I have an employee table. I need to find and delete all the records that
have the ssn and taxyear records duplicated. For example:

rec name ssn taxyear
--- ---- --- -------
1 John Doe 111-11-1111 1999
2 John Doe 111-11-1111 2000
3 John Doe 111-11-1111 1999

I need to find and delete record number 3.
Can anyone help? Thanks!