{"id":160259,"date":"2024-11-03T21:36:18","date_gmt":"2024-11-03T13:36:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160259\/"},"modified":"2024-11-03T21:36:19","modified_gmt":"2024-11-03T13:36:19","slug":"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-stddev","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160259\/","title":{"rendered":"OceanBase \u6559\u7a0b\uff1aOceanBase STDDEV"},"content":{"rendered":"<h1 id=\"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-stddev-fWCCaiKVzM\">OceanBase \u6559\u7a0b\uff1aOceanBase STDDEV<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u6548\u7387\u5c0d\u65bc\u4f01\u696d\u7684\u6210\u529f\u81f3\u95dc\u91cd\u8981\u3002OceanBase \u4f5c\u70ba\u4e00\u6b3e\u9ad8\u6027\u80fd\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u5df2\u7d93\u5728\u8a31\u591a\u884c\u696d\u4e2d\u5f97\u5230\u4e86\u5ee3\u6cdb\u61c9\u7528\u3002\u672c\u6587\u5c07\u91cd\u9ede\u4ecb\u7d39 OceanBase \u4e2d\u7684 STDDEV \u51fd\u6578\uff0c\u5e6b\u52a9\u8b80\u8005\u7406\u89e3\u5176\u7528\u6cd5\u53ca\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-stddev-%e5%87%bd%e6%95%b8%ef%bc%9f-fWCCaiKVzM\">\u4ec0\u9ebc\u662f STDDEV \u51fd\u6578\uff1f<\/h2>\n<p>STDDEV \u51fd\u6578\u662f\u7528\u65bc\u8a08\u7b97\u4e00\u7d44\u6578\u64da\u7684\u6a19\u6e96\u5dee\u7684\u7d71\u8a08\u51fd\u6578\u3002\u6a19\u6e96\u5dee\u662f\u4e00\u7a2e\u8861\u91cf\u6578\u64da\u5206\u6563\u7a0b\u5ea6\u7684\u6307\u6a19\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u4e86\u89e3\u6578\u64da\u7684\u8b8a\u7570\u6027\u3002\u5728 OceanBase \u4e2d\uff0cSTDDEV \u51fd\u6578\u53ef\u4ee5\u7528\u65bc\u5206\u6790\u6578\u64da\u96c6\u7684\u6ce2\u52d5\u6027\uff0c\u5f9e\u800c\u70ba\u6c7a\u7b56\u63d0\u4f9b\u4f9d\u64da\u3002<\/p>\n<h2 id=\"stddev-%e5%87%bd%e6%95%b8%e7%9a%84%e8%aa%9e%e6%b3%95-fWCCaiKVzM\">STDDEV \u51fd\u6578\u7684\u8a9e\u6cd5<\/h2>\n<pre><code>STDDEV(expression)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>expression<\/code> \u662f\u8981\u8a08\u7b97\u6a19\u6e96\u5dee\u7684\u6578\u64da\u5217\u6216\u8868\u9054\u5f0f\u3002\u8a72\u51fd\u6578\u5c07\u8fd4\u56de\u4e00\u500b\u6d6e\u9ede\u6578\uff0c\u8868\u793a\u8a72\u6578\u64da\u96c6\u7684\u6a19\u6e96\u5dee\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b-fWCCaiKVzM\">\u4f7f\u7528\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 STDDEV \u51fd\u6578\u7684\u7c21\u55ae\u793a\u4f8b\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>sales<\/code> \u7684\u8868\uff0c\u8a72\u8868\u5305\u542b\u4e86\u4e0d\u540c\u7522\u54c1\u7684\u92b7\u552e\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT STDDEV(sale_amount) AS stddev_sales\nFROM sales;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de <code>sale_amount<\/code> \u5217\u7684\u6a19\u6e96\u5dee\uff0c\u5e6b\u52a9\u6211\u5011\u4e86\u89e3\u92b7\u552e\u6578\u64da\u7684\u6ce2\u52d5\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e7%b6%ad%e5%ba%a6%e5%88%86%e6%9e%90-fWCCaiKVzM\">\u591a\u7dad\u5ea6\u5206\u6790<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u6839\u64da\u4e0d\u540c\u7684\u7dad\u5ea6\u4f86\u5206\u6790\u6a19\u6e96\u5dee\u3002\u4f8b\u5982\uff0c\u6211\u5011\u53ef\u4ee5\u6839\u64da\u7522\u54c1\u985e\u5225\u4f86\u8a08\u7b97\u6bcf\u500b\u985e\u5225\u7684\u92b7\u552e\u6a19\u6e96\u5dee\uff1a<\/p>\n<pre><code>SELECT product_category, STDDEV(sale_amount) AS stddev_sales\nFROM sales\nGROUP BY product_category;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u8fd4\u56de\u6bcf\u500b\u7522\u54c1\u985e\u5225\u7684\u92b7\u552e\u6a19\u6e96\u5dee\uff0c\u5e6b\u52a9\u4f01\u696d\u8b58\u5225\u54ea\u4e9b\u985e\u5225\u7684\u92b7\u552e\u8868\u73fe\u8f03\u70ba\u7a69\u5b9a\uff0c\u54ea\u4e9b\u985e\u5225\u5247\u5b58\u5728\u8f03\u5927\u7684\u6ce2\u52d5\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-fWCCaiKVzM\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5728\u4f7f\u7528 STDDEV \u51fd\u6578\u6642\uff0c\u78ba\u4fdd\u6578\u64da\u96c6\u7684\u5b8c\u6574\u6027\uff0c\u7f3a\u5931\u503c\u53ef\u80fd\u6703\u5f71\u97ff\u8a08\u7b97\u7d50\u679c\u3002<\/li>\n<li>\u6a19\u6e96\u5dee\u7684\u8a08\u7b97\u57fa\u65bc\u6a23\u672c\u6578\u64da\uff0c\u5c0d\u65bc\u6574\u9ad4\u6578\u64da\u7684\u63a8\u65b7\u9700\u8981\u8b39\u614e\u3002<\/li>\n<li>\u5728\u8655\u7406\u5927\u6578\u64da\u96c6\u6642\uff0c\u8a08\u7b97\u6a19\u6e96\u5dee\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\uff0c\u5efa\u8b70\u5728\u5fc5\u8981\u6642\u9032\u884c\u512a\u5316\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-fWCCaiKVzM\">\u7d50\u8ad6<\/h2>\n<p>STDDEV \u51fd\u6578\u5728 OceanBase \u4e2d\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u6df1\u5165\u5206\u6790\u6578\u64da\u7684\u8b8a\u7570\u6027\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u8a72\u51fd\u6578\uff0c\u4f01\u696d\u53ef\u4ee5\u66f4\u597d\u5730\u7406\u89e3\u5176\u696d\u52d9\u904b\u71df\u72c0\u6cc1\uff0c\u5f9e\u800c\u505a\u51fa\u66f4\u660e\u667a\u7684\u6c7a\u7b56\u3002\u82e5\u60a8\u5c0d OceanBase \u6216\u5176\u4ed6\u6578\u64da\u5eab\u6280\u8853\u6709\u8208\u8da3\uff0c\u5efa\u8b70\u6df1\u5165\u5b78\u7fd2\u76f8\u95dc\u8cc7\u6599\uff0c\u4e26\u5728\u5be6\u969b\u9805\u76ee\u4e2d\u9032\u884c\u61c9\u7528\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u53ca\u5176\u61c9\u7528\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how to use OceanBase STDDEV for statistical analysis in your database. Enhance your data insights with our comprehensive tutorial.<\/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-160259","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160259","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=160259"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160259\/revisions"}],"predecessor-version":[{"id":160260,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160259\/revisions\/160260"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}