SQL duplicates with different primary keys

Question

I have a table in this form:

id | firstname | lastname
---+-----------+----------
1  | alex      | marti
2  | mark      | finger
3  | alex      | marti
4  | ted          


        

Answer 1

--Remove Duplicate Rows with different ID SQL SERVER

CREATE TABLE #TempTable
(
    Id        int,
    Firstname varchar(20),
    Lastname  varchar(20)
)

INSERT INTO #TempTable( Id, Firstname, Lastname) SELECT min(Id)as Id, Firstname, Lastname 
FROM UserTable 
GROUP BY  Firstname, Lastname

delete from UserTable where Id not in(select Id from #TempTable)

drop #TempTable