What are the properties of SUB-QUERY?

What are the properties of SUB-QUERY?

There are many Properties of Sub-Query are there :
> Its must be enclosed in the parenthesis.
> Its must be put in the right hand of the comparison operator.
> Its cannot contain an ORDER-BY clause.
> A query can contain more than one sub-query.

By:UMANG
Date:2010-01-09 00:00:00

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