{"id":60583,"date":"2024-10-13T04:04:19","date_gmt":"2024-10-12T20:04:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60583\/"},"modified":"2024-10-13T04:04:20","modified_gmt":"2024-10-12T20:04:20","slug":"db2%e5%bc%b7%e5%88%b6%e5%84%aa%e5%8c%96%e5%99%a8%e7%9a%84%e4%bd%bf%e7%94%a8%e7%ab%85%e9%96%80%e4%b8%8d%e5%be%97%e4%b8%8d%e7%9c%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60583\/","title":{"rendered":"DB2\u5f37\u5236\u512a\u5316\u5668\u7684\u4f7f\u7528\u201c\u7ac5\u9580\u201d\u4e0d\u5f97\u4e0d\u770b"},"content":{"rendered":"<h1 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id=\"%e5%bc%b7%e5%88%b6%e5%84%aa%e5%8c%96%e5%99%a8%e7%9a%84%e4%bd%bf%e7%94%a8%e5%a0%b4%e6%99%af-VoZMOBygFx\">\u5f37\u5236\u512a\u5316\u5668\u7684\u4f7f\u7528\u5834\u666f<\/h2>\n<ul>\n<li><strong>\u6027\u80fd\u74f6\u9838\uff1a<\/strong>\u7576\u67e5\u8a62\u57f7\u884c\u6642\u9593\u904e\u9577\u6642\uff0c\u53ef\u80fd\u9700\u8981\u4f7f\u7528\u5f37\u5236\u512a\u5316\u5668\u4f86\u8abf\u6574\u57f7\u884c\u8a08\u5283\u3002<\/li>\n<li><strong>\u7279\u5b9a\u7d22\u5f15\u7684\u4f7f\u7528\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0cDB2\u53ef\u80fd\u4e0d\u6703\u81ea\u52d5\u9078\u64c7\u6700\u4f73\u7d22\u5f15\uff0c\u9019\u6642\u53ef\u4ee5\u5f37\u5236\u4f7f\u7528\u7279\u5b9a\u7d22\u5f15\u3002<\/li>\n<li><strong>\u8907\u96dc\u67e5\u8a62\uff1a<\/strong>\u5c0d\u65bc\u8907\u96dc\u7684\u67e5\u8a62\uff0c\u5f37\u5236\u512a\u5316\u5668\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u63a7\u5236\u57f7\u884c\u8a08\u5283\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8db2%e5%bc%b7%e5%88%b6%e5%84%aa%e5%8c%96%e5%99%a8-VoZMOBygFx\">\u5982\u4f55\u4f7f\u7528DB2\u5f37\u5236\u512a\u5316\u5668<\/h2>\n<p>\u4f7f\u7528DB2\u5f37\u5236\u512a\u5316\u5668\u7684\u57fa\u672c\u65b9\u6cd5\u662f\u901a\u904e\u67e5\u8a62\u63d0\u793a\uff08Query Hints\uff09\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u63d0\u793a\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>SELECT \/*+ INDEX(table_name index_name) *\/ * \nFROM table_name \nWHERE condition;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u4f7f\u7528\u4e86INDEX\u63d0\u793a\u4f86\u5f37\u5236DB2\u4f7f\u7528\u6307\u5b9a\u7684\u7d22\u5f15\u3002\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u7684\u57f7\u884c\u6548\u7387\u3002<\/p>\n<h3 id=\"%e5%85%b6%e4%bb%96%e6%8f%90%e7%a4%ba%e7%9a%84%e4%bd%bf%e7%94%a8-VoZMOBygFx\">\u5176\u4ed6\u63d0\u793a\u7684\u4f7f\u7528<\/h3>\n<p>\u9664\u4e86INDEX\u63d0\u793a\uff0cDB2\u9084\u652f\u6301\u5176\u4ed6\u591a\u7a2e\u63d0\u793a\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><strong>JOIN\uff1a<\/strong>\u5f37\u5236\u4f7f\u7528\u7279\u5b9a\u7684\u9023\u63a5\u7b97\u6cd5\u3002<\/li>\n<li><strong>ORDER\uff1a<\/strong>\u5f37\u5236\u67e5\u8a62\u7d50\u679c\u7684\u6392\u5e8f\u65b9\u5f0f\u3002<\/li>\n<li><strong>RESULT_SET\uff1a<\/strong>\u6307\u5b9a\u67e5\u8a62\u7684\u7d50\u679c\u96c6\u5927\u5c0f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-VoZMOBygFx\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136\u5f37\u5236\u512a\u5316\u5668\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u4f46\u904e\u5ea6\u4f9d\u8cf4\u53ef\u80fd\u6703\u5c0e\u81f4\u5176\u4ed6\u554f\u984c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6ce8\u610f\u4e8b\u9805\uff1a<\/p>\n<ul>\n<li>\u5728\u4f7f\u7528\u5f37\u5236\u512a\u5316\u5668\u4e4b\u524d\uff0c\u61c9\u5148\u9032\u884c\u6027\u80fd\u6e2c\u8a66\uff0c\u4ee5\u78ba\u4fdd\u5176\u6709\u6548\u6027\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u66f4\u65b0\u67e5\u8a62\u63d0\u793a\uff0c\u4ee5\u9069\u61c9\u6578\u64da\u5eab\u7684\u8b8a\u5316\u3002<\/li>\n<li>\u907f\u514d\u5728\u6240\u6709\u67e5\u8a62\u4e2d\u4f7f\u7528\u5f37\u5236\u512a\u5316\u5668\uff0c\u61c9\u6839\u64da\u5177\u9ad4\u60c5\u6cc1\u9078\u64c7\u6027\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-VoZMOBygFx\">\u7d50\u8ad6<\/h2>\n<p>DB2\u5f37\u5236\u512a\u5316\u5668\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5728\u7279\u5b9a\u60c5\u6cc1\u4e0b\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u67e5\u8a62\u63d0\u793a\uff0c\u7528\u6236\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u6578\u64da\u5eab\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5f9e\u800c\u9054\u5230\u6700\u4f73\u6027\u80fd\u3002\u7136\u800c\uff0c\u4f7f\u7528\u5f37\u5236\u512a\u5316\u5668\u6642\u9700\u8b39\u614e\uff0c\u61c9\u6839\u64da\u5be6\u969b\u60c5\u6cc1\u9032\u884c\u8abf\u6574\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u4e86\u89e3\u548c\u638c\u63e1DB2\u5f37\u5236\u512a\u5316\u5668\u7684\u4f7f\u7528\u7ac5\u9580\u5c07\u662f\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u7684\u95dc\u9375\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u5f37\u5236\u512a\u5316\u5668\u7684\u4f7f\u7528\u7ac5\u9580\uff0c\u63d0\u5347\u67e5\u8a62\u6027\u80fd\uff0c\u512a\u5316\u6578\u64da\u5eab\u7ba1\u7406\uff0c\u8b93\u4f60\u7684\u6578\u64da\u8655\u7406\u66f4\u9ad8\u6548\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-60583","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60583","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=60583"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60583\/revisions"}],"predecessor-version":[{"id":60584,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60583\/revisions\/60584"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60583"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60583"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}