Thanks!
But, since the master can contain many users (user2, user3, and so on)
I suppose this won't be a proper solution?
Sorry if I was a bit unclear in my description.
I.e., the master is of the form:
user_id date
User1 20010101
User1 20000101
User1 19990101
User1 19970101
User2 ...
...
Btw, I'm using Postgre version 8.2 and I cannot use subqueries do the
GP software.
