{"id":199840,"date":"2025-05-06T08:17:32","date_gmt":"2025-05-06T00:17:32","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199840\/"},"modified":"2025-05-06T08:17:32","modified_gmt":"2025-05-06T00:17:32","slug":"%e9%87%8d%e5%a4%8d%e7%b4%a2%e5%bc%95%e5%9c%a8oracle%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%ad%e7%9a%84%e5%bd%b1%e5%93%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199840\/","title":{"rendered":"\u91cd\u590d\u7d22\u5f15\u5728Oracle\u6570\u636e\u5e93\u4e2d\u7684\u5f71\u54cd"},"content":{"rendered":"

<\/b> <\/p>\n

\u91cd\u590d\u7d22\u5f15\u5728Oracle\u6570\u636e\u5e93\u4e2d\u7684\u5f71\u54cd<\/h1>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u6253\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\u5427\uff01\u6587\u4e2d\u5185\u5bb9\u5305\u542b\u7b49\u7b49\u77e5\u8bc6\u70b9…\u5e0c\u671b\u4f60\u80fd\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u771f\u771f\u5b9e\u5b9e\u5b66\u5230\u77e5\u8bc6\u6216\u8005\u5e2e\u4f60\u89e3\u51b3\u5fc3\u4e2d\u7684\u7591\u60d1\uff0c\u4e5f\u6b22\u8fce\u5927\u4f6c\u6216\u8005\u65b0\u4eba\u670b\u53cb\u4eec\u591a\u7559\u8a00\u8bc4\u8bba\uff0c\u591a\u7ed9\u5efa\u8bae\uff01\u8c22\u8c22\uff01<\/p>\n

\u6807\u9898\uff1aOracle\u6570\u636e\u5e93\u4e2d\u91cd\u590d\u7d22\u5f15\u5bf9\u6027\u80fd\u7684\u5f71\u54cd\u53ca\u4f18\u5316\u65b9\u6cd5<\/p>\n

\u5728Oracle\u6570\u636e\u5e93\u4e2d\uff0c\u7d22\u5f15\u662f\u7528\u4e8e\u52a0\u5feb\u6570\u636e\u68c0\u7d22\u901f\u5ea6\u7684\u91cd\u8981\u5de5\u5177\u3002\u7136\u800c\uff0c\u5f53\u6570\u636e\u5e93\u4e2d\u5b58\u5728\u91cd\u590d\u7684\u7d22\u5f15\u65f6\uff0c\u4f1a\u5bf9\u6027\u80fd\u9020\u6210\u8d1f\u9762\u5f71\u54cd\u3002\u672c\u6587\u5c06\u63a2\u8ba8\u91cd\u590d\u7d22\u5f15\u5bf9\u6027\u80fd\u7684\u5f71\u54cd\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u548c\u4f18\u5316\u65b9\u6cd5\u3002<\/p>\n

1. \u91cd\u590d\u7d22\u5f15\u5bf9\u6027\u80fd\u7684\u5f71\u54cd<\/h3>\n

\u91cd\u590d\u7d22\u5f15\u662f\u6307\u5728\u6570\u636e\u5e93\u8868\u4e2d\u5b58\u5728\u4e24\u4e2a\u6216\u591a\u4e2a\u5177\u6709\u76f8\u540c\u5217\u7ec4\u5408\u7684\u7d22\u5f15\u3002\u8fd9\u79cd\u60c5\u51b5\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4ee5\u4e0b\u95ee\u9898\uff1a<\/p>\n

1.1 \u4e0d\u5fc5\u8981\u7684\u7d22\u5f15\u7ef4\u62a4<\/h4>\n

\u5f53\u6570\u636e\u5e93\u5f15\u64ce\u6267\u884c\u5199\u64cd\u4f5c\uff08\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u5220\u9664\uff09\u65f6\uff0c\u6bcf\u4e2a\u7d22\u5f15\u90fd\u9700\u8981\u8fdb\u884c\u7ef4\u62a4\u3002\u5982\u679c\u591a\u4e2a\u7d22\u5f15\u5305\u542b\u76f8\u540c\u7684\u5217\u7ec4\u5408\uff0c\u90a3\u4e48\u8fd9\u4e9b\u7d22\u5f15\u5728\u7ef4\u62a4\u65f6\u4f1a\u589e\u52a0\u989d\u5916\u7684\u5f00\u9500\uff0c\u5f71\u54cd\u6570\u636e\u5e93\u7684\u6027\u80fd\u3002<\/p>\n

1.2 \u67e5\u8be2\u4f18\u5316\u56f0\u96be<\/h4>\n

\u91cd\u590d\u7d22\u5f15\u53ef\u80fd\u5bfc\u81f4\u6570\u636e\u5e93\u4f18\u5316\u5668\u5728\u6267\u884c\u67e5\u8be2\u65f6\u9009\u62e9\u9519\u8bef\u7684\u7d22\u5f15\uff0c\u4ece\u800c\u65e0\u6cd5\u5145\u5206\u5229\u7528\u7d22\u5f15\u7684\u4f18\u52bf\uff0c\u964d\u4f4e\u67e5\u8be2\u6548\u7387\u3002<\/p>\n

