{"id":95978,"date":"2024-10-20T05:35:17","date_gmt":"2024-10-19T21:35:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95978\/"},"modified":"2024-10-20T05:35:18","modified_gmt":"2024-10-19T21:35:18","slug":"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e6%9c%80%e5%b8%b8%e7%94%a8%e7%9a%84%e7%b4%a2%e5%bc%95%e6%9c%89%e5%93%aa%e4%ba%9b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95978\/","title":{"rendered":"Oracle\u6578\u64da\u5eab\u4e2d\u7684\u6700\u5e38\u7528\u7684\u7d22\u5f15\u6709\u54ea\u4e9b"},"content":{"rendered":"<h1 id=\"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e6%9c%80%e5%b8%b8%e7%94%a8%e7%9a%84%e7%b4%a2%e5%bc%95%e6%9c%89%e5%93%aa%e4%ba%9b-pDGmryZHea\">Oracle\u6578\u64da\u5eab\u4e2d\u7684\u6700\u5e38\u7528\u7684\u7d22\u5f15\u6709\u54ea\u4e9b<\/h1>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u6578\u64da\u7d50\u69cb\uff0c\u7528\u65bc\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u7d22\u5f15\u7684\u4f7f\u7528\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u6240\u9700\u7684\u6642\u9593\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002\u672c\u6587\u5c07\u63a2\u8a0eOracle\u6578\u64da\u5eab\u4e2d\u6700\u5e38\u7528\u7684\u7d22\u5f15\u985e\u578b\u53ca\u5176\u7279\u9ede\u3002<\/p>\n<h2 id=\"1-b%e6%a8%b9%e7%b4%a2%e5%bc%95%ef%bc%88b-tree-index%ef%bc%89-pDGmryZHea\">1. B\u6a39\u7d22\u5f15\uff08B-Tree Index\uff09<\/h2>\n<p>B\u6a39\u7d22\u5f15\u662fOracle\u4e2d\u6700\u5e38\u7528\u7684\u7d22\u5f15\u985e\u578b\u3002\u5b83\u7684\u7d50\u69cb\u985e\u4f3c\u65bc\u4e00\u68f5\u6a39\uff0c\u80fd\u5920\u6709\u6548\u5730\u652f\u6301\u7bc4\u570d\u67e5\u8a62\u548c\u7b49\u503c\u67e5\u8a62\u3002B\u6a39\u7d22\u5f15\u7684\u512a\u9ede\u5728\u65bc\u5176\u5e73\u8861\u6027\uff0c\u80fd\u5920\u4fdd\u6301\u67e5\u8a62\u6027\u80fd\u7684\u7a69\u5b9a\u6027\u3002<\/p>\n<ul>\n<li><strong>\u7279\u9ede\uff1a<\/strong>\u652f\u6301\u5feb\u901f\u67e5\u8a62\uff0c\u9069\u5408\u65bc\u5927\u591a\u6578\u67e5\u8a62\u5834\u666f\u3002<\/li>\n<li><strong>\u4f7f\u7528\u5834\u666f\uff1a<\/strong>\u9069\u5408\u65bc\u9700\u8981\u983b\u7e41\u67e5\u8a62\u7684\u5217\uff0c\u5982\u4e3b\u9375\u548c\u5916\u9375\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%af%84%e4%be%8b-pDGmryZHea\">\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE INDEX idx_employee_name ON employees(name);<\/code><\/pre>\n<h2 id=\"2-%e4%bd%8d%e5%9c%96%e7%b4%a2%e5%bc%95%ef%bc%88bitmap-index%ef%bc%89-pDGmryZHea\">2. \u4f4d\u5716\u7d22\u5f15\uff08Bitmap Index\uff09<\/h2>\n<p>\u4f4d\u5716\u7d22\u5f15\u4e3b\u8981\u7528\u65bc\u4f4e\u57fa\u6578\u7684\u5217\uff08\u5373\u5217\u4e2d\u4e0d\u540c\u503c\u7684\u6578\u91cf\u8f03\u5c11\uff09\u3002\u5b83\u4f7f\u7528\u4f4d\u5716\u4f86\u8868\u793a\u6bcf\u4e00\u884c\u7684\u503c\uff0c\u5f9e\u800c\u5728\u67e5\u8a62\u6642\u80fd\u5920\u5feb\u901f\u904e\u6ffe\u6578\u64da\u3002<\/p>\n<ul>\n<li><strong>\u7279\u9ede\uff1a<\/strong>\u7bc0\u7701\u7a7a\u9593\uff0c\u67e5\u8a62\u901f\u5ea6\u5feb\u3002<\/li>\n<li><strong>\u4f7f\u7528\u5834\u666f\uff1a<\/strong>\u9069\u5408\u65bc\u5206\u6790\u6027\u67e5\u8a62\u548c\u5831\u544a\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u5009\u5eab\u4e2d\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%af%84%e4%be%8b-pDGmryZHea\">\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE BITMAP INDEX idx_employee_gender ON employees(gender);<\/code><\/pre>\n<h2 id=\"3-%e5%94%af%e4%b8%80%e7%b4%a2%e5%bc%95%ef%bc%88unique-index%ef%bc%89-pDGmryZHea\">3. \u552f\u4e00\u7d22\u5f15\uff08Unique Index\uff09<\/h2>\n<p>\u552f\u4e00\u7d22\u5f15\u78ba\u4fdd\u7d22\u5f15\u5217\u4e2d\u7684\u6bcf\u500b\u503c\u90fd\u662f\u552f\u4e00\u7684\u3002\u9019\u7a2e\u7d22\u5f15\u901a\u5e38\u7528\u65bc\u4e3b\u9375\u548c\u552f\u4e00\u7d04\u675f\u7684\u5217\u3002<\/p>\n<ul>\n<li><strong>\u7279\u9ede\uff1a<\/strong>\u81ea\u52d5\u9632\u6b62\u91cd\u8907\u6578\u64da\u7684\u63d2\u5165\u3002<\/li>\n<li><strong>\u4f7f\u7528\u5834\u666f\uff1a<\/strong>\u9069\u5408\u65bc\u9700\u8981\u4fdd\u6301\u6578\u64da\u552f\u4e00\u6027\u7684\u5217\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%af%84%e4%be%8b-pDGmryZHea\">\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE