[AccessD] Count Average in Query

Try 
Select YearMonth, 
       WellId, 
       Count(WellPressureRecords) Recnt, 
       Sum(CasePressure)  PressureAmt
       AVG(sum(CasePressure) / Count(wellPressureRecords)) AvgPressure
>From YourTable
Where  AVG(sum(CasePressure) / Count(wellPressureRecords)) > 1000
Group by YearMonth, WellId


Otherwise may have to do subquery or two queries linked
Let me know how this goes

HTH
**************************************************
* Patricia O'Connor    
* Information Technology Specialist 3 (Programming) 
* OTDA - BDMA
* (W) mailto:Patricia.O'Connor at otda.state.ny.us
* (w) mailto:aa1160 at nysemail.state.ny.us
**************************************************
 

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-----Original Message-----

> From: accessd-bounces at databaseadvisors.com 
> [mailto:accessd-bounces at databaseadvisors.com] On Behalf Of 
> Kaup, Chester
> Sent: Friday, March 28, 2008 10:48 AM
> To: Access Developers discussion and problem solving
> Subject: [AccessD] Count Average in Query
> 
> I have a table that has casing pressures for hundreds of 
> wells. There can be anywhere from 1 to 31 values per well per 
> month. What I need to extract from the table is a count by 
> month of wells that have an average casing pressure over 1000 
> psi. I am not quite sure how do this best. I could calculate 
> a monthly average for each well, then extract the ones over 
> 1000 and then count them. This just doesn't seem like the 
> best way to go. Thanks.
> 
>  
> 
> Chester Kaup
> 
> Engineering Technician
> 
> Kinder Morgan CO2 Company, LLP
> 
> Office (432) 688-3797
> 
> FAX (432) 688-3799
> 
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