select is not valid at this

PHP using mysql_select_db:接收到 is not a valid MySQL-Link resource“错误.MySQL工作台,如何修复 SELECT is not valid at this position for this server version“错误...cloud.tencent.com

我最初使用的是这个查询,它工作得很好,但是速度非常慢,因为它在内部连接中有一个select。.关注问题社区首页问答首页MySQL工作台,如何修复 SELECT is not valid at this position for this serve...cloud.tencent.comTIME.rfTime = +new Date;