A better discription, I hope : )

I need help with an outlook 07 sql query please!!!

There is a field in outlook 07 contacts called "Case Number" it is 12 characters in length. It can be any number of combinations containing both alpha or numeric values but always 12 characters in length. I need to query out all that begin as a specific set, or a query based on the whole 12 character set.

I thought a sql query containing a value for each character i.e. ?char1=A? would work, something staff could modify the value in, an sql query.

Is there anybody out there that can help please!!!