{"id":93840,"date":"2024-10-19T17:21:17","date_gmt":"2024-10-19T09:21:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/93840\/"},"modified":"2024-10-19T17:21:17","modified_gmt":"2024-10-19T09:21:17","slug":"oracle-9i%e5%85%a8%e7%b4%a2%e5%bc%95%e6%8e%83%e6%8f%8f%e5%92%8c%e5%87%bd%e6%95%b8%e7%b4%a2%e5%bc%95%e4%b8%80%e8%b5%b7%e5%b7%a5%e4%bd%9c%e7%9a%84%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/93840\/","title":{"rendered":"Oracle 9i\u5168\u7d22\u5f15\u6383\u63cf\u548c\u51fd\u6578\u7d22\u5f15\u4e00\u8d77\u5de5\u4f5c\u7684\u539f\u7406"},"content":{"rendered":"<h1 id=\"oracle-9i%e5%85%a8%e7%b4%a2%e5%bc%95%e6%8e%83%e6%8f%8f%e5%92%8c%e5%87%bd%e6%95%b8%e7%b4%a2%e5%bc%95%e4%b8%80%e8%b5%b7%e5%b7%a5%e4%bd%9c%e7%9a%84%e5%8e%9f%e7%90%86-FpvOaGObUt\">Oracle 9i\u5168\u7d22\u5f15\u6383\u63cf\u548c\u51fd\u6578\u7d22\u5f15\u4e00\u8d77\u5de5\u4f5c\u7684\u539f\u7406<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d22\u5f15\u7684\u4f7f\u7528\u5c0d\u65bc\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002Oracle 9i\u4f5c\u70ba\u4e00\u6b3e\u6210\u719f\u7684\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u5176\u4e2d\u5168\u7d22\u5f15\u6383\u63cf\u548c\u51fd\u6578\u7d22\u5f15\u7684\u7d50\u5408\u4f7f\u7528\uff0c\u80fd\u5920\u986f\u8457\u63d0\u5347\u67e5\u8a62\u6548\u7387\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u5169\u8005\u7684\u5de5\u4f5c\u539f\u7406\u53ca\u5176\u76f8\u4e92\u4f5c\u7528\u3002<\/p>\n<h2 id=\"%e5%85%a8%e7%b4%a2%e5%bc%95%e6%8e%83%e6%8f%8f%e7%9a%84%e6%a6%82%e5%bf%b5-FpvOaGObUt\">\u5168\u7d22\u5f15\u6383\u63cf\u7684\u6982\u5ff5<\/h2>\n<p>\u5168\u7d22\u5f15\u6383\u63cf\uff08Full Index Scan\uff09\u662f\u6307\u5728\u67e5\u8a62\u904e\u7a0b\u4e2d\uff0c\u6578\u64da\u5eab\u7cfb\u7d71\u6703\u904d\u6b77\u6574\u500b\u7d22\u5f15\u7d50\u69cb\uff0c\u4ee5\u5c0b\u627e\u7b26\u5408\u689d\u4ef6\u7684\u6578\u64da\u884c\u3002\u9019\u7a2e\u65b9\u6cd5\u901a\u5e38\u5728\u4ee5\u4e0b\u60c5\u6cc1\u4e0b\u4f7f\u7528\uff1a<\/p>\n<ul>\n<li>\u67e5\u8a62\u689d\u4ef6\u6d89\u53ca\u5230\u7d22\u5f15\u7684\u6240\u6709\u5217\u3002<\/li>\n<li>\u67e5\u8a62\u7d50\u679c\u96c6\u8f03\u5c0f\uff0c\u80fd\u5920\u6709\u6548\u5229\u7528\u7d22\u5f15\u3002<\/li>\n<li>\u7d22\u5f15\u7684\u9078\u64c7\u6027\u8f03\u9ad8\uff0c\u80fd\u5920\u5feb\u901f\u5b9a\u4f4d\u6240\u9700\u6578\u64da\u3002<\/li>\n<\/ul>\n<p>\u5168\u7d22\u5f15\u6383\u63cf\u7684\u512a\u52e2\u5728\u65bc\uff0c\u5b83\u80fd\u5920\u6e1b\u5c11\u5c0d\u6578\u64da\u8868\u7684\u76f4\u63a5\u8a2a\u554f\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u7136\u800c\uff0c\u7576\u6578\u64da\u91cf\u9f90\u5927\u6642\uff0c\u9019\u7a2e\u65b9\u6cd5\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002<\/p>\n<h2 