Talk:Codd's theorem

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Untitled

I added a first version of this article, but over time, the discussion of domain independence will have to be extended, this may be too cryptic. Also, a discussion of range-restriction, the usual method of syntactically enforcing domain independence, should be added.

-- cdrdata —Preceding unsigned comment added by Cdrdata (talk • contribs) 09:42, 17 August 2008 (UTC)[reply]

Proof

Is it a constructive proof? I had a course in databases, and learned about Relational algebra and Datalog, which is a logic programming language, and therefore quite similar to the relational calculus. We had the transition from the RA to Datalog, which make it a constructive proof to the one-side equivalence of RA to Datalog. Galzigler (talk) 12:18, 30 November 2019 (UTC)[reply]