Would a book for Oracle's Pl/SQL be relevent to Postgres programming? I know one can pickup a T-SQL book and most will apply to Sybase and SQL Server. Does the same apply with Oracle and Postgres? (Or ...

I have a somewhat challenging SQL insert I need to accomplish in Oracle. The schema set up is not mine and it is a little weird. Here's a schema break down: agent_id feed_id subscribed 100 1 Y 100 2 N ...