what is the use of sub queriesa sub query is a
What is the use of sub queries?
A sub query is a select-from-where expression that is nested with in another query. A common use of sub queries is to do tests for set membership, make set comparisions, and verify set cardinality.
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what is the use of sub queriesa sub query is a select-from-where expression that is nested with in another query a common use of sub queries is to do
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