id=\"%e5%87%bd%e6%95%b8%e7%b4%a2%e5%bc%95%e7%9a%84%e6%a6%82%e5%bf%b5-FpvOaGObUt\">\u51fd\u6578\u7d22\u5f15\u7684\u6982\u5ff5<\/h2>\n<p>\u51fd\u6578\u7d22\u5f15\uff08Function-Based Index\uff09\u662fOracle 9i\u7684\u4e00\u9805\u91cd\u8981\u7279\u6027\uff0c\u5141\u8a31\u7528\u6236\u5728\u7d22\u5f15\u4e2d\u5b58\u5132\u8a08\u7b97\u7d50\u679c\u3002\u9019\u610f\u5473\u8457\u7528\u6236\u53ef\u4ee5\u5c0d\u67d0\u4e9b\u5217\u61c9\u7528\u51fd\u6578\uff0c\u4e26\u5c07\u7d50\u679c\u4f5c\u70ba\u7d22\u5f15\u7684\u4e00\u90e8\u5206\u3002\u9019\u5c0d\u65bc\u9700\u8981\u9032\u884c\u8a08\u7b97\u6216\u8f49\u63db\u7684\u67e5\u8a62\u7279\u5225\u6709\u7528\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u5305\u542b\u65e5\u671f\u7684\u5217\uff0c\u4e26\u4e14\u7d93\u5e38\u9700\u8981\u67e5\u8a62\u8a72\u5217\u7684\u5e74\u4efd\u3002\u7528\u6236\u53ef\u4ee5\u5275\u5efa\u4e00\u500b\u51fd\u6578\u7d22\u5f15\uff0c\u5c07\u5e74\u4efd\u4f5c\u70ba\u7d22\u5f15\u7684\u4e00\u90e8\u5206\uff0c\u5f9e\u800c\u52a0\u901f\u67e5\u8a62\uff1a<\/p>\n<pre><code>CREATE INDEX idx_year ON my_table (EXTRACT(YEAR FROM date_column));<\/code><\/pre>\n<h2 id=\"%e5%85%a8%e7%b4%a2%e5%bc%95%e6%8e%83%e6%8f%8f%e8%88%87%e5%87%bd%e6%95%b8%e7%b4%a2%e5%bc%95%e7%9a%84%e7%b5%90%e5%90%88-FpvOaGObUt\">\u5168\u7d22\u5f15\u6383\u63cf\u8207\u51fd\u6578\u7d22\u5f15\u7684\u7d50\u5408<\/h2>\n<p>\u7576\u5168\u7d22\u5f15\u6383\u63cf\u8207\u51fd\u6578\u7d22\u5f15\u7d50\u5408\u4f7f\u7528\u6642\uff0c\u6578\u64da\u5eab\u80fd\u5920\u66f4\u9ad8\u6548\u5730\u8655\u7406\u8907\u96dc\u67e5\u8a62\u3002\u9019\u7a2e\u7d50\u5408\u7684\u5de5\u4f5c\u539f\u7406\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u67e5\u8a62\u4e2d\u6d89\u53ca\u7684\u51fd\u6578\u53ef\u4ee5\u76f4\u63a5\u5229\u7528\u51fd\u6578\u7d22\u5f15\uff0c\u907f\u514d\u4e86\u5c0d\u6574\u500b\u6578\u64da\u8868\u7684\u6383\u63cf\u3002<\/li>\n<li>\u5168\u7d22\u5f15\u6383\u63cf\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u5230\u7b26\u5408\u689d\u4ef6\u7684\u7d22\u5f15\u689d\u76ee\uff0c\u5f9e\u800c\u6e1b\u5c11\u4e86\u9700\u8981\u6aa2\u7d22\u7684\u6578\u64da\u91cf\u3002<\/li>\n<li>\u9019\u7a2e\u65b9\u5f0f\u7279\u5225\u9069\u5408\u65bc\u9700\u8981\u9032\u884c\u8a08\u7b97\u7684\u67e5\u8a62\uff0c\u80fd\u5920\u986f\u8457\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u7528\u6236\u9700\u8981\u67e5\u8a62\u67d0\u500b\u5e74\u4efd\u7684\u6240\u6709\u8a18\u9304\uff0c\u4f7f\u7528\u51fd\u6578\u7d22\u5f15\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u5230\u8a72\u5e74\u4efd\u7684\u6240\u6709\u689d\u76ee\uff0c\u7136\u5f8c\u9032\u884c\u5168\u7d22\u5f15\u6383\u63cf\u4ee5\u7372\u53d6\u5177\u9ad4\u6578\u64da\u3002<\/p>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e6%a1%88%e4%be%8b-FpvOaGObUt\">\u5be6\u969b\u61c9\u7528\u6848\u4f8b<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u8a31\u591a\u4f01\u696d\u5229\u7528Oracle 9i\u7684\u5168\u7d22\u5f15\u6383\u63cf\u548c\u51fd\u6578\u7d22\u5f15\u4f86\u512a\u5316\u5176\u6578\u64da\u67e5\u8a62\u3002\u4f8b\u5982\uff0c\u4e00\u5bb6\u96fb\u5b50\u5546\u52d9\u516c\u53f8\u9700\u8981\u7d93\u5e38\u67e5\u8a62\u7279\u5b9a\u6642\u9593\u7bc4\u570d\u5167\u7684\u8a02\u55ae\u3002\u901a\u904e\u5275\u5efa\u51fd\u6578\u7d22\u5f15\u4f86\u63d0\u53d6\u8a02\u55ae\u65e5\u671f\u7684\u5e74\u4efd\uff0c\u4e26\u7d50\u5408\u5168\u7d22\u5f15\u6383\u63cf\uff0c\u8a72\u516c\u53f8\u80fd\u5920\u5728\u5e7e\u6beb\u79d2\u5167\u7372\u53d6\u6240\u9700\u6578\u64da\uff0c\u986f\u8457\u63d0\u5347\u4e86\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-FpvOaGObUt\">\u7e3d\u7d50<\/h2>\n<p>\u5168\u7d22\u5f15\u6383\u63cf\u548c\u51fd\u6578\u7d22\u5f15\u7684\u7d50\u5408\u4f7f\u7528\uff0c\u70baOracle 9i\u7528\u6236\u63d0\u4f9b\u4e86\u4e00\u7a2e\u9ad8\u6548\u7684\u67e5\u8a62\u89e3\u6c7a\u65b9\u6848\u3002\u901a\u904e\u5408\u7406\u8a2d\u8a08\u7d22\u5f15\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u8005\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u5f9e\u800c\u66f4\u597d\u5730\u6eff\u8db3\u696d\u52d9\u9700\u6c42\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a><\/code>\u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Oracle 9i\u4e2d\u5168\u7d22\u5f15\u6383\u63cf\u8207\u51fd\u6578\u7d22\u5f15\u7684\u5354\u540c\u5de5\u4f5c\u539f\u7406\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\u8207\u6027\u80fd\u512a\u5316\u6280\u5de7\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-93840","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93840","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=93840"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93840\/revisions"}],"predecessor-version":[{"id":93841,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93840\/revisions\/93841"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=93840"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=93840"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=93840"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}