按另一個表列排序表？

Question

我有這個疑問：

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

我有一個存儲約會另一個表，它有一個名爲列相遇。

如何通過見面對此查詢進行排序？

並非用戶的所有數據都在其他表中。

Answer 1

加入這個你可以使用下面的查詢。與原始表名稱替換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 ";