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What are the type of SUB-QUERy?
There are many types of SUB-QUERY : 
> Single-row sub-query:  where the sub-query returns only one row.
> Multiple-row sub-query : where the sub-query returns multiple rows, 
and
> Multiple column sub-query : where the  Sub-query returns multiple columns.
Posted By: Name:Rajesh Kr URL: What are the type of SUB-QUERy?