Hi guys, I have two tables that supports the same data, but different table DDL (We are migrating all the data from one to another).
What I need is basically: 1. Query looks for the data on table A, 2. if it doesn't find it on table A, go look for it on table B Now, how could I do that in a Select? Can you please provide some examples? I'm using PostgreSQL 9.1. Thanks Patrick