Questions tagged [relational-calculus]

For questions: (a) about one of the relational forms of predicate calculus, i.e., domain and tuple, or (b) about expressing queries on data contained in a relational database utilizing one of those forms of calculus.

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What does <> mean in Relational Calculus?

I saw a Tuple Relational Calculus formula, and it contained the symbol <> I couldn't find any reference to it anywhere - can anyone tell me what this means? (perhaps this question will be a ...