{"id":91354,"date":"2024-10-18T20:31:20","date_gmt":"2024-10-18T12:31:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/91354\/"},"modified":"2024-10-18T20:31:20","modified_gmt":"2024-10-18T12:31:20","slug":"ora-30455-%e6%91%98%e8%a6%81%e5%8c%85%e5%90%ab-variance-%e8%80%8c%e6%b2%92%e6%9c%89%e7%9b%b8%e6%87%89%e7%9a%84-sum-%e5%92%8c-count-oracle-%e5%a0%b1%e9%8c%af-%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/91354\/","title":{"rendered":"ORA-30455: \u6458\u8981\u5305\u542b VARIANCE \u800c\u6c92\u6709\u76f8\u61c9\u7684 SUM \u548c COUNT ORACLE \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406"},"content":{"rendered":"<h1 id=\"ora-30455-%e6%91%98%e8%a6%81%e5%8c%85%e5%90%ab-variance-%e8%80%8c%e6%b2%92%e6%9c%89%e7%9b%b8%e6%87%89%e7%9a%84-sum-%e5%92%8c-count-oracle-%e5%a0%b1%e9%8c%af-%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9-yCrWnbqaTB\">ORA-30455: \u6458\u8981\u5305\u542b VARIANCE \u800c\u6c92\u6709\u76f8\u61c9\u7684 SUM \u548c COUNT ORACLE \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528 Oracle \u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u4fbf\u662f <code>ORA-30455<\/code>\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u4f7f\u7528\u805a\u5408\u51fd\u6578\u6642\uff0c\u7279\u5225\u662f\u7576\u4f60\u5617\u8a66\u8a08\u7b97\u8b8a\u7570\u6578\uff08<code>VARIANCE<\/code>\uff09\u800c\u6c92\u6709\u76f8\u61c9\u7684\u7e3d\u548c\uff08<code>SUM<\/code>\uff09\u548c\u8a08\u6578\uff08<code>COUNT<\/code>\uff09\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u3001\u5f71\u97ff\u4ee5\u53ca\u5982\u4f55\u9032\u884c\u6545\u969c\u4fee\u5fa9\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0-yCrWnbqaTB\">\u932f\u8aa4\u539f\u56e0<\/h2>\n<p>\u7576\u4f60\u5728 SQL \u67e5\u8a62\u4e2d\u4f7f\u7528 <code>VARIANCE<\/code> \u51fd\u6578\u6642\uff0cOracle \u6578\u64da\u5eab\u9700\u8981\u6709\u8db3\u5920\u7684\u4e0a\u4e0b\u6587\u4f86\u8a08\u7b97\u8b8a\u7570\u6578\u3002\u8b8a\u7570\u6578\u7684\u8a08\u7b97\u516c\u5f0f\u662f\u57fa\u65bc\u6578\u64da\u7684\u5e73\u5747\u503c\u548c\u6bcf\u500b\u6578\u64da\u9ede\u8207\u5e73\u5747\u503c\u7684\u5dee\u7570\u3002\u5982\u679c\u5728\u67e5\u8a62\u4e2d\u53ea\u4f7f\u7528\u4e86 <code>VARIANCE<\/code> \u800c\u6c92\u6709\u63d0\u4f9b <code>SUM<\/code> \u548c <code>COUNT<\/code>\uff0cOracle \u5c07\u7121\u6cd5\u6b63\u78ba\u8a08\u7b97\u8b8a\u7570\u6578\uff0c\u5f9e\u800c\u5f15\u767c <code>ORA-30455<\/code> \u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e7%a4%ba%e4%be%8b-yCrWnbqaTB\">\u932f\u8aa4\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u53ef\u80fd\u5f15\u767c <code>ORA-30455<\/code> \u932f\u8aa4\u7684 SQL \u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT VARIANCE(salary) \nFROM employees;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u50c5\u50c5\u4f7f\u7528\u4e86 <code>VARIANCE<\/code> \u51fd\u6578\uff0c\u6c92\u6709\u63d0\u4f9b <code>SUM<\/code> \u548c <code>COUNT<\/code>\uff0c\u56e0\u6b64\u6703\u5c0e\u81f4\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9%e6%96%b9%e6%b3%95-yCrWnbqaTB\">\u6545\u969c\u4fee\u5fa9\u65b9\u6cd5<\/h2>\n<p>\u8981\u4fee\u5fa9 <code>ORA-30455<\/code> \u932f\u8aa4\uff0c\u958b\u767c\u8005\u9700\u8981\u78ba\u4fdd\u5728\u4f7f\u7528 <code>VARIANCE<\/code> \u51fd\u6578\u6642\uff0c\u63d0\u4f9b\u5fc5\u8981\u7684\u4e0a\u4e0b\u6587\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4fee\u5fa9\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li><strong>\u6aa2\u67e5 