SQL server Database - Command based Crystal reports parameters issue

Hi,

We are migrating Oracle to SQL server database and trying to point our crystal reports  to new database.

In command based reports, the parameters are defined in the where clause like this

   (' All' in {?Country} or loc.country in {?Country} )

On modifying the report script to ANSI standard, loc.country in {?Country} gets recognized by Crystal but   'All' in {?Country} does not work.

I am pretty sure that it should be defined in a different way,but not able to figure out.

Any suggestions?

Thanks,

Nithya