{"id":199998,"date":"2025-05-06T10:11:53","date_gmt":"2025-05-06T02:11:53","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199998\/"},"modified":"2025-05-06T10:11:53","modified_gmt":"2025-05-06T02:11:53","slug":"%e5%9c%a8oracle-sql%e4%b8%ad%e5%a6%82%e4%bd%95%e6%89%a7%e8%a1%8c%e9%99%a4%e6%b3%95%e8%bf%90%e7%ae%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199998\/","title":{"rendered":"\u5728Oracle SQL\u4e2d\u5982\u4f55\u6267\u884c\u9664\u6cd5\u8fd0\u7b97"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u5728Oracle SQL\u4e2d\u5982\u4f55\u6267\u884c\u9664\u6cd5\u8fd0\u7b97<\/h1>\n<p>\u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300a\u5728Oracle SQL\u4e2d\u5982\u4f55\u6267\u884c\u9664\u6cd5\u8fd0\u7b97\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002<\/p>\n<p>\u6807\u9898\uff1aOracle SQL \u4e2d\u7684\u9664\u6cd5\u8fd0\u7b97\u53ca\u4ee3\u7801\u793a\u4f8b<\/p>\n<p>\u5728Oracle SQL \u4e2d\uff0c\u9664\u6cd5\u8fd0\u7b97\u4f7f\u7528\u7684\u662f\u9664\u53f7\uff08\/\uff09\u7b26\u53f7\u6765\u5b9e\u73b0\u3002\u9664\u6cd5\u64cd\u4f5c\u901a\u5e38\u7528\u4e8e\u5c06\u4e00\u4e2a\u6570\u9664\u4ee5\u53e6\u4e00\u4e2a\u6570\uff0c\u5e76\u5f97\u5230\u5176\u5546\u6216\u8005\u5c0f\u6570\u7ed3\u679c\u3002\u5728\u4e0b\u9762\u7684\u6587\u7ae0\u4e2d\uff0c\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728Oracle SQL \u4e2d\u8fdb\u884c\u9664\u6cd5\u64cd\u4f5c\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<h3>1. \u4f7f\u7528\u9664\u53f7\uff08\/\uff09\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97<\/h3>\n<p>\u5728Oracle SQL \u4e2d\uff0c\u4f7f\u7528\u9664\u53f7\uff08\/\uff09\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\u5f88\u7b80\u5355\u3002\u53ea\u9700\u8981\u5c06\u88ab\u9664\u6570\u653e\u5728\u9664\u53f7\u5de6\u8fb9\uff0c\u9664\u6570\u653e\u5728\u9664\u53f7\u53f3\u8fb9\u5373\u53ef\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u9664\u6cd5\u793a\u4f8b\uff1a<\/p>\n<pre>SELECT 10 \/ 3 AS result\nFROM dual;<\/pre>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5c0610\u9664\u4ee53\uff0c\u5f97\u5230\u7684\u7ed3\u679c\u5c06\u4f1a\u662f3\uff08\u6574\u6570\u76f8\u9664\u4f1a\u88ab\u53d6\u6574\uff09\u3002<\/p>\n<h3>2. \u4f7f\u7528 ROUND \u51fd\u6570\u63a7\u5236\u9664\u6cd5\u7684\u5c0f\u6570\u4f4d\u6570<\/h3>\n<p>\u5982\u679c\u6211\u4eec\u60f3\u8981\u5f97\u5230\u9664\u6cd5\u7684\u5c0f\u6570\u7ed3\u679c\uff0c\u5e76\u4e14\u63a7\u5236\u5c0f\u6570\u4f4d\u6570\u7684\u7cbe\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528 Oracle \u63d0\u4f9b\u7684 ROUND \u51fd\u6570\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<pre>SELECT ROUND(10 \/ 3, 2) AS result\nFROM dual;<\/pre>\n<p>\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5c0610\u9664\u4ee53\uff0c\u5e76\u5c06\u7ed3\u679c\u56db\u820d\u4e94\u5165\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\u3002\u6700\u7ec8\u7ed3\u679c\u5c06\u662f3.33\u3002<\/p>\n<h3>3. \u5904\u7406\u9664\u6570\u4e3a\u96f6\u7684\u60c5\u51b5<\/h3>\n<p>\u5728\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\u65f6\uff0c\u8981\u7279\u522b\u6ce8\u610f\u9664\u6570\u4e3a\u96f6\u7684\u60c5\u51b5\u3002\u5f53\u9664\u6570\u4e3a\u96f6\u65f6\uff0cOracle SQL \u4f1a\u629b\u51fa\u9519\u8bef\u5e76\u505c\u6b62\u6267\u884c\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u52a0\u5165\u903b\u8f91\u5224\u65ad\uff0c\u6216\u8005\u4f7f\u7528NVL \u51fd\u6570\u7b49\u3002<\/p>\n<pre>SELECT \n    CASE\n        WHEN divisor = 0 THEN '\u9664\u6570\u4e0d\u80fd\u4e3a\u96f6'\n        ELSE dividend \/ NVL(divisor, 1)\n    END AS result\nFROM \n    table_name;<\/pre>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5bf9\u9664\u6570\u4e3a\u96f6\u7684\u60c5\u51b5\u8fdb\u884c\u4e86\u5224\u65ad\uff0c\u82e5\u9664\u6570\u4e3a\u96f6\uff0c\u5219\u8fd4\u56de\u9519\u8bef\u63d0\u793a\uff1b\u5426\u5219\u8fdb\u884c\u9664\u6cd5\u64cd\u4f5c\u5e76\u5f97\u5230\u7ed3\u679c\u3002<\/p>\n<h3>\u7ed3\u8bed<\/h3>\n<p>\u5728 Oracle SQL \u4e2d\u8fdb\u884c\u9664\u6cd5\u64cd\u4f5c\u662f\u975e\u5e38\u5e38\u89c1\u7684\u9700\u6c42\uff0c\u901a\u8fc7\u7b80\u5355\u4f7f\u7528\u9664\u53f7\uff08\/\uff09\u6216\u8005\u914d\u5408\u76f8\u5173\u51fd\u6570\u8fdb\u884c\u8fd0\u7b97\uff0c\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\u9664\u6cd5\u64cd\u4f5c\u5e76\u63a7\u5236\u7ed3\u679c\u7684\u7cbe\u5ea6\u3002\u540c\u65f6\uff0c\u4e3a\u4e86\u907f\u514d\u51fa\u73b0\u9664\u6570\u4e3a\u96f6\u7684\u60c5\u51b5\uff0c\u5efa\u8bae\u5728\u4ee3\u7801\u4e2d\u52a0\u5165\u903b\u8f91\u5224\u65ad\uff0c\u786e\u4fdd\u8fd0\u7b97\u7684\u987a\u5229\u8fdb\u884c\u3002<\/p>\n<p>\u5e0c\u671b\u672c\u6587\u7684\u4ecb\u7ecd\u80fd\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5728 Oracle SQL \u4e2d\u8fdb\u884c\u9664\u6cd5\u8fd0\u7b97\u3002\u795d\u5927\u5bb6\u5b66\u4e60\u8fdb\u6b65\uff01<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u300a\u5728Oracle SQL\u4e2d\u5982\u4f55\u6267\u884c\u9664\u6cd5\u8fd0\u7b97\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u9664\u6cd5\u64cd\u4f5c,\u5206\u5272\u6570\u636e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Oracle SQL\u4e2d\u5982\u4f55\u6267\u884c&#46;&#46;&#46;<\/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-199998","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199998","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=199998"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199998\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199998"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199998"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199998"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}