{"id":164391,"date":"2024-11-05T07:30:27","date_gmt":"2024-11-04T23:30:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/164391\/"},"modified":"2024-11-05T07:30:28","modified_gmt":"2024-11-04T23:30:28","slug":"%e7%b2%be%e7%85%89%e6%a6%82%e8%bf%b0oracle-sql%e8%aa%9e%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/164391\/","title":{"rendered":"\u7cbe\u7149\u6982\u8ff0Oracle SQL\u8a9e\u53e5"},"content":{"rendered":"<h1 id=\"%e7%b2%be%e7%85%89%e6%a6%82%e8%bf%b0oracle-sql%e8%aa%9e%e5%8f%a5-rStyguZFeQ\">\u7cbe\u7149\u6982\u8ff0Oracle SQL\u8a9e\u53e5<\/h1>\n<p>Oracle SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u7528\u65bc\u8207Oracle\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u7684\u4e3b\u8981\u8a9e\u8a00\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u5957\u5f37\u5927\u7684\u5de5\u5177\u4f86\u67e5\u8a62\u3001\u66f4\u65b0\u548c\u7ba1\u7406\u6578\u64da\u3002\u672c\u6587\u5c07\u5c0dOracle SQL\u8a9e\u53e5\u9032\u884c\u7cbe\u7149\u6982\u8ff0\uff0c\u5e6b\u52a9\u8b80\u8005\u7406\u89e3\u5176\u57fa\u672c\u7d50\u69cb\u548c\u5e38\u7528\u529f\u80fd\u3002<\/p>\n<h2 id=\"oracle-sql%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-rStyguZFeQ\">Oracle SQL\u7684\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>Oracle SQL\u8a9e\u53e5\u901a\u5e38\u7531\u4ee5\u4e0b\u5e7e\u500b\u90e8\u5206\u7d44\u6210\uff1a<\/p>\n<ul>\n<li><strong>\u9078\u64c7\uff08SELECT\uff09<\/strong>\uff1a\u7528\u65bc\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u3002<\/li>\n<li><strong>\u5f9e\uff08FROM\uff09<\/strong>\uff1a\u6307\u5b9a\u8981\u67e5\u8a62\u7684\u6578\u64da\u8868\u3002<\/li>\n<li><strong>\u689d\u4ef6\uff08WHERE\uff09<\/strong>\uff1a\u7528\u65bc\u904e\u6ffe\u67e5\u8a62\u7d50\u679c\u3002<\/li>\n<li><strong>\u6392\u5e8f\uff08ORDER BY\uff09<\/strong>\uff1a\u7528\u65bc\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u6392\u5e8f\u3002<\/li>\n<li><strong>\u5206\u7d44\uff08GROUP BY\uff09<\/strong>\uff1a\u7528\u65bc\u5c07\u7d50\u679c\u96c6\u5206\u7d44\u3002<\/li>\n<li><strong>\u805a\u5408\u51fd\u6578\uff08\u5982SUM\u3001AVG\u7b49\uff09<\/strong>\uff1a\u7528\u65bc\u8a08\u7b97\u5206\u7d44\u6578\u64da\u7684\u7d71\u8a08\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e6%9f%a5%e8%a9%a2%e7%a4%ba%e4%be%8b-rStyguZFeQ\">\u57fa\u672c\u67e5\u8a62\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u67e5\u8a62\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528Oracle SQL\u8a9e\u53e5\u4f86\u6aa2\u7d22\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT employee_id, first_name, last_name\nFROM employees\nWHERE department_id = 10\nORDER BY last_name;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5f9e\u540d\u70ba\u201cemployees\u201d\u7684\u8868\u4e2d\u9078\u64c7\u4e86\u54e1\u5de5\u7684ID\u3001\u540d\u5b57\u548c\u59d3\u6c0f\uff0c\u4e26\u4e14\u53ea\u6aa2\u7d22\u90e8\u9580ID\u70ba10\u7684\u54e1\u5de5\uff0c\u6700\u5f8c\u6309\u59d3\u6c0f\u9032\u884c\u6392\u5e8f\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b8-rStyguZFeQ\">\u4f7f\u7528\u805a\u5408\u51fd\u6578<\/h2>\n<p>\u805a\u5408\u51fd\u6578\u5728\u6578\u64da\u5206\u6790\u4e2d\u975e\u5e38\u6709\u7528\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u805a\u5408\u51fd\u6578\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT