{"id":5237,"date":"2021-03-30T15:09:17","date_gmt":"2021-03-30T07:09:17","guid":{"rendered":"https:\/\/www.gbase8.cn\/?p=5237"},"modified":"2021-05-18T10:44:19","modified_gmt":"2021-05-18T02:44:19","slug":"clickhouse-%e7%9a%84limit-by%e7%9a%84%e4%bd%bf%e7%94%a8%e4%be%8b%e5%ad%90","status":"publish","type":"post","link":"https:\/\/www.gbase8.cn\/en\/5237","title":{"rendered":"ClickHouse \u7684limit by\u7684\u4f7f\u7528\u4f8b\u5b50"},"content":{"rendered":"<p>\u5728ClickHouse\u91cc\uff0c\u589e\u52a0\u4e86\u4e00\u4e2alimit by\u90e8\u5206\uff0c\u533a\u522b\u4e8emysql\u7684limit \u5728\u6700\u7ec8\u7ed3\u679c\u96c6\u7684\u884c\u6570\u9650\u5236\uff0c\u8fd9\u4e2alimit by\u662f\u5bf9by\u5b57\u6bb5\uff0c\u6bcf\u4e2a\u503c\u4fdd\u7559\u5bf9\u5e94\u7684\u884c\u6570\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-6a2ad3e5963a1\" 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 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a2ad3e5963a1\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.gbase8.cn\/en\/5237\/#%E6%A0%B7%E4%BE%8B\" >\u6837\u4f8b<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.gbase8.cn\/en\/5237\/#%E6%95%B0%E6%8D%AE\" >\u6570\u636e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.gbase8.cn\/en\/5237\/#%E4%B8%8B%E9%9D%A2%E6%9F%A5%E8%AF%A2%EF%BC%8C%E6%AF%8F%E4%B8%AA%E7%94%9F%E6%97%A5%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E4%BA%BA\" >\u4e0b\u9762\u67e5\u8be2\uff0c\u6bcf\u4e2a\u751f\u65e5\u7684\u7b2c\u4e00\u4e2a\u4eba<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\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<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%95%B0%E6%8D%AE\"><\/span>\u6570\u636e<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u4e00\u5171\u4e09\u884c\uff0c\u5176\u4e2dbirthday\u7684\u67092\u4e2a\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase_rh7_001 :) select * from t1;\r\n\r\nSELECT *\r\nFROM t1\r\n\r\nQuery id: acdb8771-7471-4897-849c-b613b0edd194\r\n\r\n\u250c\u2500id\u2500\u252c\u2500name\u2500\u2500\u2500\u252c\u2500\u2500\u2500birthday\u2500\u2510\r\n\u2502  1 \u2502 First  \u2502 2011-01-01 \u2502\r\n\u2502  2 \u2502 Second \u2502 2012-02-02 \u2502\r\n\u2502  3 \u2502 Second \u2502 2011-01-01 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\r\n\r\n3 rows in set. Elapsed: 0.004 sec.\r\n\r\n\r\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%B8%8B%E9%9D%A2%E6%9F%A5%E8%AF%A2%EF%BC%8C%E6%AF%8F%E4%B8%AA%E7%94%9F%E6%97%A5%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E4%BA%BA\"><\/span>\u4e0b\u9762\u67e5\u8be2\uff0c\u6bcf\u4e2a\u751f\u65e5\u7684\u7b2c\u4e00\u4e2a\u4eba<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u4e5f\u5c31\u662f\uff0c\u6bcf\u4e2abirthday,\u53ea\u4fdd\u75591\u4e2a\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase_rh7_001 :) select * from t1 limit 1 by birthday;\r\n\r\nSELECT *\r\nFROM t1\r\nLIMIT 1 BY birthday\r\n\r\nQuery id: 479cc5ea-abee-4ff6-a5b6-ffb208efc730\r\n\r\n\u250c\u2500id\u2500\u252c\u2500name\u2500\u2500\u2500\u252c\u2500\u2500\u2500birthday\u2500\u2510\r\n\u2502  1 \u2502 First  \u2502 2011-01-01 \u2502\r\n\u2502  2 \u2502 Second \u2502 2012-02-02 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\r\n\r\n2 rows in set. Elapsed: 0.002 sec.\r\n\r\ngbase_rh7_001 :) select * from t1 limit 1 by birthday;<\/code><\/pre>","protected":false},"excerpt":{"rendered":"<p>\u5728ClickHouse\u91cc\uff0c\u589e\u52a0\u4e86\u4e00\u4e2alimit by\u90e8\u5206\uff0c\u533a\u522b\u4e8emysql\u7684limit \u5728\u6700\u7ec8\u7ed3\u679c\u96c6\u7684\u884c\u6570\u9650\u5236\uff0c\u8fd9\u4e2alimit by\u662f\u5bf9by\u5b57\u6bb5\uff0c\u6bcf\u4e2a\u503c\u4fdd\u7559\u5bf9\u5e94\u7684\u884c\u6570\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-5237","post","type-post","status-publish","format-standard","hentry","category-clickhouse"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5237","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=5237"}],"version-history":[{"count":2,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5237\/revisions"}],"predecessor-version":[{"id":5239,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5237\/revisions\/5239"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=5237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=5237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=5237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}