{"id":5212,"date":"2021-03-25T17:29:47","date_gmt":"2021-03-25T09:29:47","guid":{"rendered":"https:\/\/www.gbase8.cn\/?p=5212"},"modified":"2021-03-25T17:29:47","modified_gmt":"2021-03-25T09:29:47","slug":"gbase-8a%e5%81%9acount-distinct%e6%97%b6%e6%95%b0%e6%8d%ae%e5%88%87%e5%88%86%e7%ae%97%e6%b3%95%e5%8f%82%e6%95%b0_gbase_optimizer_aggr_distinct","status":"publish","type":"post","link":"https:\/\/www.gbase8.cn\/en\/5212","title":{"rendered":"\u5357\u5927\u901a\u7528GBase 8a\u505acount distinct\u65f6\u6570\u636e\u5207\u5206\u7b97\u6cd5\u53c2\u6570_gbase_optimizer_aggr_distinct"},"content":{"rendered":"<p>GBase 8a\u6570\u636e\u5e93\uff0c\u9488\u5bf9count distinct ,sum disticnt\u7b49\u805a\u5408 distinct\u573a\u666f\uff0c\u901a\u8fc7\u672c\u53c2\u6570_gbase_optimizer_aggr_distinct\u6307\u5b9a\u6570\u636e\u7684\u5207\u5206\u65b9\u6cd5\u3002<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Directory Navigation<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a2ad3f4b447a\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 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class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>_gbase_optimizer_aggr_distinct<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%AF%B4%E6%98%8E\"><\/span>\u8bf4\u660e<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>0\uff1a\u4e0d\u4f7f\u7528\u4f18\u5316<br>1\uff1a\u81ea\u52a8\u9002\u914d\u4f18\u5316,\u9ed8\u8ba4\u503c<br>2\uff1a\u5f3a\u5236\u4f7f\u7528\u5206\u7ec4\u4f18\u5316\uff0c\u9002\u5408\u552f\u4e00\u503c\u6bd4\u4f8b\u591a\u573a\u666f<br>3\uff1a\u5f3a\u5236\u4f7f\u7528\u5207\u5206\u4f18\u5316\uff0c\u9002\u5408\u91cd\u590d\u503c\u6bd4\u4f8b\u591a\u573a\u666f<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A0%B7%E4%BE%8B\"><\/span>\u6837\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u8be5\u53c2\u6570\u53ea\u5f71\u54cd\u8ba1\u7b97\u8282\u70b9\u672c\u5730\uff0c\u65e0\u6cd5\u4ece\u96c6\u7fa4\u6267\u884c\u8ba1\u5212\u770b\u5230\u5dee\u522b\u3002\u4f46\u53ef\u4ee5\u4ecetrc\u6267\u884c\u65e5\u5fd7\u91cc\u770b\u5230\u662fRound-Robin\u7684\u5207\u5206\u7b97\u6cd5\uff0c\u8fd8\u662fHash\u7684\u5206\u7ec4\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u9ed8\u8ba4\u7684\u81ea\u52a8\u4f18\u5316\u662f\u901a\u8fc7\u91c7\u6837\u7684\u65b9\u5f0f\uff0c\u6709\u51e0\u7387\u51fa\u73b0\u7ed3\u679c\u4e0d\u51c6\u786e\u7684\u60c5\u51b5\uff0c\u6bd4\u59821\u4e2a\u5217\uff0c\u5728DC\u5185\u57fa\u672c\u90fd\u4e0d\u4e00\u6837\uff0c\u4f46\u591a\u4e2aDC\u6709\u5927\u91cf\u91cd\u590d\u503c\u3002\u53cd\u4e4b\u4f9d\u7136\uff0cDC\u5185\u5927\u91cf\u91cd\u590d\u503c\uff0c\u4f46\u591a\u4e2aDC\u57fa\u672c\u4e0d\u540c\u3002<\/p>\n\n\n\n<p>\u53ef\u4ee5\u901a\u8fc7\u4eba\u5de5\u6307\u5b9a\u7684\u5207\u5206\u7b97\u6cd5\u3002<\/p>\n\n\n\n<p><br><\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>\u5357\u5927\u901a\u7528GBase 8a\u6570\u636e\u5e93\uff0c\u9488\u5bf9count distinct ,sum disticnt\u7b49\u805a\u5408 distinct\u573a\u666f\uff0c\u901a\u8fc7\u672c\u53c2\u6570_gbase_optimizer_aggr_distinct\u6307\u5b9a\u6570\u636e\u7684\u5207\u5206\u65b9\u6cd5\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-5212","post","type-post","status-publish","format-standard","hentry","category-gbase8a"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5212","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/comments?post=5212"}],"version-history":[{"count":6,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5212\/revisions"}],"predecessor-version":[{"id":5220,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5212\/revisions\/5220"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=5212"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=5212"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=5212"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}