b6%ad%e8%ad%b7%e6%88%90%e6%9c%ac-fhtJvWawLG\">5. \u8003\u616e\u7d22\u5f15\u7684\u7dad\u8b77\u6210\u672c<\/h3>\n<p>\u96d6\u7136\u7d22\u5f15\u80fd\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u4f46\u4e5f\u6703\u589e\u52a0\u6578\u64da\u5beb\u5165\u7684\u6210\u672c\u3002\u6bcf\u7576\u6578\u64da\u88ab\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u6642\uff0c\u76f8\u95dc\u7684\u7d22\u5f15\u4e5f\u9700\u8981\u9032\u884c\u66f4\u65b0\u3002\u56e0\u6b64\uff0c\u5728\u5275\u5efa\u7d22\u5f15\u6642\uff0c\u61c9\u8003\u616e\u5230\u5176\u7dad\u8b77\u6210\u672c\uff0c\u907f\u514d\u904e\u591a\u7684\u7d22\u5f15\u5f71\u97ff\u6578\u64da\u5beb\u5165\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-fhtJvWawLG\">\u7d50\u8ad6<\/h2>\n<p>DB2\u7d22\u5f15\u512a\u5316\u662f\u4e00\u500b\u6301\u7e8c\u7684\u904e\u7a0b\uff0c\u9700\u8981\u6839\u64da\u5be6\u969b\u7684\u67e5\u8a62\u9700\u6c42\u548c\u6578\u64da\u8b8a\u5316\u9032\u884c\u8abf\u6574\u3002\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u3001\u4f7f\u7528\u8907\u5408\u7d22\u5f15\u3001\u5b9a\u671f\u91cd\u5efa\u548c\u91cd\u7d44\u7d22\u5f15\u3001\u76e3\u63a7\u67e5\u8a62\u6027\u80fd\u4ee5\u53ca\u8003\u616e\u7dad\u8b77\u6210\u672c\uff0c\u90fd\u662f\u6709\u6548\u7684\u512a\u5316\u7b56\u7565\u3002\u901a\u904e\u9019\u4e9b\u7b56\u7565\u7684\u5be6\u65bd\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u5347DB2\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0c\u78ba\u4fdd\u7cfb\u7d71\u7684\u9ad8\u6548\u904b\u884c\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<em><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/em>\u548c<em><a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a><\/em>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u7d22\u5f15\u512a\u5316\u7b56\u7565\uff0c\u63d0\u5347\u67e5\u8a62\u6027\u80fd\uff0c\u6e1b\u5c11\u8cc7\u6e90\u6d88\u8017\uff0c\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u8207\u5b58\u53d6\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-60907","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60907","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=60907"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60907\/revisions"}],"predecessor-version":[{"id":60908,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60907\/revisions\/60908"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60907"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60907"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60907"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}