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Query Date Field

Posted on 2014-01-19
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Last Modified: 2014-01-20
I am trying to run a query from a query that has a list of dates. I want it only for the current day and it is not reading the WHERE properly, it pull up zero results. Below I have the query that pulls up zero result. This same query without the HAVING section works fine. I feel like the column isn't being read properly as a "date". Is there something I have to do to format that?

SELECT qryStatsforDailySalesReport.DateField, qryStatsforDailySalesReport.MessagesRecorded, qryStatsforDailySalesReport.TotalNewClients, qryStatsforDailySalesReport.BookedTrue, qryStatsforDailySalesReport.TalkedTo, qryStatsforDailySalesReport.PercentBooked, qryStatsforDailySalesReport.FiveMinCallBack, qryStatsforDailySalesReport.PercentinFive, qryStatsforDailySalesReport.AvgOfSumOfExtendedPrice, "CurrentDay" AS DateSpec
FROM qryStatsforDailySalesReport
GROUP BY qryStatsforDailySalesReport.DateField, qryStatsforDailySalesReport.MessagesRecorded, qryStatsforDailySalesReport.TotalNewClients, qryStatsforDailySalesReport.BookedTrue, qryStatsforDailySalesReport.TalkedTo, qryStatsforDailySalesReport.PercentBooked, qryStatsforDailySalesReport.FiveMinCallBack, qryStatsforDailySalesReport.PercentinFive, qryStatsforDailySalesReport.AvgOfSumOfExtendedPrice, "CurrentDay"
HAVING (((qryStatsforDailySalesReport.DateField)=Date()));
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Question by:cansevin
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Expert Comment

by:Jim P.
ID: 39792234
Try this:
SELECT qryStatsforDailySalesReport.DateField, qryStatsforDailySalesReport.MessagesRecorded, qryStatsforDailySalesReport.TotalNewClients, qryStatsforDailySalesReport.BookedTrue, qryStatsforDailySalesReport.TalkedTo, qryStatsforDailySalesReport.PercentBooked, qryStatsforDailySalesReport.FiveMinCallBack, qryStatsforDailySalesReport.PercentinFive, qryStatsforDailySalesReport.AvgOfSumOfExtendedPrice, "CurrentDay" AS DateSpec
FROM qryStatsforDailySalesReport
WHERE DateValue(qryStatsforDailySalesReport.DateField)=DateValue(Now())
GROUP BY qryStatsforDailySalesReport.DateField, qryStatsforDailySalesReport.MessagesRecorded, qryStatsforDailySalesReport.TotalNewClients, qryStatsforDailySalesReport.BookedTrue, qryStatsforDailySalesReport.TalkedTo, qryStatsforDailySalesReport.PercentBooked, qryStatsforDailySalesReport.FiveMinCallBack, qryStatsforDailySalesReport.PercentinFive, qryStatsforDailySalesReport.AvgOfSumOfExtendedPrice, "CurrentDay"

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Author Comment

by:cansevin
ID: 39792237
Unfortunately still not working
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Accepted Solution

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Jim P. earned 500 total points
ID: 39792288
Change the WHERE clause to:
WHERE DateValue(Nz(qryStatsforDailySalesReport.DateField,#1/1/1950#))=DateValue(Now())

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Expert Comment

by:Jim Horn
ID: 39792314
>I feel like the column isn't being read properly as a "date".
By any chance is column DateField a Text field, which you are applying date logic to?
If yes, what would happen if the column has a non-date value, such as blank, NULL, "banana"?
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Expert Comment

by:Gustav Brock
ID: 39792507
You probably have both date and time. Try removing time:

HAVING Int(qryStatsforDailySalesReport.DateField)=Date();

or (faster if DateField is indexed):

HAVING qryStatsforDailySalesReport.DateField Between Date() And Date() + TimeSerial(23,11,59);

/gustav
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Expert Comment

by:Helen_Feddema
ID: 39792963
What data type is the DateField field?  If it isn't a Date field, you might need to convert its value to a Date variable, using CDate(), maybe after checking that the value in the field can be converted to a Date, using IsDate().  Here is some sample code that checks the value in a form control:

If IsDate(Me![txtFromDate].Value) = True Then
   dteFromDate = CDate(Me![txtFromDate].Value)
End If

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Expert Comment

by:PatHartman
ID: 39792964
You can also use the DateValue() function to extract just the date from a datetime field.

Where DateTime(YourDate) = Date();

I would switch the Having to a Where.  Where is evaluated BEFORE aggregation and Having is evaluated AFTER aggregation.  Since the date isn't going to be affected by the Group By, it is more efficient to get rid of the data you don't need before you make the query engine go through the process of aggregating it.  Having is only used when your criteria doesn't actually exist in the Select clause.
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Expert Comment

by:Jim P.
ID: 39792998
I would switch the Having to a Where.

Uh, Pat,  did you happen to look at my query here?
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Expert Comment

by:PatHartman
ID: 39793033
I see it now.  I generally don't look at posts that just say "try this" without any explanation of what/why.  

Why use DateValue(Now()) rather than a simple Date()?
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Expert Comment

by:Jim P.
ID: 39793049
Why use DateValue(Now()) rather than a simple Date()?

I have been bitten more than once where bad reference orders, localities, Win setup, VBA, etc. have given a syntax error or misinterpretation of what you are trying to do. But the Now() is more specific and the stripping back to the date only adds probably a 1/2MS to processing.
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Expert Comment

by:Gustav Brock
ID: 39793488
> Why use DateValue(Now()) rather than a simple Date()?

There is no reason. It adds nothing and is marginally slower.

Jim, it will only obfuscate code as any other developer who would happen to maintain the code will ask as Pat: Why did he do this?
As to the issue with references, troubles with Date() and Left() and other very basic functions are only symptoms, never the cause.

/gustav
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Author Closing Comment

by:cansevin
ID: 39794057
Thanks! That was the one that worked! Have a great day
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