'$times' GROUP BY user HAVI"/> '$times' GROUP BY user HAVI">
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mysql随机获取优化语句
在网上找了一个随机取数语句,结合了自己的需求,运行出错,
看了半天没发现出错的地方,求指点
<br /> $str="select * from dizhi where shijiancuo>'$times' GROUP BY user HAVING COUNT(user) > 4 AS t1 <br /> JOIN (SELECT ROUND(RAND() * (SELECT MAX(id) FROM dizhi)) AS id) AS t2 <br /> WHERE t1.id >= t2.id <br /> ORDER BY t1.id ASC LIMIT 1" ;<br /> <br /> <br /> <br />select * from