Question

I tried to select friend list with MemberID on MS SQL here is my code

    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

and the result is

MemberID    FriendID  
1           2
1           7
34          1

What should I do to change the last row to

MemberID    FriendID  
1           2
1           7
1           34

Thanks!

Answer 1

SELECT  MemberID, FriendID
FROM    Friends
WHERE   MemberID = @MemberID
UNION ALL
SELECT  FriendID, MemberID
FROM    Friends
WHERE   FriendID = @MemberID