Getting error while calculating the average in Transact-sql

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I have to calculate the average but i keep on getting this error :

Cannot perform an aggregate function on an expression containing an aggregate or a subquery.

SQL

select fa.new_contractid,AVG(Sum(vews.TransactionCount)) as BillableUsage from BingMapsPlatform_Staging.dbo.VEWSDailyAggTrans vews
inner join BingMapsPlatform_MSCRM.dbo.FilteredAccount fa
on fa.new_accountid=vews.PrimaryId
where fa.new_contractid = '6145412166'
group by fa.new_contractid

How should i modify the script to get the average.

Posted 11-Dec-12 1:55am

PRASHANT KUMAR LAL

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2 solutions

Solution 1

Try this

SQL

select fa.new_contractid,AVG(Sum(vews.TransactionCount)) as BillableUsage from BingMapsPlatform_Staging.dbo.VEWSDailyAggTrans vews,BingMapsPlatform_MSCRM.dbo.FilteredAccount fa
where fa.new_accountid=vews.PrimaryId
and fa.new_contractid = '6145412166'
group by fa.new_contractid

Posted 11-Dec-12 2:11am

nagalkumar

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sisir patro · Accepted Answer · 2012-12-11T04:28:00

Hi Prasant,

try this

SQL

select fa.new_contractid,AVG(Summation) as BillableUsage from(select Sum(vews.TransactionCount) as Summation from BingMapsPlatform_Staging.dbo.VEWSDailyAggTrans) vews
inner join BingMapsPlatform_MSCRM.dbo.FilteredAccount fa
on fa.new_accountid = vews.PrimaryId
where fa.new_contractid = '6145412166'
group by fa.new_contractid

SQL

Thanks