MIn and Max or Range

Question

Hi,

 

I have a table in SQL like so

 

UId	Class
1	Apple
2	Apple
3	Apple
3a	Apple
4	Orange
4a	Orange
4b	Orange
5	Orange

 

I am trying to get the min and max of the UId column for each class. Is it possible to do so, as the UId is varchar.

 

Thanks