Crystal Reports Group By and MySQL mediumtext field

Hello Friends,

I have connected Crystal Reports to MySQL database 4.x.
Now I want to run a query using the group by option on a mediumtext data type field. But as Crystal Reports does not allow to do a Group by on a mediumtext field is there any way i can convert the field to String and then do a group by ?

Thanks for your help in advance.
Shanker.Do you have unique id value for that column?
If so group by itsql