[AccessD] I need a better way to do this - looping

Kaup, Chester Chester_Kaup at kindermorgan.com
Wed Jan 2 13:30:39 CST 2008


I don't think this will work because I only need to count the number of
records between the last record and the first record (date descending)
where the measurement is greater than 100. There may records further
down in the table that are also above 100 but there are records below
100 between these and the first group. For example

12/31/2007		145
12/30/2007		175
12/29/2007		207
12/28/2007		123
12/27/2007		114
12/26/2007		90
12/25/2007		45
12/24/2007		73
12/23/2007		304

The correct answer in this case would be 5


-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Hale, Jim
Sent: Wednesday, January 02, 2008 1:19 PM
To: Access Developers discussion and problem solving
Subject: Re: [AccessD] I need a better way to do this - looping


Couldn't you use a groupby query- something like
SELECT Count(tblWellData.[fldMeasure date]) AS [CountOffldMeasure date]
FROM tblWellData
WHERE (((tblWellData.fldWellNo)=1) AND ((tblWellData.fldMeasure)<100));

For well 1 this gives you the number of records where the measurement is
<100

HTH
Jim Hale

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Kaup, Chester
Sent: Wednesday, January 02, 2008 12:35 PM
To: Access Developers discussion and problem solving
Subject: Re: [AccessD] I need a better way to do this - looping

Let me try to explain what I am trying to calculate. Myds.Fields(4) is a
pressure variance measurement on an oilfield injection well. It should
always be below 100. The goal is to count the number of records (date
descending) from the most recent to the first one where Myds1.Fields(4)
is less than 100 for each well. The number of records per well varies.
If all the records for a well have Myds.fields(4) with a value above 100
the correct answer is the number of records for the well. If record 11
descending from the most recent is less than 100 then the correct answer
would be 10. Hope this makes sense. 


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