Thanks MalcolmW, but sorry I don't quite understand what you meant. What I have done is:<br><br>1. I linked up 2 tables with their IDs, {A.ID} and {B.ID}<br>2. I make a group for {A.ID}<br>3. Do the count on {B.ID} inside each {A.ID} Group<br><br><br>How can I get the SUM of the above count on {B.ID}?<br><br>I apologize for the oversimplified statement in the last post.<br><br>>Yuenie <br> <br><br><br>