Delete duplicate records in SQL Server?

You can do this with window functions. It will order the dupes by empId, and delete all but the first one.

delete x from (
  select *, rn=row_number() over (partition by EmployeeName order by empId)
  from Employee 
) x
where rn > 1;

Run it as a select to see what would be deleted:

select *
from (
  select *, rn=row_number() over (partition by EmployeeName order by empId)
  from Employee 
) x
where rn > 1;

http://stackoverflow.com/questions/3317433/delete-duplicate-records-in-sql-server