{"id":199993,"date":"2025-05-06T11:07:57","date_gmt":"2025-05-06T03:07:57","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199993\/"},"modified":"2025-05-06T11:07:57","modified_gmt":"2025-05-06T03:07:57","slug":"%e7%a4%ba%e4%be%8b%ef%bc%9aoracle-sql%e4%b8%ad%e7%9a%84%e9%99%a4%e6%b3%95%e8%bf%90%e7%ae%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199993\/","title":{"rendered":"\u793a\u4f8b\uff1aOracle SQL\u4e2d\u7684\u9664\u6cd5\u8fd0\u7b97"},"content":{"rendered":"

<\/b> <\/p>\n

\u793a\u4f8b\uff1aOracle SQL\u4e2d\u7684\u9664\u6cd5\u8fd0\u7b97<\/h1>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

\u6807\u9898\uff1aOracle SQL\u4e2d\u9664\u6cd5\u8fd0\u7b97\u793a\u4f8b<\/p>\n

\u5728Oracle SQL\u6570\u636e\u5e93\u4e2d\uff0c\u9664\u6cd5\u8fd0\u7b97\u662f\u5e38\u89c1\u4e14\u91cd\u8981\u7684\u8fd0\u7b97\u4e4b\u4e00\u3002\u5bf9\u4e8e\u9700\u8981\u5bf9\u6570\u636e\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\u7684\u60c5\u51b5\uff0c\u6211\u4eec\u53ef\u4ee5\u501f\u52a9Oracle SQL\u63d0\u4f9b\u7684\u7279\u5b9a\u51fd\u6570\u548c\u8fd0\u7b97\u7b26\u6765\u5b9e\u73b0\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5728Oracle SQL\u4e2d\u5982\u4f55\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

\u5728Oracle SQL\u4e2d\uff0c\u9664\u6cd5\u8fd0\u7b97\u53ef\u4ee5\u4f7f\u7528\u9664\u6cd5\u8fd0\u7b97\u7b26\uff08\/\uff09\u6216\u8005DIV\u51fd\u6570\u6765\u5b9e\u73b0\u3002\u9664\u6cd5\u8fd0\u7b97\u7b26\u7528\u4e8e\u6267\u884c\u4e24\u4e2a\u6570\u503c\u4e4b\u95f4\u7684\u9664\u6cd5\u8fd0\u7b97\uff0c\u800cDIV\u51fd\u6570\u5219\u7528\u4e8e\u6267\u884c\u6574\u6570\u4e4b\u95f4\u7684\u9664\u6cd5\u8fd0\u7b97\u5e76\u8fd4\u56de\u6574\u6570\u7ed3\u679c\u3002<\/p>\n

\u4e0b\u9762\u901a\u8fc7\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u6f14\u793a\u5728Oracle SQL\u4e2d\u5982\u4f55\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\uff1a<\/p>\n

\u4f7f\u7528\u9664\u6cd5\u8fd0\u7b97\u7b26\uff08\/\uff09\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97<\/h3>\n

\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u8868\u683cstudent_scores<\/code>\uff0c\u5305\u542b\u5b66\u751f\u59d3\u540d\u548c\u5bf9\u5e94\u7684\u6570\u5b66\u6210\u7ee9\u548c\u82f1\u8bed\u6210\u7ee9\u3002\u6211\u4eec\u60f3\u8981\u8ba1\u7b97\u6bcf\u4e2a\u5b66\u751f\u7684\u6570\u5b66\u548c\u82f1\u8bed\u6210\u7ee9\u7684\u5e73\u5747\u5206\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u9664\u6cd5\u8fd0\u7b97\u7b26\uff08\/\uff09\u6765\u5c06\u4e24\u79d1\u6210\u7ee9\u76f8\u52a0\u5e76\u9664\u4ee52\u6765\u8ba1\u7b97\u5e73\u5747\u5206\uff0c\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

SELECT student_name, (math_score + english_score) \/ 2 AS average_score\nFROM student_scores;<\/pre>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u9664\u6cd5\u8fd0\u7b97\u7b26\uff08\/\uff09\u6765\u5c06\u5b66\u751f\u7684\u6570\u5b66\u6210\u7ee9\u548c\u82f1\u8bed\u6210\u7ee9\u76f8\u52a0\uff0c\u7136\u540e\u9664\u4ee52\u6765\u8ba1\u7b97\u5e73\u5747\u5206\u3002<\/p>\n
\u4f7f\u7528DIV\u51fd\u6570\u8fdb\u884c\u6574\u6570\u9664\u6cd5\u8fd0\u7b97<\/h3>\n
\u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u5bf9\u6574\u6570\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\u5e76\u5f97\u5230\u6574\u6570\u7ed3\u679c\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Oracle SQL\u63d0\u4f9b\u7684DIV\u51fd\u6570\u3002\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u8868\u683cemployee_sales<\/code>\uff0c\u5305\u542b\u5458\u5de5\u59d3\u540d\u548c\u5bf9\u5e94\u7684\u9500\u552e\u989d\u3002\u6211\u4eec\u60f3\u8981\u8ba1\u7b97\u6bcf\u4f4d\u5458\u5de5\u7684\u9500\u552e\u989d\u9664\u4ee51000\u540e\u7684\u6574\u6570\u90e8\u5206\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528DIV\u51fd\u6570\u6765\u5b9e\u73b0\u8fd9\u4e2a\u529f\u80fd\uff0c\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
SELECT employee_name, sales_amount DIV 1000 AS sales_in_thousands\nFROM employee_sales;<\/pre>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86DIV\u51fd\u6570\u6765\u5c06\u6bcf\u4f4d\u5458\u5de5\u7684\u9500\u552e\u989d\u9664\u4ee51000\u540e\u53d6\u6574\u5f97\u5230\u9500\u552e\u989d\u7684\u5343\u4f4d\u90e8\u5206\u3002<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u4ee3\u7801\u793a\u4f8b\uff0c\u6211\u4eec\u5c55\u793a\u4e86\u5728Oracle SQL\u4e2d\u5982\u4f55\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\uff0c\u5305\u62ec\u4f7f\u7528\u9664\u6cd5\u8fd0\u7b97\u7b26\uff08\/\uff09\u8fdb\u884c\u4e00\u822c\u9664\u6cd5\u8fd0\u7b97\u548c\u4f7f\u7528DIV\u51fd\u6570\u8fdb\u884c\u6574\u6570\u9664\u6cd5\u8fd0\u7b97\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u9664\u6cd5\u8fd0\u7b97\u662f\u6570\u636e\u5e93\u67e5\u8be2\u4e2d\u5e38\u89c1\u4e14\u5fc5\u8981\u7684\u8fd0\u7b97\u4e4b\u4e00\uff0c\u638c\u63e1\u597d\u9664\u6cd5\u8fd0\u7b97\u7684\u65b9\u6cd5\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u66f4\u6709\u6548\u5730\u5904\u7406\u6570\u636e\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u300a\u793a\u4f8b\uff1aOracle SQL\u4e2d\u7684\u9664\u6cd5\u8fd0\u7b97\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8eOracle,SQL,\u9664\u6cd5\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff01<\/p>\n
\n
\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u793a\u4f8b\uff1aOracle SQL\u4e2d\u7684\u9664...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-199993","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199993","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=199993"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199993\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}