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query to average weekly data

Posted on 2008-10-31
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Last Modified: 2012-05-05
Experts,
I'm trying to create a date parameter query for a line chart that:
1) Based upon the date range create a line chart for each week ending on a Friday where it returns an average for the week. For example, a date range of 6/1/08 - 6/30/08 would return the following:
06/08/08      750
06/13/08      655
06/20/08      600
06/27/08      825
I started with this:

SELECT tblGrossStrokesPerHour.GSPHDate, tblGrossStrokesPerHour.GrossStrokesPerHour, tblGrossStrokesPerHour.LineCode
FROM tblGrossStrokesPerHour
WHERE (((tblGrossStrokesPerHour.GSPHDate) Between [Start Date] And [End Date]) AND ((tblGrossStrokesPerHour.LineCode)=8))
ORDER BY tblGrossStrokesPerHour.GSPHDate;

I attached the a database
 
gsph.zip
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Question by:Frank Freese
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2 Comments
 
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Accepted Solution

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Flyster earned 2000 total points
ID: 22853233
I didn't have time to try this on your DB. See if this works for you:

SELECT Avg(tblGrossStrokesPerHour.GrossStrokesPerHour) AS AvgOfGrossStrokesPerHour, tblGrossStrokesPerHour.LineCode, Format([GSPHDate],"ww",7) AS WeekNumber, Max([GSPHDate]) AS WeekEnding
FROM tblGrossStrokesPerHour
GROUP BY tblGrossStrokesPerHour.LineCode, Format([GSPHDate],"ww",7)
HAVING (((tblGrossStrokesPerHour.LineCode)=8) AND ((Max([GSPHDate])) Between [Start Date] And [End Date]));

Flyster
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Author Closing Comment

by:Frank Freese
ID: 31512152
You nailed it! Many thanks!!!
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