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SQL excels at data processing. It's not only a query DSL but also has INSERT, UPDATE, etc., making up a practical batch processing language with natural lock semantics, rollback, etc. SQL also pretty much enshrines a strict DDL/DML separation, has privileges and roles, and so on.

Prolog, OTOH, excels at planning, optimization, constraint solving, etc. Given Prolog was originally designed for old-school grammar/logic-based NLP, it also has excellent built-in support for custom DSLs and recursive-descent parsing using definite clause grammars making use of Prolog's logical variables (with indeterminism / backtracking and retry) and unification (pattern matching on steroids).

Check out Prolog in-browser demos for robotic planning/container logistics and machine learning/bioinformatics (not based on LLMs) at [1]. These aren't problems you'd tackle with SQL ;) but beyond SQL's inappropriateness also require actual language support for debugging, packages, testing, integration, etc.

[1]: https://quantumprolog.sgml.io



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