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Explain UNION,MINUS,UNION ALL, INTERSECT ?

explain intersect minus Union
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Explain UNION,MINUS,UNION ALL, INTERSECT ?

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INTERSECT returns all distinct rows selected by both queries.MINUS – returns all distinct rows selected by the first query but not by the second.UNION – returns all distinct rows selected by either queryUNION ALL – returns all rows selected by either query, including all duplicates.

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