department_id, COUNT(*) AS employee_count\nFROM employees\nGROUP BY department_id\nORDER BY employee_count DESC;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6bcf\u500b\u90e8\u9580\u7684\u54e1\u5de5\u6578\u91cf\uff0c\u4e26\u6309\u54e1\u5de5\u6578\u91cf\u964d\u5e8f\u6392\u5217\u3002<\/p>\n<h2 id=\"%e5%ad%90%e6%9f%a5%e8%a9%a2%e7%9a%84%e4%bd%bf%e7%94%a8-rStyguZFeQ\">\u5b50\u67e5\u8a62\u7684\u4f7f\u7528<\/h2>\n<p>\u5b50\u67e5\u8a62\u662f\u6307\u5728\u4e00\u500b\u67e5\u8a62\u4e2d\u5d4c\u5957\u53e6\u4e00\u500b\u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u5b50\u67e5\u8a62\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT first_name, last_name\nFROM employees\nWHERE department_id = (SELECT department_id\n                       FROM departments\n                       WHERE department_name = 'Sales');<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u5728\u201cSales\u201d\u90e8\u9580\u5de5\u4f5c\u7684\u54e1\u5de5\u7684\u540d\u5b57\u548c\u59d3\u6c0f\u3002<\/p>\n<h2 id=\"%e6%9b%b4%e6%96%b0%e5%92%8c%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a-rStyguZFeQ\">\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da<\/h2>\n<p>\u9664\u4e86\u67e5\u8a62\u6578\u64da\uff0cOracle SQL\u9084\u5141\u8a31\u7528\u6236\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u66f4\u65b0\u548c\u522a\u9664\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>UPDATE employees\nSET salary = salary * 1.1\nWHERE department_id = 10;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u6240\u6709\u90e8\u9580ID\u70ba10\u7684\u54e1\u5de5\u7684\u85aa\u6c34\u63d0\u9ad810%\u3002<\/p>\n<pre><code>DELETE FROM employees\nWHERE employee_id = 123;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u522a\u9664\u54e1\u5de5ID\u70ba123\u7684\u54e1\u5de5\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-rStyguZFeQ\">\u7d50\u8ad6<\/h2>\n<p>Oracle SQL\u8a9e\u53e5\u662f\u6578\u64da\u5eab\u7ba1\u7406\u548c\u64cd\u4f5c\u7684\u6838\u5fc3\u5de5\u5177\u3002\u901a\u904e\u638c\u63e1\u57fa\u672c\u7684\u67e5\u8a62\u3001\u805a\u5408\u51fd\u6578\u3001\u5b50\u67e5\u8a62\u4ee5\u53ca\u6578\u64da\u66f4\u65b0\u548c\u522a\u9664\u64cd\u4f5c\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u5206\u6790\u6578\u64da\u3002\u96a8\u8457\u5c0dOracle SQL\u7684\u6df1\u5165\u4e86\u89e3\uff0c\u4f7f\u7528\u8005\u80fd\u5920\u66f4\u597d\u5730\u5229\u7528\u6578\u64da\u5eab\u7684\u5f37\u5927\u529f\u80fd\uff0c\u63d0\u5347\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7cbe\u7149\u6982\u8ff0Oracle SQL\u8a9e\u53e5\uff0c\u6df1\u5165\u89e3\u6790\u5176\u8a9e\u6cd5\u3001\u529f\u80fd\u53ca\u61c9\u7528\uff0c\u52a9\u60a8\u9ad8\u6548\u7ba1\u7406\u6578\u64da\u5eab\u64cd\u4f5c\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-164391","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164391","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=164391"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164391\/revisions"}],"predecessor-version":[{"id":164392,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164391\/revisions\/164392"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=164391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=164391"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=164391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}