{"id":95786,"date":"2024-10-20T03:59:15","date_gmt":"2024-10-19T19:59:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95786\/"},"modified":"2024-10-20T03:59:16","modified_gmt":"2024-10-19T19:59:16","slug":"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a6%82%e4%bd%95%e7%b5%b1%e8%a8%88%e4%b8%80%e5%88%97%e6%95%b8%e6%93%9a-oracle%e7%b5%b1%e8%a8%88%e4%b8%80%e5%88%97%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95786\/","title":{"rendered":"Oracle\u6578\u64da\u5eab\u5982\u4f55\u7d71\u8a08\u4e00\u5217\u6578\u64da (oracle\u7d71\u8a08\u4e00\u5217\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a6%82%e4%bd%95%e7%b5%b1%e8%a8%88%e4%b8%80%e5%88%97%e6%95%b8%e6%93%9a-NZBKuoaAos\">Oracle\u6578\u64da\u5eab\u5982\u4f55\u7d71\u8a08\u4e00\u5217\u6578\u64da<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7d71\u8a08\u6578\u64da\u662f\u4e00\u500b\u91cd\u8981\u7684\u4efb\u52d9\uff0c\u5c24\u5176\u662f\u5728\u4f7f\u7528Oracle\u6578\u64da\u5eab\u6642\u3002\u7d71\u8a08\u6578\u64da\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u4e86\u89e3\u6578\u64da\u7684\u5206\u4f48\u60c5\u6cc1\uff0c\u5f9e\u800c\u512a\u5316\u67e5\u8a62\u6027\u80fd\u548c\u6578\u64da\u5206\u6790\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728Oracle\u6578\u64da\u5eab\u4e2d\u7d71\u8a08\u4e00\u5217\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e7%b5%b1%e8%a8%88%e6%95%b8%e6%93%9a%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-NZBKuoaAos\">\u7d71\u8a08\u6578\u64da\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u7d71\u8a08\u6578\u64da\u662f\u6307\u5c0d\u6578\u64da\u96c6\u9032\u884c\u5206\u6790\u5f8c\u5f97\u51fa\u7684\u6578\u64da\u7279\u5fb5\uff0c\u5305\u62ec\u6700\u5c0f\u503c\u3001\u6700\u5927\u503c\u3001\u5e73\u5747\u503c\u3001\u6a19\u6e96\u5dee\u7b49\u3002\u9019\u4e9b\u7d71\u8a08\u6578\u64da\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u7684\u7279\u6027\uff0c\u4e26\u5728\u9032\u884c\u67e5\u8a62\u6642\u505a\u51fa\u66f4\u6709\u6548\u7684\u6c7a\u7b56\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8sql%e9%80%b2%e8%a1%8c%e6%95%b8%e6%93%9a%e7%b5%b1%e8%a8%88-NZBKuoaAos\">\u4f7f\u7528SQL\u9032\u884c\u6578\u64da\u7d71\u8a08<\/h2>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528SQL\u8a9e\u53e5\u4f86\u7d71\u8a08\u4e00\u5217\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u7d71\u8a08\u51fd\u6578\uff1a<\/p>\n<ul>\n<li><code>COUNT()<\/code>\uff1a\u8a08\u7b97\u884c\u6578\u3002<\/li>\n<li><code>SUM()<\/code>\uff1a\u8a08\u7b97\u6578\u503c\u7684\u7e3d\u548c\u3002<\/li>\n<li><code>AVG()<\/code>\uff1a\u8a08\u7b97\u5e73\u5747\u503c\u3002<\/li>\n<li><code>MIN()<\/code>\uff1a\u67e5\u627e\u6700\u5c0f\u503c\u3002<\/li>\n<li><code>MAX()<\/code>\uff1a\u67e5\u627e\u6700\u5927\u503c\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e7%b5%b1%e8%a8%88%e4%b8%80%e5%88%97%e6%95%b8%e6%93%9a-NZBKuoaAos\">\u793a\u4f8b\uff1a\u7d71\u8a08\u4e00\u5217\u6578\u64da<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>employees<\/code>\u7684\u8868\uff0c\u8a72\u8868\u5305\u542b\u54e1\u5de5\u7684\u85aa\u8cc7\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528SQL\u8a9e\u53e5\u4f86\u7d71\u8a08\u85aa\u8cc7\u5217\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT \n    COUNT(salary) AS total_employees,\n    SUM(salary) AS total_salary,\n    AVG(salary) AS average_salary,\n    MIN(salary) AS min_salary,\n    MAX(salary) AS max_salary\nFROM \n    