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In our SQL Server Database we have at least 25-35 lookup / empty tables that are never used. Is there any negative effect for keeping them in our database (performance, storage etc)
Basically, would deleteing them have any positive impact on queries etc.
If queries don’t reference the tables, then there would be no impact to those queries. SQL Server will pay attention to frequently requested information and cache that information in memory. Having a table out there should result in no notable difference in performance or storage.