Question

我已经写了一个查询，其中我正在检查用户是否将其隐私设置为每个人都将返回该结果，如果用户设置为网络，那么在我的情况下，当前用户5将检查用户是否必须是他的朋友或朋友朋友，如果它设置为朋友，那么用户应该是他的朋友：

我尝试此查询，但问题是它给出了错误：

＃1241 - 操作数应包含1列

有没有办法以不同的方式编写此查询并获得适当的结果。

SELECT `U`.`UserGUID`, `U`.`FirstName`, `U`.`LastName`
    FROM (`Users` U)
    LEFT JOIN `UserPrivacy` UP ON `UP`.`UserID`=`U`.`UserID`
    WHERE `UP`.`PrivacyLabelKey` =  'group_invite'
    AND 
     IF(UP.Value='everyone',true,'')
     OR
     (UP.Value='network',U.UserID IN(SELECT F2.FriendID FROM Friends F JOIN Friends F2 ON F.FriendID = F2
    .UserID WHERE F.UserID = 5 AND F2.Status='1' AND F.Status='1' GROUP BY F2.FriendID),'')
     OR
     (UP.Value='friend',U.UserID IN(SELECT FriendID FROM Friends WHERE UserID=5 AND Status=1),'')

    AND U.UserID!=5
    GROUP BY `U`.`UserID`

Answer 1

试试这个：

SELECT `U`.`UserGUID`, `U`.`FirstName`, `U`.`LastName`
    FROM (`Users` U)
    LEFT JOIN `UserPrivacy` UP ON `UP`.`UserID`=`U`.`UserID`
    WHERE `UP`.`PrivacyLabelKey` =  'group_invite'
    AND 
    IF(UP.Value='everyone',true, IF(UP.Value='network', U.UserID IN(SELECT F2.FriendID FROM Friends F JOIN Friends F2 ON F.FriendID = F2
    .UserID WHERE F.UserID = 5 AND F2.Status='1' AND F.Status='1' GROUP BY F2.FriendID), if(UP.Value='everyone',U.UserID IN(SELECT FriendID FROM Friends WHERE UserID=5 AND Status=1),'')))

    AND U.UserID!=5
    GROUP BY `U`.`UserID`

检查隐私并在单个查询中根据它获取用户

1 个答案: