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What is an Aggregate Function?
Aggregation Function is basically a type of function, which is use for the calculation on the set of values and It is also return the single value , Its also have a HAVING CLAUSE, Which is used along with GROUP BY.for filtering query using aggregate values, Its ignore NULL Values excpt COUNT Function, Its have a many functions which is there :
> AVG 
> MIN
> CHECKSUM_AGG 
> SUM 
> COUNT 
> STDEV 
> COUNT_BIG 
> STDEVP 
> GROUPING 
> VAR 
> MAX 
> VARP
Posted By: Name:Rajesh Kr URL: What is an Aggregate Function?