How to get all row count per some characteristice

Hi expert,

         my query is:

         employee   calendar_day    compensation

            1                   2013/4/2        200

            1                   2013/4/2        1000   

            1                   2013/4/2          500

            1                   2013/5/3        1000

I want a field in query to count rows per employee, such as for employee 1, there are 4rows, not distinct rows, I need all row count per employee.

Many Thanks,