Averaging Date/time Fields With A Query

Apr 15, 2008

I have a table in which each record includes a field showing the time that an event started and then another field which stores "how long did it take", these two fields are both defined as a short Time. I then have a query that runs through the "how long did it take" fields to produce an average time for the whole sequence of events. Two problems:

1. The average comes out as a decimal like 39553.367942 instead of several hours and minutes.

2. When I try to access this value using DLookup on a form I get "#error"

Any suggestions?

thanks

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Mar 13, 2014

I have a database with date and time each stored in a separate field. Now I want to query the database based on a start date/time and an end date/time. I started with the code below but it only returns events within the same time range on each day when what I really need is every event from a specified date and time through a specified date and time.

SELECT myTable.ID AS myTable_ID, myDate, myTime, FirstName, LastName
FROM Staff INNER JOIN myTable ON
Staff.ID = myTable.StaffID
WHERE myTable.myDate >= #3/2/2014#
AND myTable.myDate <= #3/3/2014#
AND myTable.myTime >= #8:00PM#
AND myTable.myTime <= #11:00PM#
ORDER BY myDate desc

In the above example what I want is every event from 3/2/2014 8:00PM until 3/3/2014 11:00PM. But what I get instead is every event between 8:00PM and 11:00PM on 3/2/2014 and every event between 8:00PM and 11:00PM on 3/3/2014.

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Feb 5, 2015

Access 2010 database.

I am trying to get an average from several numbered fields, which some may occasionally be blank.

=Nz([JanUS],0)+Nz([FebUs],0)+Nz([MarUS],0)

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The real expression is ...

([GC A1 - 2]+[GC B1 - 2]+[GC C1 - 2]+[GC D1 - 2]+[GC E1 - 2]+[GC A2 - 2]+[GC B2 - 2]+[GC C2 - 2]+[GC D2 - 2]+[GC E2 - 2])/10

This expression works great until a field is left blank, and then the average box is left blank.

The fields I am trying to add are Long Integer. Would that affect it?

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Aug 17, 2006

Hello buddies :D, do you have any idea how to make this work?

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This is the criteria i curentlly have on my query in design view tha works perfect in selecting date only.
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Ok, here's the scoop. I have the following record setup for tracking shipments:

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I need to retrieve average values from another table for certain chemistry values based on the [Date_Loaded] and whether or not one or two silos were used when loading the shipment (as indicated by the [2_silos] checkbox).

Scenario #1 - one silo

I need average values of the last four samples based on the [date_Loaded] and the appropriate silo.

Scenario #2 - two silos

I need average values of the last two samples from each silo based on the [date_loaded], [primary_silo], and [secondary_silo].

Would anyone have any thoughts on this? I've tried crosstab and select queries, but I can't get anything to work.

My ultimate goal is to have a form where users select the shipment and the appropriate chemistry averages automatically populate the data fields.

Any help is greatly appreciated.

Thanks,

Greg

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I have tried

Code:
Between [StartDate:] And [EndDate:]

And

Code:
Between [StartDate:] & "00:00" And [EndDate:] & "23:59"

Neither of which work ....

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Hi,

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Hi,

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PTDAccess

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