{"id":81422,"date":"2024-10-16T15:40:18","date_gmt":"2024-10-16T07:40:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/81422\/"},"modified":"2024-10-16T15:40:18","modified_gmt":"2024-10-16T07:40:18","slug":"oracle%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83%e8%88%87%e5%9f%b7%e8%a1%8c%e9%a0%86%e5%ba%8f%e7%9a%84%e4%bb%a3%e7%a2%bc%e7%a4%ba%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/81422\/","title":{"rendered":"Oracle\u57f7\u884c\u8a08\u5283\u8207\u57f7\u884c\u9806\u5e8f\u7684\u4ee3\u78bc\u793a\u4f8b"},"content":{"rendered":"<h1 id=\"oracle%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83%e8%88%87%e5%9f%b7%e8%a1%8c%e9%a0%86%e5%ba%8f%e7%9a%84%e4%bb%a3%e7%a2%bc%e7%a4%ba%e4%be%8b-cQpRcORyvH\">Oracle\u57f7\u884c\u8a08\u5283\u8207\u57f7\u884c\u9806\u5e8f\u7684\u4ee3\u78bc\u793a\u4f8b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cOracle\u7684\u57f7\u884c\u8a08\u5283\u662f\u512a\u5316\u67e5\u8a62\u6027\u80fd\u7684\u95dc\u9375\u5de5\u5177\u3002\u57f7\u884c\u8a08\u5283\u986f\u793a\u4e86Oracle\u5982\u4f55\u57f7\u884cSQL\u67e5\u8a62\uff0c\u5305\u62ec\u4f7f\u7528\u7684\u8a2a\u554f\u8def\u5f91\u3001\u806f\u63a5\u985e\u578b\u548c\u64cd\u4f5c\u9806\u5e8f\u3002\u4e86\u89e3\u57f7\u884c\u8a08\u5283\u7684\u751f\u6210\u548c\u57f7\u884c\u9806\u5e8f\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u548c\u958b\u767c\u4eba\u54e1\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\uff0c\u56e0\u70ba\u9019\u53ef\u4ee5\u5e6b\u52a9\u4ed6\u5011\u8b58\u5225\u6027\u80fd\u74f6\u9838\u4e26\u9032\u884c\u76f8\u61c9\u7684\u512a\u5316\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83%ef%bc%9f-cQpRcORyvH\">\u4ec0\u9ebc\u662f\u57f7\u884c\u8a08\u5283\uff1f<\/h2>\n<p>\u57f7\u884c\u8a08\u5283\u662fOracle\u6578\u64da\u5eab\u5728\u57f7\u884cSQL\u67e5\u8a62\u6642\u6240\u9078\u64c7\u7684\u64cd\u4f5c\u6b65\u9a5f\u7684\u8a73\u7d30\u63cf\u8ff0\u3002\u5b83\u63d0\u4f9b\u4e86\u67e5\u8a62\u7684\u908f\u8f2f\u548c\u7269\u7406\u57f7\u884c\u6b65\u9a5f\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u8a2a\u554f\u65b9\u6cd5\uff08\u5982\u5168\u8868\u6383\u63cf\u3001\u7d22\u5f15\u6383\u63cf\uff09<\/li>\n<li>\u806f\u63a5\u65b9\u6cd5\uff08\u5982\u5d4c\u5957\u5faa\u74b0\u3001\u54c8\u5e0c\u806f\u63a5\uff09<\/li>\n<li>\u64cd\u4f5c\u7684\u57f7\u884c\u9806\u5e8f<\/li>\n<\/ul>\n<p>\u901a\u904e\u5206\u6790\u57f7\u884c\u8a08\u5283\uff0c\u958b\u767c\u4eba\u54e1\u53ef\u4ee5\u4e86\u89e3\u67e5\u8a62\u7684\u6027\u80fd\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u8abf\u6574\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e7%94%9f%e6%88%90%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83-cQpRcORyvH\">\u5982\u4f55\u751f\u6210\u57f7\u884c\u8a08\u5283<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u751f\u6210\u57f7\u884c\u8a08\u5283\uff1a<\/p>\n<pre><code>EXPLAIN PLAN FOR\nSELECT * FROM employees WHERE department_id = 10;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u8a9e\u53e5\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u67e5\u770b\u751f\u6210\u7684\u57f7\u884c\u8a08\u5283\uff1a<\/p>\n<pre><code>SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY());<\/code><\/pre>\n<p>\u9019\u5c07\u986f\u793a\u51fa\u8a72\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5305\u62ec\u6bcf\u500b\u6b65\u9a5f\u7684\u6210\u672c\u548c\u9810\u4f30\u884c\u6578\u3002<\/p>\n<h2 