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Both Cascalog and Datomic have chosen to use Datalog (over SQL) as their query engine.

Dave Thomas made the claim:

Datalog is better than SQL for large queries in small amounts of space.

My question is: Is datalog more efficient than SQL for column oriented databases?

hawkeye
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    Datalog is not an engine. It's a language for expressing a query. How efficient it is at expressing a query bears *no* relationship to how fast an engine might be at executing that query. – cliffordheath Jan 29 '19 at 06:39

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