{"id":171917,"date":"2024-11-07T08:45:21","date_gmt":"2024-11-07T00:45:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/171917\/"},"modified":"2024-11-07T08:45:22","modified_gmt":"2024-11-07T00:45:22","slug":"%e8%bc%95%e9%ac%86%e6%8e%8c%e6%8f%a1%ef%bc%9aoracle%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e6%89%be%e7%b4%a2%e5%bc%95%e6%8a%80%e5%b7%a7-oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e7%b4%a2%e5%bc%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/171917\/","title":{"rendered":"\u8f15\u9b06\u638c\u63e1\uff1aOracle\u6578\u64da\u5eab\u67e5\u627e\u7d22\u5f15\u6280\u5de7 (Oracle\u6578\u64da\u5eab\u67e5\u7d22\u5f15)"},"content":{"rendered":"<h1 id=\"%e8%bc%95%e9%ac%86%e6%8e%8c%e6%8f%a1%ef%bc%9aoracle%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e6%89%be%e7%b4%a2%e5%bc%95%e6%8a%80%e5%b7%a7-oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e7%b4%a2%e5%bc%95-hBVgWszyJf\">\u8f15\u9b06\u638c\u63e1\uff1aOracle\u6578\u64da\u5eab\u67e5\u627e\u7d22\u5f15\u6280\u5de7 (Oracle\u6578\u64da\u5eab\u67e5\u7d22\u5f15)<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002Oracle\u6578\u64da\u5eab\u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u7d22\u5f15\u6280\u8853\u4f86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u6578\u64da\u5eab\u4e2d\u7684\u67e5\u627e\u7d22\u5f15\u6280\u5de7\uff0c\u5e6b\u52a9\u7528\u6236\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u512a\u5316\u6578\u64da\u5eab\u67e5\u8a62\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%b4%a2%e5%bc%95%ef%bc%9f-hBVgWszyJf\">\u4ec0\u9ebc\u662f\u7d22\u5f15\uff1f<\/h2>\n<p>\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u7528\u65bc\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\u5230\u6240\u9700\u7684\u6578\u64da\u884c\u3002Oracle\u6578\u64da\u5eab\u652f\u6301\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u5305\u62ecB\u6a39\u7d22\u5f15\u3001\u4f4d\u5716\u7d22\u5f15\u3001\u53cd\u5411\u7d22\u5f15\u7b49\uff0c\u6bcf\u7a2e\u7d22\u5f15\u90fd\u6709\u5176\u7279\u5b9a\u7684\u4f7f\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e8%a6%8b%e7%9a%84%e7%b4%a2%e5%bc%95%e9%a1%9e%e5%9e%8b-hBVgWszyJf\">\u5e38\u898b\u7684\u7d22\u5f15\u985e\u578b<\/h2>\n<ul>\n<li><strong>B\u6a39\u7d22\u5f15\uff1a<\/strong>\u6700\u5e38\u7528\u7684\u7d22\u5f15\u985e\u578b\uff0c\u9069\u5408\u65bc\u9ad8\u57fa\u6578\u7684\u5217\u3002\u5b83\u80fd\u5920\u5feb\u901f\u67e5\u627e\u548c\u7bc4\u570d\u67e5\u8a62\u3002<\/li>\n<li><strong>\u4f4d\u5716\u7d22\u5f15\uff1a<\/strong>\u9069\u5408\u65bc\u4f4e\u57fa\u6578\u7684\u5217\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u5009\u5eab\u74b0\u5883\u4e2d\uff0c\u80fd\u5920\u6709\u6548\u5730\u58d3\u7e2e\u6578\u64da\u3002<\/li>\n<li><strong>\u53cd\u5411\u7d22\u5f15\uff1a<\/strong>\u4e3b\u8981\u7528\u65bc\u8655\u7406\u5927\u91cf\u7684\u6587\u672c\u6578\u64da\uff0c\u80fd\u5920\u63d0\u9ad8\u5c0d\u5b57\u7b26\u4e32\u7684\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<li><strong>\u51fd\u6578\u7d22\u5f15\uff1a<\/strong>\u5141\u8a31\u5c0d\u8868\u4e2d\u7684\u5217\u9032\u884c\u8a08\u7b97\u6216\u8f49\u63db\u5f8c\u5efa\u7acb\u7d22\u5f15\uff0c\u9069\u5408\u65bc\u9700\u8981\u9032\u884c\u8a08\u7b97\u7684\u67e5\u8a62\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%89%b5%e5%bb%ba%e7%b4%a2%e5%bc%95-hBVgWszyJf\">\u5982\u4f55\u5275\u5efa\u7d22\u5f15<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u5275\u5efa\u7d22\u5f15\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE INDEX index_name ON table_name (column_name);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5728\u540d\u70ba\u201cemployees\u201d\u7684\u8868\u4e0a\u70ba\u201clast_name\u201d\u5217\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE INDEX idx_lastname ON employees (last_name);<\/code><\/pre>\n<h2 id=\"%e6%9f%a5%e6%89%be%e7%b4%a2%e5%bc%95%e7%9a%84%e6%8a%80%e5%b7%a7-hBVgWszyJf\">\u67e5\u627e\u7d22\u5f15\u7684\u6280\u5de7<\/h2>\n<h3 