there's a large body of postgresql-specific knowledge. Don't be that guy. Yes... and the OP was very unspecific as to what exactly was the problem. Maybe he/s

there's a large body of postgresql-specific knowledge. Don't be that guy. Yes... and the OP was very unspecific as to what exactly was the problem. Maybe he/she just doesn't get SQL, I don't know. If the question was PostgreSQL specific, then that is another issue.