{"id":96066,"date":"2024-10-20T06:19:15","date_gmt":"2024-10-19T22:19:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96066\/"},"modified":"2024-10-20T06:19:16","modified_gmt":"2024-10-19T22:19:16","slug":"oracle%e7%b4%a2%e5%bc%95%e7%9a%84%e5%af%a6%e9%9a%9b%e6%93%8d%e4%bd%9c%e6%ad%a5%e9%a9%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96066\/","title":{"rendered":"Oracle\u7d22\u5f15\u7684\u5be6\u969b\u64cd\u4f5c\u6b65\u9a5f"},"content":{"rendered":"<h1 id=\"oracle%e7%b4%a2%e5%bc%95%e7%9a%84%e5%af%a6%e9%9a%9b%e6%93%8d%e4%bd%9c%e6%ad%a5%e9%a9%9f-MiwLmeCWdq\">Oracle\u7d22\u5f15\u7684\u5be6\u969b\u64cd\u4f5c\u6b65\u9a5f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u500b\u81f3\u95dc\u91cd\u8981\u7684\u6982\u5ff5\u3002\u5b83\u80fd\u5920\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002Oracle\u6578\u64da\u5eab\u63d0\u4f9b\u4e86\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728Oracle\u4e2d\u5275\u5efa\u548c\u7ba1\u7406\u7d22\u5f15\u7684\u5be6\u969b\u64cd\u4f5c\u6b65\u9a5f\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%b4%a2%e5%bc%95%ef%bc%9f-MiwLmeCWdq\">\u4ec0\u9ebc\u662f\u7d22\u5f15\uff1f<\/h2>\n<p>\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u65e8\u5728\u52a0\u901f\u6578\u64da\u6aa2\u7d22\u64cd\u4f5c\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\u3002Oracle\u652f\u6301\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u5305\u62ecB\u6a39\u7d22\u5f15\u3001\u4f4d\u5716\u7d22\u5f15\u3001\u53cd\u5411\u9375\u7d22\u5f15\u7b49\u3002<\/p>\n<h2 id=\"%e5%89%b5%e5%bb%ba%e7%b4%a2%e5%bc%95%e7%9a%84%e6%ad%a5%e9%a9%9f-MiwLmeCWdq\">\u5275\u5efa\u7d22\u5f15\u7684\u6b65\u9a5f<\/h2>\n<h3 id=\"1-%e7%a2%ba%e5%ae%9a%e7%b4%a2%e5%bc%95%e7%9a%84%e9%9c%80%e6%b1%82-MiwLmeCWdq\">1. \u78ba\u5b9a\u7d22\u5f15\u7684\u9700\u6c42<\/h3>\n<p>\u5728\u5275\u5efa\u7d22\u5f15\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5206\u6790\u67e5\u8a62\u7684\u6027\u80fd\u74f6\u9838\u3002\u901a\u5e38\uff0c\u5c0d\u65bc\u7d93\u5e38\u7528\u65bc\u67e5\u8a62\u7684\u5217\uff0c\u7279\u5225\u662f\u90a3\u4e9b\u5728WHERE\u5b50\u53e5\u4e2d\u51fa\u73fe\u7684\u5217\uff0c\u5275\u5efa\u7d22\u5f15\u662f\u6709\u76ca\u7684\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8create-index%e8%aa%9e%e5%8f%a5-MiwLmeCWdq\">2. \u4f7f\u7528CREATE INDEX\u8a9e\u53e5<\/h3>\n<p>\u5728Oracle\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528CREATE INDEX\u8a9e\u53e5\u4f86\u5275\u5efa\u7d22\u5f15\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u57fa\u672c\u7684\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>CREATE INDEX index_name\nON table_name (column1, column2, ...);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70baEMPLOYEES\u7684\u8868\uff0c\u4e26\u5e0c\u671b\u5728LAST_NAME\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE INDEX idx_last_name\nON EMPLOYEES (LAST_NAME);<\/code><\/pre>\n<h3 id=\"3-%e7%a2%ba%e8%aa%8d%e7%b4%a2%e5%bc%95%e7%9a%84%e5%89%b5%e5%bb%ba-MiwLmeCWdq\">3. \u78ba\u8a8d\u7d22\u5f15\u7684\u5275\u5efa<\/h3>\n<p>\u5275\u5efa\u7d22\u5f15\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u78ba\u8a8d\u7d22\u5f15\u662f\u5426\u6210\u529f\u5275\u5efa\uff1a<\/p>\n<pre><code>SELECT INDEX_NAME, TABLE_NAME\nFROM USER_INDEXES\nWHERE TABLE_NAME = 'EMPLOYEES';<\/code><\/pre>\n<h2 