我正在将SQL命令解析为mysqli查询。我想得到各种情况下的记录。我现在用union做这件事,但速度非常慢。有没有更好更有效的方法来做到这一点?$sql = "SELECT COUNT(*) as Total FROM table1 WHERE GroupId = 2 UNION ";
$sql .= "SELECT COUNT(*) asLikes FROM ta
我有一个sql查询SELECT * FROM articles where `id` =1 AND `datatime` > ='datetime1';SELECT* FROM articles where `id` =2 AND `datatime` > ='datetime2';SELECT * FROM articles where`id` =3 AND `datatime` > ='dat