Set operations on queries • Set theoretic: - union, intersect, except • Semantics: First eliminate duplicates, then apply set theoretic operations • Multiset operations - union all, intersect all, except all • Semantics: apply multiset operations - Study24x7
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Set operations on queries • Set theoretic: - union, intersect, except • Semantics: First eliminate duplicates, then apply set theoretic operations • Multiset operations - union all, intersect all, except all • Semantics: apply multiset operations

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