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Sure, those things aren't specified in SQL, but again -- that's a feature of SQL, not the relational model. You could just as easily have an imperative relation
by repsilat 8y ago
Sure, those things aren't specified in SQL, but again -- that's a feature of SQL, not the relational model. You could just as easily have an imperative relational language as a declarative one, so those theoretical foundations can be used to justify very little of the query language.