id=\"%e5%9f%b7%e8%a1%8c%e9%a0%86%e5%ba%8f%e7%9a%84%e5%bd%b1%e9%9f%bf-cQpRcORyvH\">\u57f7\u884c\u9806\u5e8f\u7684\u5f71\u97ff<\/h2>\n<p>\u57f7\u884c\u8a08\u5283\u4e2d\u7684\u64cd\u4f5c\u9806\u5e8f\u5c0d\u67e5\u8a62\u6027\u80fd\u6709\u8457\u76f4\u63a5\u5f71\u97ff\u3002Oracle\u6703\u6839\u64da\u591a\u7a2e\u56e0\u7d20\u4f86\u6c7a\u5b9a\u6700\u4f73\u7684\u57f7\u884c\u9806\u5e8f\uff0c\u5305\u62ec\u7d71\u8a08\u4fe1\u606f\u3001\u7d22\u5f15\u7684\u53ef\u7528\u6027\u548c\u67e5\u8a62\u7684\u8907\u96dc\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5f71\u97ff\u57f7\u884c\u9806\u5e8f\u7684\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li><strong>\u7d71\u8a08\u4fe1\u606f\uff1a<\/strong>Oracle\u4f7f\u7528\u8868\u548c\u7d22\u5f15\u7684\u7d71\u8a08\u4fe1\u606f\u4f86\u4f30\u7b97\u6bcf\u500b\u64cd\u4f5c\u7684\u6210\u672c\uff0c\u5f9e\u800c\u9078\u64c7\u6700\u4f73\u7684\u57f7\u884c\u9806\u5e8f\u3002<\/li>\n<li><strong>\u7d22\u5f15\u7684\u4f7f\u7528\uff1a<\/strong>\u5982\u679c\u67e5\u8a62\u4e2d\u6d89\u53ca\u7684\u5217\u6709\u7d22\u5f15\uff0cOracle\u53ef\u80fd\u6703\u9078\u64c7\u4f7f\u7528\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62\u3002<\/li>\n<li><strong>\u806f\u63a5\u7684\u9806\u5e8f\uff1a<\/strong>\u5728\u591a\u8868\u67e5\u8a62\u4e2d\uff0c\u806f\u63a5\u7684\u9806\u5e8f\u6703\u5f71\u97ff\u6574\u9ad4\u6027\u80fd\u3002Oracle\u6703\u6839\u64da\u8868\u7684\u5927\u5c0f\u548c\u806f\u63a5\u689d\u4ef6\u4f86\u6c7a\u5b9a\u6700\u4f73\u7684\u806f\u63a5\u9806\u5e8f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bb%a3%e7%a2%bc%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83-cQpRcORyvH\">\u4ee3\u78bc\u793a\u4f8b\uff1a\u512a\u5316\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u901a\u904e\u8abf\u6574\u67e5\u8a62\u4f86\u512a\u5316\u57f7\u884c\u8a08\u5283\uff1a<\/p>\n<pre><code>-- \u539f\u59cb\u67e5\u8a62\nSELECT e.first_name, e.last_name, d.department_name\nFROM employees e, departments d\nWHERE e.department_id = d.department_id\nAND d.location_id = 1000;\n\n-- \u512a\u5316\u5f8c\u7684\u67e5\u8a62\nSELECT e.first_name, e.last_name, d.department_name\nFROM employees e\nJOIN departments d ON e.department_id = d.department_id\nWHERE d.location_id = 1000;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u4f7f\u7528JOIN\u8a9e\u6cd5\u4ee3\u66ff\u4e86\u9017\u865f\u5206\u9694\u7684\u8868\u540d\uff0c\u9019\u6a23\u53ef\u4ee5\u4f7f\u67e5\u8a62\u66f4\u6e05\u6670\uff0c\u4e26\u53ef\u80fd\u5e6b\u52a9Oracle\u751f\u6210\u66f4\u6709\u6548\u7684\u57f7\u884c\u8a08\u5283\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-cQpRcORyvH\">\u7d50\u8ad6<\/h2>\n<p>\u7406\u89e3Oracle\u7684\u57f7\u884c\u8a08\u5283\u548c\u57f7\u884c\u9806\u5e8f\u5c0d\u65bc\u512a\u5316SQL\u67e5\u8a62\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u751f\u6210\u548c\u5206\u6790\u57f7\u884c\u8a08\u5283\uff0c\u958b\u767c\u4eba\u54e1\u53ef\u4ee5\u8b58\u5225\u6027\u80fd\u74f6\u9838\u4e26\u9032\u884c\u76f8\u61c9\u7684\u8abf\u6574\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u9084\u80fd\u63d0\u5347\u6574\u9ad4\u7cfb\u7d71\u7684\u6548\u7387\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u9ad8\u6548\u7684\u74b0\u5883\u4e2d\u904b\u884cOracle\u6578\u64da\u5eab\uff0c\u60a8\u53ef\u4ee5\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u89e3\u6c7a\u65b9\u6848\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u6578\u64da\u5eab\u63d0\u4f9b\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle\u57f7\u884c\u8a08\u5283\u8207\u57f7\u884c\u9806\u5e8f\u7684\u4ee3\u78bc\u793a\u4f8b\uff0c\u6df1\u5165\u4e86\u89e3\u67e5\u8a62\u6027\u80fd\u512a\u5316\u7684\u95dc\u9375\u6280\u8853\u8207\u5be6\u8e10\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-81422","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/81422","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=81422"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/81422\/revisions"}],"predecessor-version":[{"id":81423,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/81422\/revisions\/81423"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=81422"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=81422"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=81422"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}