What is a subquery?

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answerhappygod
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What is a subquery?

Post by answerhappygod »

a) A subquery is a select-from-where expression that is nested within another query
b) A subquery is any query that is nested within another query
c) A subquery is a relation that is externally specified which can be used to handle data in queries
d) A subquery is a condition that excludes all the invalid tuples from the database
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