'PostgreSQL is a powerful open source relational database. It supports ACID transactions, foreign keys, and a rich type system including JSON and arrays.', 'Ada Lovelace', '2025-10-01'), ('Indexing ...

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SQL is a programming language used for interrogating a database.

-- Creates the sqlf_filtering schema and a single `person` table. -- Uses the same shape as section 09 so the mental model carries -- over, but lives in its own schema so the two sections are ...