Difference between sub query and nested query ?
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Answer Posted / mohanty
query inside the query is nested query.
it is also called as sub query.
Correlated subquery runs once for each row selected by the
outer query. It contains a reference to a value from the
row selected by the outer query.
Nested subquery runs only once for the entire nesting
(outer) query. It does not contain any reference to the
outer query row.
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