UNIQUE INDEX idx_employee_email ON employees(email);<\/code><\/pre>\n<h2 id=\"4-%e5%87%bd%e6%95%b8%e7%b4%a2%e5%bc%95%ef%bc%88function-based-index%ef%bc%89-pDGmryZHea\">4. \u51fd\u6578\u7d22\u5f15\uff08Function-Based Index\uff09<\/h2>\n<p>\u51fd\u6578\u7d22\u5f15\u5141\u8a31\u5728\u7d22\u5f15\u4e2d\u4f7f\u7528\u8868\u9054\u5f0f\u6216\u51fd\u6578\u7684\u7d50\u679c\u3002\u9019\u5c0d\u65bc\u9700\u8981\u5c0d\u5217\u9032\u884c\u8a08\u7b97\u6216\u8f49\u63db\u7684\u67e5\u8a62\u7279\u5225\u6709\u7528\u3002<\/p>\n<ul>\n<li><strong>\u7279\u9ede\uff1a<\/strong>\u80fd\u5920\u63d0\u9ad8\u57fa\u65bc\u8a08\u7b97\u7d50\u679c\u7684\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u4f7f\u7528\u5834\u666f\uff1a<\/strong>\u9069\u5408\u65bc\u9700\u8981\u5c0d\u5217\u9032\u884c\u8a08\u7b97\u7684\u67e5\u8a62\uff0c\u5982\u65e5\u671f\u8f49\u63db\u6216\u5b57\u7b26\u4e32\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%af%84%e4%be%8b-pDGmryZHea\">\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE INDEX idx_employee_upper_name ON employees(UPPER(name));<\/code><\/pre>\n<h2 id=\"5-%e8%81%9a%e9%9b%86%e7%b4%a2%e5%bc%95%ef%bc%88clustered-index%ef%bc%89-pDGmryZHea\">5. \u805a\u96c6\u7d22\u5f15\uff08Clustered Index\uff09<\/h2>\n<p>\u805a\u96c6\u7d22\u5f15\u5c07\u6578\u64da\u884c\u7684\u7269\u7406\u9806\u5e8f\u8207\u7d22\u5f15\u7684\u908f\u8f2f\u9806\u5e8f\u76f8\u7d50\u5408\u3002\u9019\u610f\u5473\u8457\u6578\u64da\u884c\u7684\u5b58\u5132\u9806\u5e8f\u8207\u7d22\u5f15\u7684\u9806\u5e8f\u76f8\u540c\uff0c\u5f9e\u800c\u63d0\u9ad8\u4e86\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n<ul>\n<li><strong>\u7279\u9ede\uff1a<\/strong>\u63d0\u9ad8\u4e86\u7bc4\u570d\u67e5\u8a62\u7684\u6027\u80fd\u3002<\/li>\n<li><strong>\u4f7f\u7528\u5834\u666f\uff1a<\/strong>\u9069\u5408\u65bc\u9700\u8981\u6309\u7279\u5b9a\u9806\u5e8f\u6aa2\u7d22\u6578\u64da\u7684\u67e5\u8a62\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%af%84%e4%be%8b-pDGmryZHea\">\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE INDEX idx_employee_department ON employees(department) CLUSTERING;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-pDGmryZHea\">\u7e3d\u7d50<\/h2>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u5c0d\u65bc\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002B\u6a39\u7d22\u5f15\u3001\u4f4d\u5716\u7d22\u5f15\u3001\u552f\u4e00\u7d22\u5f15\u3001\u51fd\u6578\u7d22\u5f15\u548c\u805a\u96c6\u7d22\u5f15\u5404\u6709\u5176\u7279\u9ede\u548c\u9069\u7528\u5834\u666f\u3002\u4e86\u89e3\u9019\u4e9b\u7d22\u5f15\u7684\u7279\u6027\uff0c\u53ef\u4ee5\u5e6b\u52a9\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u548c\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u8a2d\u8a08\u6578\u64da\u5eab\u7d50\u69cb\uff0c\u5f9e\u800c\u63d0\u5347\u6574\u9ad4\u6027\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f\u5176\u4ed6\u96f2\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle\u6578\u64da\u5eab\u4e2d\u6700\u5e38\u7528\u7684\u7d22\u5f15\u985e\u578b\uff0c\u5305\u62ecB\u6a39\u7d22\u5f15\u3001\u4f4d\u5716\u7d22\u5f15\u548c\u53cd\u5411\u7d22\u5f15\uff0c\u63d0\u5347\u67e5\u8a62\u6027\u80fd\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-95978","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95978","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=95978"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95978\/revisions"}],"predecessor-version":[{"id":95979,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95978\/revisions\/95979"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95978"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95978"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}