{"id":49,"date":"2022-01-27T15:34:07","date_gmt":"2022-01-27T07:34:07","guid":{"rendered":"https:\/\/cnizn.cn\/?p=49"},"modified":"2022-01-27T15:34:07","modified_gmt":"2022-01-27T07:34:07","slug":"mysql%e5%ae%9e%e7%8e%b0%e9%9a%8f%e6%9c%ba%e8%8e%b7%e5%8f%96%e5%87%a0%e6%9d%a1%e6%95%b0%e6%8d%ae%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/cnizn.cn\/?p=49","title":{"rendered":"mysql\u5b9e\u73b0\u968f\u673a\u83b7\u53d6\u51e0\u6761\u6570\u636e\u7684\u65b9\u6cd5"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>1\uff1aSELECT * FROM tablename ORDER BY RAND() LIMIT \u60f3\u8981\u83b7\u53d6\u7684\u6570\u636e\u6761\u6570\uff1b\r\n \r\n2\uff1aSELECT *FROM `table` WHERE id >= (SELECT FLOOR( MAX(id) * RAND()) FROM `table` ) ORDER BY id LIMIT \u60f3\u8981\u83b7\u53d6\u7684\u6570\u636e\u6761\u6570;\r\n \r\n3\uff1aSELECT * FROM `table`  AS t1 JOIN (SELECT ROUND(RAND() * (SELECT MAX(id) FROM `table`)) AS id) AS t2 WHERE t1.id >= t2.id\r\nORDER BY t1.id ASC LIMIT \u60f3\u8981\u83b7\u53d6\u7684\u6570\u636e\u6761\u6570;\r\n \r\n4\uff1aSELECT * FROM `table`WHERE id >= (SELECT floor(RAND() * (SELECT MAX(id) FROM `table`))) ORDER BY id LIMIT \u60f3\u8981\u83b7\u53d6\u7684\u6570\u636e\u6761\u6570;\r\n \r\n5\uff1aSELECT * FROM `table` WHERE id >= (SELECT floor( RAND() * ((SELECT MAX(id) FROM `table`)-(SELECT MIN(id) FROM `table`)) + (SELECT MIN(id) FROM `table`))) ORDER BY id LIMIT \u60f3\u8981\u83b7\u53d6\u7684\u6570\u636e\u6761\u6570;\r\n \r\n6\uff1aSELECT * FROM `table` AS t1 JOIN (SELECT ROUND(RAND() * ((SELECT MAX(id) FROM `table`)-(SELECT MIN(id) FROM `table`))+(SELECT MIN(id) FROM `table`)) AS id) AS t2 WHERE t1.id >= t2.id ORDER BY t1.id LIMIT \u60f3\u8981\u83b7\u53d6\u7684\u6570\u636e\u6761\u6570;<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[5],"tags":[],"_links":{"self":[{"href":"https:\/\/cnizn.cn\/index.php?rest_route=\/wp\/v2\/posts\/49"}],"collection":[{"href":"https:\/\/cnizn.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cnizn.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cnizn.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cnizn.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=49"}],"version-history":[{"count":1,"href":"https:\/\/cnizn.cn\/index.php?rest_route=\/wp\/v2\/posts\/49\/revisions"}],"predecessor-version":[{"id":50,"href":"https:\/\/cnizn.cn\/index.php?rest_route=\/wp\/v2\/posts\/49\/revisions\/50"}],"wp:attachment":[{"href":"https:\/\/cnizn.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=49"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cnizn.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=49"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cnizn.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=49"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}