{"id":162865,"date":"2024-11-04T18:40:25","date_gmt":"2024-11-04T10:40:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/162865\/"},"modified":"2024-11-04T18:40:26","modified_gmt":"2024-11-04T10:40:26","slug":"%e6%95%99%e4%bd%a0%e6%8f%90%e9%ab%98%e5%95%86%e6%a5%ad%e6%99%ba%e8%83%bd%e7%92%b0%e5%a2%83%e4%b8%ad%e7%9a%84db2%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/162865\/","title":{"rendered":"\u6559\u4f60\u63d0\u9ad8\u5546\u696d\u667a\u80fd\u74b0\u5883\u4e2d\u7684DB2\u67e5\u8a62\u6027\u80fd"},"content":{"rendered":"<h1 id=\"%e6%95%99%e4%bd%a0%e6%8f%90%e9%ab%98%e5%95%86%e6%a5%ad%e6%99%ba%e8%83%bd%e7%92%b0%e5%a2%83%e4%b8%ad%e7%9a%84db2%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd-zSDURNyGGq\">\u6559\u4f60\u63d0\u9ad8\u5546\u696d\u667a\u80fd\u74b0\u5883\u4e2d\u7684DB2\u67e5\u8a62\u6027\u80fd<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u5546\u696d\u74b0\u5883\u4e2d\uff0c\u5546\u696d\u667a\u80fd\uff08BI\uff09\u7cfb\u7d71\u7684\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002IBM\u7684DB2\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u56e0\u5176\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\u800c\u53d7\u5230\u5ee3\u6cdb\u4f7f\u7528\u3002\u7136\u800c\uff0c\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\u548c\u67e5\u8a62\u9700\u6c42\u7684\u589e\u52a0\uff0cDB2\u67e5\u8a62\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u63d0\u9ad8DB2\u67e5\u8a62\u6027\u80fd\u7684\u6709\u6548\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"1-%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5-zSDURNyGGq\">1. \u512a\u5316\u67e5\u8a62\u8a9e\u53e5<\/h2>\n<p>\u67e5\u8a62\u8a9e\u53e5\u7684\u8a2d\u8a08\u5c0d\u6027\u80fd\u6709\u76f4\u63a5\u5f71\u97ff\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u67e5\u8a62\u8a9e\u53e5\u7684\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u7d22\u5f15\uff1a<\/strong>\u78ba\u4fdd\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u5217\u4e0a\u5efa\u7acb\u7d22\u5f15\u3002\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\uff0c\u7279\u5225\u662f\u5728\u5927\u578b\u6578\u64da\u96c6\u4e0a\u3002<\/li>\n<li><strong>\u907f\u514dSELECT *\uff1a<\/strong>\u50c5\u9078\u64c7\u9700\u8981\u7684\u5217\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u91cf\u548c\u8655\u7406\u6642\u9593\u3002<\/li>\n<li><strong>\u4f7f\u7528JOIN\u800c\u975e\u5b50\u67e5\u8a62\uff1a<\/strong>\u5728\u8a31\u591a\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528JOIN\u64cd\u4f5c\u6bd4\u4f7f\u7528\u5b50\u67e5\u8a62\u66f4\u9ad8\u6548\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e8%aa%bf%e6%95%b4%e6%95%b8%e6%93%9a%e5%ba%ab%e9%85%8d%e7%bd%ae-zSDURNyGGq\">2. \u8abf\u6574\u6578\u64da\u5eab\u914d\u7f6e<\/h2>\n<p>DB2\u7684\u914d\u7f6e\u53c3\u6578\u5c0d\u6027\u80fd\u6709\u91cd\u8981\u5f71\u97ff\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5efa\u8b70\u7684\u914d\u7f6e\u8abf\u6574\uff1a<\/p>\n<ul>\n<li><strong>\u589e\u5927\u7de9\u885d\u6c60\u5927\u5c0f\uff1a<\/strong>\u7de9\u885d\u6c60\u662fDB2\u7528\u4f86\u5b58\u5132\u6578\u64da\u9801\u7684\u5167\u5b58\u5340\u57df\u3002\u589e\u5927\u7de9\u885d\u6c60\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u56e0\u70ba\u5b83\u6e1b\u5c11\u4e86\u78c1\u789fI\/O\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u8abf\u6574\u4e26\u884c\u8655\u7406\u8a2d\u7f6e\uff1a<\/strong>\u6839\u64da\u7cfb\u7d71\u7684\u786c\u9ad4\u8cc7\u6e90\uff0c\u8abf\u6574\u4e26\u884c\u8655\u7406\u7684\u53c3\u6578\uff0c\u4ee5\u5145\u5206\u5229\u7528\u591a\u6838\u8655\u7406\u5668\u7684\u512a\u52e2\u3002<\/li>\n<\/ul>\n<h2 