id=\"1-%e9%81%b8%e6%93%87%e5%90%88%e9%81%a9%e7%9a%84%e7%b4%a2%e5%bc%95%e9%a1%9e%e5%9e%8b-hBVgWszyJf\">1. \u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b<\/h3>\n<p>\u6839\u64da\u6578\u64da\u7684\u7279\u6027\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u95dc\u9375\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u7d93\u5e38\u9032\u884c\u7bc4\u570d\u67e5\u8a62\u7684\u5217\uff0cB\u6a39\u7d22\u5f15\u662f\u6700\u4f73\u9078\u64c7\uff1b\u800c\u5c0d\u65bc\u9700\u8981\u9032\u884c\u5927\u91cf\u805a\u5408\u64cd\u4f5c\u7684\u5217\uff0c\u4f4d\u5716\u7d22\u5f15\u5247\u66f4\u70ba\u5408\u9069\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e8%a4%87%e5%90%88%e7%b4%a2%e5%bc%95-hBVgWszyJf\">2. \u4f7f\u7528\u8907\u5408\u7d22\u5f15<\/h3>\n<p>\u7576\u67e5\u8a62\u6d89\u53ca\u591a\u500b\u5217\u6642\uff0c\u4f7f\u7528\u8907\u5408\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6027\u80fd\u3002\u8907\u5408\u7d22\u5f15\u662f\u6307\u5728\u591a\u500b\u5217\u4e0a\u5275\u5efa\u7684\u7d22\u5f15\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE INDEX idx_emp_name ON employees (first_name, last_name);<\/code><\/pre>\n<h3 id=\"3-%e5%ae%9a%e6%9c%9f%e9%87%8d%e5%bb%ba%e7%b4%a2%e5%bc%95-hBVgWszyJf\">3. \u5b9a\u671f\u91cd\u5efa\u7d22\u5f15<\/h3>\n<p>\u96a8\u8457\u6578\u64da\u7684\u589e\u9577\u548c\u8b8a\u5316\uff0c\u7d22\u5f15\u53ef\u80fd\u6703\u8b8a\u5f97\u4e0d\u518d\u9ad8\u6548\u3002\u5b9a\u671f\u91cd\u5efa\u7d22\u5f15\u53ef\u4ee5\u5e6b\u52a9\u7dad\u6301\u67e5\u8a62\u6027\u80fd\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u91cd\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>ALTER INDEX index_name REBUILD;<\/code><\/pre>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8explain-plan%e5%88%86%e6%9e%90%e6%9f%a5%e8%a9%a2-hBVgWszyJf\">4. \u4f7f\u7528EXPLAIN PLAN\u5206\u6790\u67e5\u8a62<\/h3>\n<p>\u4f7f\u7528EXPLAIN PLAN\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u4e86\u89e3\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5f9e\u800c\u5224\u65b7\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u6cc1\u3002\u9019\u5c0d\u65bc\u512a\u5316\u67e5\u8a62\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<pre><code>EXPLAIN PLAN FOR SELECT * FROM employees WHERE last_name = 'Smith';<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-hBVgWszyJf\">\u7d50\u8ad6<\/h2>\n<p>\u638c\u63e1Oracle\u6578\u64da\u5eab\u7684\u67e5\u627e\u7d22\u5f15\u6280\u5de7\u4e0d\u50c5\u80fd\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u9084\u80fd\u6709\u6548\u7ba1\u7406\u6578\u64da\u5eab\u8cc7\u6e90\u3002\u901a\u904e\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u3001\u4f7f\u7528\u8907\u5408\u7d22\u5f15\u3001\u5b9a\u671f\u91cd\u5efa\u7d22\u5f15\u4ee5\u53ca\u5206\u6790\u67e5\u8a62\u8a08\u5283\uff0c\u7528\u6236\u53ef\u4ee5\u986f\u8457\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u7684\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9019\u4e9b\u6280\u5de7\u7121\u7591\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u548c\u512a\u5316\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u6211\u5011\u63d0\u4f9b\u5404\u7a2e <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\u548c\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1Oracle\u6578\u64da\u5eab\u67e5\u627e\u7d22\u5f15\u6280\u5de7\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u7c21\u5316\u6578\u64da\u7ba1\u7406\uff0c\u8b93\u6578\u64da\u64cd\u4f5c\u66f4\u8f15\u9b06\u4fbf\u6377\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-171917","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171917","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=171917"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171917\/revisions"}],"predecessor-version":[{"id":171918,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171917\/revisions\/171918"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=171917"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=171917"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=171917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}