id=\"%e7%ae%a1%e7%90%86%e7%b4%a2%e5%bc%95-MiwLmeCWdq\">\u7ba1\u7406\u7d22\u5f15<\/h2>\n<h3 id=\"1-%e6%9f%a5%e7%9c%8b%e7%b4%a2%e5%bc%95%e4%bf%a1%e6%81%af-MiwLmeCWdq\">1. \u67e5\u770b\u7d22\u5f15\u4fe1\u606f<\/h3>\n<p>\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u67e5\u770b\u7279\u5b9a\u7d22\u5f15\u7684\u8a73\u7d30\u4fe1\u606f\uff1a<\/p>\n<pre><code>SELECT * \nFROM USER_IND_COLUMNS \nWHERE INDEX_NAME = 'idx_last_name';<\/code><\/pre>\n<h3 id=\"2-%e5%88%aa%e9%99%a4%e7%b4%a2%e5%bc%95-MiwLmeCWdq\">2. \u522a\u9664\u7d22\u5f15<\/h3>\n<p>\u5982\u679c\u767c\u73fe\u67d0\u500b\u7d22\u5f15\u4e0d\u518d\u9700\u8981\uff0c\u6216\u8005\u5f71\u97ff\u4e86\u6578\u64da\u7684\u63d2\u5165\u548c\u66f4\u65b0\u6027\u80fd\uff0c\u53ef\u4ee5\u4f7f\u7528DROP INDEX\u8a9e\u53e5\u522a\u9664\u7d22\u5f15\uff1a<\/p>\n<pre><code>DROP INDEX idx_last_name;<\/code><\/pre>\n<h3 id=\"3-%e9%87%8d%e5%bb%ba%e7%b4%a2%e5%bc%95-MiwLmeCWdq\">3. \u91cd\u5efa\u7d22\u5f15<\/h3>\n<p>\u96a8\u8457\u6578\u64da\u7684\u589e\u9577\uff0c\u7d22\u5f15\u53ef\u80fd\u6703\u8b8a\u5f97\u4e0d\u5920\u9ad8\u6548\u3002\u53ef\u4ee5\u4f7f\u7528ALTER INDEX\u8a9e\u53e5\u4f86\u91cd\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>ALTER INDEX idx_last_name REBUILD;<\/code><\/pre>\n<h2 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-MiwLmeCWdq\">\u7d22\u5f15\u7684\u6700\u4f73\u5be6\u8e10<\/h2>\n<ul>\n<li>\u907f\u514d\u5728\u7d93\u5e38\u66f4\u65b0\u7684\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u56e0\u70ba\u9019\u6703\u5f71\u97ff\u6027\u80fd\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u91cd\u5efa\u7d22\u5f15\uff0c\u4ee5\u4fdd\u6301\u5176\u6548\u7387\u3002<\/li>\n<li>\u6839\u64da\u67e5\u8a62\u6a21\u5f0f\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-MiwLmeCWdq\">\u7e3d\u7d50<\/h2>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u7d22\u5f15\u7684\u5275\u5efa\u548c\u7ba1\u7406\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u91cd\u8981\u624b\u6bb5\u3002\u901a\u904e\u5408\u7406\u7684\u7d22\u5f15\u8a2d\u8a08\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u7684\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6027\u80fd\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684<a href=\"https:\/\/server.hk\">VPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u904b\u884cOracle\u6578\u64da\u5eab\u4e5f\u662f\u4e00\u500b\u660e\u667a\u7684\u9078\u64c7\u3002\u4e86\u89e3\u7d22\u5f15\u7684\u64cd\u4f5c\u6b65\u9a5f\u548c\u6700\u4f73\u5be6\u8e10\uff0c\u5c07\u6709\u52a9\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Oracle\u7d22\u5f15\u7684\u5be6\u969b\u64cd\u4f5c\u6b65\u9a5f\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\uff0c\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\uff0c\u7c21\u5316\u7ba1\u7406\u6d41\u7a0b\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-96066","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96066","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=96066"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96066\/revisions"}],"predecessor-version":[{"id":96067,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96066\/revisions\/96067"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96066"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}