SQL \u67e5\u8a62\uff1a<\/strong>\u78ba\u4fdd\u5728\u4f7f\u7528 <code>VARIANCE<\/code> \u6642\uff0c\u67e5\u8a62\u4e2d\u5305\u542b <code>SUM<\/code> \u548c <code>COUNT<\/code>\u3002<\/li>\n<li><strong>\u4f7f\u7528\u5b50\u67e5\u8a62\uff1a<\/strong>\u53ef\u4ee5\u901a\u904e\u5b50\u67e5\u8a62\u4f86\u8a08\u7b97\u7e3d\u548c\u548c\u8a08\u6578\uff0c\u7136\u5f8c\u518d\u8a08\u7b97\u8b8a\u7570\u6578\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ul>\n<pre><code>SELECT VARIANCE(salary) \nFROM (SELECT salary, COUNT(*) AS cnt, SUM(salary) AS total \n      FROM employees \n      GROUP BY department_id);<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u80fd\u5920\u6b63\u78ba\u8a08\u7b97\u8b8a\u7570\u6578\uff0c\u56e0\u70ba\u5b83\u63d0\u4f9b\u4e86\u5fc5\u8981\u7684\u4e0a\u4e0b\u6587\u3002<\/p>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86%e5%bb%ba%e8%ad%b0-yCrWnbqaTB\">\u9060\u7a0b\u8655\u7406\u5efa\u8b70<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u8005\u53ef\u80fd\u7121\u6cd5\u76f4\u63a5\u8a2a\u554f\u6578\u64da\u5eab\u9032\u884c\u8abf\u8a66\u3002\u9019\u6642\uff0c\u9060\u7a0b\u8655\u7406\u53ef\u4ee5\u662f\u4e00\u500b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u9060\u7a0b\u684c\u9762\u5de5\u5177\uff1a<\/strong>\u901a\u904e\u9060\u7a0b\u684c\u9762\u9023\u63a5\u5230\u6578\u64da\u5eab\u4f3a\u670d\u5668\uff0c\u76f4\u63a5\u57f7\u884c SQL \u67e5\u8a62\u4e26\u9032\u884c\u8abf\u8a66\u3002<\/li>\n<li><strong>\u65e5\u8a8c\u6a94\u6848\u5206\u6790\uff1a<\/strong>\u6aa2\u67e5 Oracle \u7684\u65e5\u8a8c\u6a94\u6848\uff0c\u5c0b\u627e\u8207 <code>ORA-30455<\/code> \u932f\u8aa4\u76f8\u95dc\u7684\u8a73\u7d30\u4fe1\u606f\u3002<\/li>\n<li><strong>\u8acb\u6c42\u6280\u8853\u652f\u6301\uff1a<\/strong>\u5982\u679c\u554f\u984c\u6301\u7e8c\u5b58\u5728\uff0c\u53ef\u4ee5\u8003\u616e\u806f\u7e6b\u6280\u8853\u652f\u6301\u5718\u968a\u4ee5\u7372\u53d6\u5e6b\u52a9\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-yCrWnbqaTB\">\u7e3d\u7d50<\/h2>\n<p>\u5728 Oracle \u6578\u64da\u5eab\u4e2d\uff0c<code>ORA-30455<\/code> \u932f\u8aa4\u901a\u5e38\u662f\u7531\u65bc\u5728\u8a08\u7b97\u8b8a\u7570\u6578\u6642\u7f3a\u5c11\u5fc5\u8981\u7684\u805a\u5408\u51fd\u6578\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5 SQL \u67e5\u8a62\u3001\u4f7f\u7528\u5b50\u67e5\u8a62\u4ee5\u53ca\u9032\u884c\u9060\u7a0b\u8655\u7406\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u7684\u4fe1\u606f\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u60a8\u7684\u6578\u64da\u5eab\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7a ORA-30455 \u932f\u8aa4\uff1a\u6458\u8981\u5305\u542b VARIANCE \u4f46\u7f3a\u5c11\u76f8\u61c9\u7684 SUM \u548c COUNT\uff0c\u63d0\u4f9b\u6545\u969c\u4fee\u5fa9\u548c\u9060\u7a0b\u8655\u7406\u65b9\u6848\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-91354","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/91354","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=91354"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/91354\/revisions"}],"predecessor-version":[{"id":91355,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/91354\/revisions\/91355"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=91354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=91354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=91354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}