employees;<\/code><\/pre>\n<p>\u9019\u6bb5SQL\u8a9e\u53e5\u5c07\u8fd4\u56de\u4ee5\u4e0b\u7d71\u8a08\u6578\u64da\uff1a<\/p>\n<ul>\n<li>\u7e3d\u54e1\u5de5\u6578<\/li>\n<li>\u7e3d\u85aa\u8cc7<\/li>\n<li>\u5e73\u5747\u85aa\u8cc7<\/li>\n<li>\u6700\u4f4e\u85aa\u8cc7<\/li>\n<li>\u6700\u9ad8\u85aa\u8cc7<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8group-by%e9%80%b2%e8%a1%8c%e5%88%86%e7%b5%84%e7%b5%b1%e8%a8%88-NZBKuoaAos\">\u4f7f\u7528GROUP BY\u9032\u884c\u5206\u7d44\u7d71\u8a08<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u5e0c\u671b\u6839\u64da\u67d0\u500b\u7279\u5b9a\u7684\u5217\u9032\u884c\u5206\u7d44\u7d71\u8a08\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u6839\u64da\u90e8\u9580\u4f86\u7d71\u8a08\u6bcf\u500b\u90e8\u9580\u7684\u5e73\u5747\u85aa\u8cc7\u3002\u4ee5\u4e0b\u662f\u76f8\u61c9\u7684SQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT \n    department_id,\n    AVG(salary) AS average_salary\nFROM \n    employees\nGROUP BY \n    department_id;<\/code><\/pre>\n<p>\u9019\u6bb5SQL\u8a9e\u53e5\u5c07\u8fd4\u56de\u6bcf\u500b\u90e8\u9580\u7684\u5e73\u5747\u85aa\u8cc7\uff0c\u5e6b\u52a9\u7ba1\u7406\u5c64\u4e86\u89e3\u5404\u90e8\u9580\u7684\u85aa\u8cc7\u7d50\u69cb\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e8%a6%96%e5%9c%96%e9%80%b2%e8%a1%8c%e7%b5%b1%e8%a8%88-NZBKuoaAos\">\u4f7f\u7528\u8996\u5716\u9032\u884c\u7d71\u8a08<\/h2>\n<p>\u5982\u679c\u60a8\u9700\u8981\u7d93\u5e38\u9032\u884c\u76f8\u540c\u7684\u7d71\u8a08\u64cd\u4f5c\uff0c\u53ef\u4ee5\u8003\u616e\u5275\u5efa\u4e00\u500b\u8996\u5716\u3002\u8996\u5716\u662f\u4e00\u500b\u865b\u64ec\u8868\uff0c\u53ef\u4ee5\u7c21\u5316\u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u8996\u5716\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE VIEW salary_statistics AS\nSELECT \n    COUNT(salary) AS total_employees,\n    SUM(salary) AS total_salary,\n    AVG(salary) AS average_salary,\n    MIN(salary) AS min_salary,\n    MAX(salary) AS max_salary\nFROM \n    employees;<\/code><\/pre>\n<p>\u5275\u5efa\u8996\u5716\u5f8c\uff0c\u60a8\u53ef\u4ee5\u901a\u904e\u7c21\u55ae\u7684\u67e5\u8a62\u4f86\u7372\u53d6\u7d71\u8a08\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM salary_statistics;<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-NZBKuoaAos\">\u7d50\u8ad6<\/h2>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u7d71\u8a08\u4e00\u5217\u6578\u64da\u662f\u4e00\u500b\u7c21\u55ae\u800c\u6709\u6548\u7684\u904e\u7a0b\u3002\u901a\u904e\u4f7f\u7528SQL\u8a9e\u53e5\u548c\u7d71\u8a08\u51fd\u6578\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\u7279\u5fb5\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u5206\u7d44\u7d71\u8a08\u6216\u5275\u5efa\u8996\u5716\u3002\u9019\u4e9b\u6280\u8853\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6578\u64da\u5206\u6790\u7684\u6548\u7387\uff0c\u9084\u80fd\u5e6b\u52a9\u4f01\u696d\u505a\u51fa\u66f4\u660e\u667a\u7684\u6c7a\u7b56\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u554f\u984c\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\uff0c\u63a2\u7d22\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u52a9\u60a8\u5728\u6578\u64da\u7ba1\u7406\u4e0a\u66f4\u4e0a\u4e00\u5c64\u6a13\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728Oracle\u6578\u64da\u5eab\u4e2d\u7d71\u8a08\u4e00\u5217\u6578\u64da\uff0c\u638c\u63e1\u4f7f\u7528SQL\u67e5\u8a62\u9032\u884c\u6578\u64da\u5206\u6790\u7684\u6280\u5de7\u8207\u65b9\u6cd5\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-95786","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95786","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=95786"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95786\/revisions"}],"predecessor-version":[{"id":95787,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95786\/revisions\/95787"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}