id=\"3-%e5%ae%9a%e6%9c%9f%e7%b6%ad%e8%ad%b7%e6%95%b8%e6%93%9a%e5%ba%ab-zSDURNyGGq\">3. \u5b9a\u671f\u7dad\u8b77\u6578\u64da\u5eab<\/h2>\n<p>\u5b9a\u671f\u7684\u6578\u64da\u5eab\u7dad\u8b77\u53ef\u4ee5\u9632\u6b62\u6027\u80fd\u4e0b\u964d\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u7dad\u8b77\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u91cd\u7d44\u7d22\u5f15\uff1a<\/strong>\u96a8\u8457\u6578\u64da\u7684\u589e\u9577\uff0c\u7d22\u5f15\u53ef\u80fd\u6703\u8b8a\u5f97\u4e0d\u518d\u9ad8\u6548\u3002\u5b9a\u671f\u91cd\u7d44\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff1a<\/strong>DB2\u4f7f\u7528\u7d71\u8a08\u4fe1\u606f\u4f86\u751f\u6210\u67e5\u8a62\u57f7\u884c\u8a08\u5283\u3002\u5b9a\u671f\u66f4\u65b0\u9019\u4e9b\u7d71\u8a08\u4fe1\u606f\u53ef\u4ee5\u5e6b\u52a9DB2\u9078\u64c7\u6700\u4f73\u7684\u67e5\u8a62\u8def\u5f91\u3002<\/li>\n<\/ul>\n<h2 id=\"4-%e4%bd%bf%e7%94%a8%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd%e5%88%86%e6%9e%90%e5%b7%a5%e5%85%b7-zSDURNyGGq\">4. \u4f7f\u7528\u67e5\u8a62\u6027\u80fd\u5206\u6790\u5de5\u5177<\/h2>\n<p>DB2\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5de5\u5177\u4f86\u5206\u6790\u67e5\u8a62\u6027\u80fd\uff0c\u4f8b\u5982DB2\u7684EXPLAIN\u529f\u80fd\u3002\u4f7f\u7528\u9019\u4e9b\u5de5\u5177\u53ef\u4ee5\u5e6b\u52a9\u8b58\u5225\u6027\u80fd\u74f6\u9838\uff0c\u4e26\u63d0\u4f9b\u512a\u5316\u5efa\u8b70\u3002<\/p>\n<pre><code>EXPLAIN PLAN FOR\nSELECT * FROM employees\nWHERE department_id = 10;<\/code><\/pre>\n<p>\u901a\u904e\u5206\u6790\u57f7\u884c\u8a08\u5283\uff0c\u53ef\u4ee5\u4e86\u89e3\u67e5\u8a62\u7684\u57f7\u884c\u65b9\u5f0f\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u8abf\u6574\u3002<\/p>\n<h2 id=\"5-%e8%80%83%e6%85%ae%e6%95%b8%e6%93%9a%e5%88%86%e5%8d%80-zSDURNyGGq\">5. 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id=\"%e7%b8%bd%e7%b5%90-zSDURNyGGq\">\u7e3d\u7d50<\/h2>\n<p>\u63d0\u9ad8DB2\u67e5\u8a62\u6027\u80fd\u9700\u8981\u7d9c\u5408\u8003\u616e\u67e5\u8a62\u8a9e\u53e5\u7684\u512a\u5316\u3001\u6578\u64da\u5eab\u914d\u7f6e\u7684\u8abf\u6574\u3001\u5b9a\u671f\u7dad\u8b77\u4ee5\u53ca\u4f7f\u7528\u6027\u80fd\u5206\u6790\u5de5\u5177\u7b49\u591a\u65b9\u9762\u7684\u56e0\u7d20\u3002\u901a\u904e\u9019\u4e9b\u65b9\u6cd5\uff0c\u4f01\u696d\u53ef\u4ee5\u6709\u6548\u63d0\u5347\u5546\u696d\u667a\u80fd\u74b0\u5883\u4e2d\u7684\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u5f9e\u800c\u66f4\u597d\u5730\u652f\u6301\u696d\u52d9\u6c7a\u7b56\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u5546\u696d\u667a\u80fd\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u4ee5\u7372\u5f97\u66f4\u597d\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63d0\u5347DB2\u67e5\u8a62\u6027\u80fd\u7684\u6280\u5de7\u8207\u7b56\u7565\uff0c\u52a9\u4f60\u5728\u5546\u696d\u667a\u80fd\u74b0\u5883\u4e2d\u7372\u5f97\u66f4\u5feb\u7684\u6578\u64da\u8655\u7406\u8207\u5206\u6790\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-162865","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162865","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=162865"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162865\/revisions"}],"predecessor-version":[{"id":162866,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162865\/revisions\/162866"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=162865"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=162865"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=162865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}