How to do this in Crystal Report

I have table a and table b in two database.

I made connections. Want to implement this kind of query in CR.

How can i do this using add command?. Is it possible to type in below query in add command of one database and make it work?. table a and b are in two data database connection.

select * from a
where a.id not exist
(select b.id from b where a.id = b.id)