Question

Hello I have table name FriendsData that contains duplicate records as shown below

fID UserID  FriendsID       IsSpecial      CreatedBy
-----------------------------------------------------------------
1   10         11            FALSE            1
2   11          5            FALSE            1
3   10         11            FALSE            1
4    5         25            FALSE            1 
5   10         11            FALSE            1
6   12         11            FALSE            1
7   11          5            FALSE            1
8   10         11            FALSE            1
9   12         11            FALSE            1

I want to remove duplicate combinations rows using MS SQL?
Remove latest duplicate records from MS SQL FriendsData table.
here I attached image which highlights duplicate column combinations.

How I can removed all duplicate combinations from SQL table?

Answer 1

Try this

DELETE
FROM FriendsData 
WHERE fID NOT IN
(
SELECT MIN(fID)
FROM FriendsData 
GROUP BY UserID, FriendsID)

See here

Or here is more ways to do what you want

Hope this helps