我试图在 MS SQL 上选择带有 MemberID 的朋友列表,这是我的代码
SELECT MemberID, FriendID,(Select Username From Members Where MemberID = Friends.FriendID) as Username FROM Friends WHERE MemberID = @MemberID
UNION
SELECT MemberID as FriendID, FriendID as MemberID,(Select Username From Members Where MemberID = Friends.MemberID) as Username FROM Friends WHERE FriendID = @MemberID
结果是
MemberID FriendID
1 2
1 7
34 1
我应该怎么做才能将最后一行更改为
MemberID FriendID
1 2
1 7
1 34
谢谢!