按另一个表列排序表？

Question

我有这个疑问：

$q = "SELECT * FROM user 
WHERE sec='1' AND reg_by='".$_SESSION['login_username']."' 
ORDER BY date DESC LIMIT $startrow, 30 "; 

我有一个存储约会另一个表，它有一个名为列相遇。

如何通过见面对此查询进行排序？

并非用户的所有数据都在其他表中。

Answer 1

加入这个你可以使用下面的查询。与原始表名称替换another_table：

$q = "SELECT u.* FROM user AS u LEFT JOIN another_table AS at ON u.userid = at.userid WHERE u.sec='1' AND u.reg_by='".$_SESSION['login_username']."' ORDER BY at.meet DESC LIMIT $startrow, 30 "; 

Answer 2

您可以像使用

select user.*,meet.* from user left join meet on (meet.userid = user.id) where user.sec='1' AND user.reg_by='".$_SESSION['login_username']."' order by meet.userid DESC 

Answer 3

$q = "SELECT * FROM user INNER JOIN user 
ON meets.userid=user.userid WHERE sec='1' AND reg_by='".$_SESSION['login_username']."' ORDER BY date DESC LIMIT $startrow, 30 ";