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Re:For Want of a JOIN by ttfkam on Friday December 23, 2022 @01:09PM (#34108848)
Also, views are the essence of composability.

As for testing in the Postgres sphere, there's pgTAP and pg_prove. https://pgtap.org/

Extension development includes a built-in unit testing harness as well.

For use with any database, a tool like Sqitch allows for DB-agnostic verification at each migration point. https://sqitch.org/docs/manual/sqitchtutorial/#trust-but-ver...

Proprietary databases have their own solutions as well. https://learn.microsoft.com/en-us/sql/ssdt/walkthrough-creat...

I think "utter lack" is grossly misrepresenting the state of the art. If you mean "widespread ignorance of existing techniques related to composability or testability," then we are in agreement.

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