按另一個表格列訂購表格？

Question

我有這個查詢：

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

我有另一個存儲約會的表，它有一個名為 meet 的列。

如何按滿足對此查詢進行排序？

並非用戶的所有數據都在其他表中。

Answer 1

你可以像這樣使用加入

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 2

您可以使用以下查詢。 用您的原始表名替換 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 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 ";