Fun and interesting error today. Here’s the actual error text:

Error 2: this form of correlated query is not supported – consider rewriting

I’d never heard of this “correlated query” business before so I had to look it up to sort out what was going on. Turns out that you can reference a table in the outside part of a query from within a subquery by calling the alias… Or, rather, you can’t in Netezza.

Tip of the day:

Check for alias references in your subquery and get rid of them Continue reading