2. \u5177\u4f53\u4ee3\u7801\u793a\u4f8b<\/h3>\n

\u5047\u8bbe\u6709\u4e00\u4e2a\u540d\u4e3a”employee”\u7684\u5458\u5de5\u8868\uff0c\u5305\u542b\u5458\u5de5\u7684\u59d3\u540d\u3001\u5de5\u53f7\u548c\u90e8\u95e8\u4fe1\u606f\u3002\u73b0\u5728\u5206\u522b\u5728”employee”\u8868\u7684”\u59d3\u540d”\u548c”\u5de5\u53f7”\u5217\u4e0a\u521b\u5efa\u4e86\u91cd\u590d\u7684\u7d22\u5f15\uff0c\u5177\u4f53\u7684SQL\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

CREATE INDEX idx_name ON employee(name);\nCREATE INDEX idx_empno ON employee(empno);\nCREATE INDEX idx_name_dup ON employee(name);<\/pre>\n
3. \u4f18\u5316\u65b9\u6cd5<\/h3>\n
\u4e3a\u4e86\u89e3\u51b3\u91cd\u590d\u7d22\u5f15\u5bf9\u6027\u80fd\u7684\u5f71\u54cd\uff0c\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u4f18\u5316\u65b9\u6cd5\uff1a<\/p>\n
3.1 \u5b9a\u671f\u68c0\u67e5\u7d22\u5f15<\/h4>\n
\u5b9a\u671f\u68c0\u67e5\u6570\u636e\u5e93\u4e2d\u7684\u7d22\u5f15\u60c5\u51b5\uff0c\u907f\u514d\u521b\u5efa\u91cd\u590d\u7684\u7d22\u5f15\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0bSQL\u8bed\u53e5\u67e5\u8be2\u6570\u636e\u5e93\u4e2d\u5b58\u5728\u7684\u91cd\u590d\u7d22\u5f15\uff1a<\/p>\n
SELECT index_name, table_name, column_name\nFROM dba_ind_columns\nGROUP BY index_name, table_name, column_name\nHAVING COUNT(*) > 1;<\/pre>\n
3.2 \u79fb\u9664\u91cd\u590d\u7d22\u5f15<\/h4>\n
\u4e00\u65e6\u53d1\u73b0\u91cd\u590d\u7d22\u5f15\uff0c\u5e94\u8be5\u53ca\u65f6\u8fdb\u884c\u79fb\u9664\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8bed\u53e5\u5220\u9664\u91cd\u590d\u7684\u7d22\u5f15\uff1a<\/p>\n
DROP INDEX idx_name_dup;<\/pre>\n
3.3 \u5408\u5e76\u7d22\u5f15<\/h4>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u8003\u8651\u5c06\u591a\u4e2a\u7d22\u5f15\u5408\u5e76\u6210\u4e00\u4e2a\u66f4\u7ec6\u7c92\u5ea6\u7684\u7d22\u5f15\uff0c\u4ee5\u51cf\u5c11\u7d22\u5f15\u6570\u91cf\u5e76\u63d0\u9ad8\u7d22\u5f15\u6548\u7387\u3002<\/p>\n
\u7ed3\u8bba<\/h3>\n
\u91cd\u590d\u7d22\u5f15\u5728Oracle\u6570\u636e\u5e93\u4e2d\u4f1a\u5bf9\u6027\u80fd\u4ea7\u751f\u8d1f\u9762\u5f71\u54cd\uff0c\u56e0\u6b64\u9700\u8981\u53ca\u65f6\u68c0\u6d4b\u548c\u4f18\u5316\u3002\u901a\u8fc7\u5b9a\u671f\u68c0\u67e5\u3001\u79fb\u9664\u548c\u5408\u5e76\u91cd\u590d\u7d22\u5f15\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u5e93\u7684\u6027\u80fd\u5e76\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u5f00\u9500\u3002\u5e0c\u671b\u672c\u6587\u63d0\u4f9b\u7684\u4fe1\u606f\u548c\u793a\u4f8b\u80fd\u591f\u5e2e\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u6570\u636e\u5e93\u7d22\u5f15\uff0c\u63d0\u5347\u7cfb\u7edf\u6548\u7387\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u300a\u91cd\u590d\u7d22\u5f15\u5728Oracle\u6570\u636e\u5e93\u4e2d\u7684\u5f71\u54cd\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8eOracle,\u6027\u80fd,\u7d22\u5f15\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff01<\/p>\n
\n
\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u91cd\u590d\u7d22\u5f15\u5728Oracle\u6570\u636e\u5e93\u4e2d\u7684...<\/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-199840","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199840","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=199840"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199840\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199840"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199840"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199840"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}