row with minimum value of a column

Question

Having this selection:

id IDSLOT  N_UM
------------------------
1  1  6
2  6  2
3  2  1
4  4  1
5  5  1
6  8  1
7  3  1
8  7  1
9  9  1
10  10  0
         


        

Answer 1

select TOP 1  Col , COUNT(Col) as minCol from employee GROUP by Col
order by mindep  asc