In regards to your question about doing a combined query, there is a module that might help you. It's called Genezzo. You can directly create or manipulate database tables with it. It's simple and can be done from the command-line.

See:

Genezzo

In reply to Re: Combined SQL Queries (e.g., EXCEPT) and DBIx::Class by Khen1950fx
in thread Combined SQL Queries (e.g., EXCEPT) and DBIx::Class by jgallagher

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