I am trying to develop a report where in the PartNum footer the
average number of days between orders is calculated. I have 
created the following:
Table:	tblItemsRecvd
Fields:
	PartNum	
	SupplrName
	DateOrdrd
	DateRecd
	AmtRecd

Query:  qryItemsRecvd based on tblItemsRcvd
	PartNum	Criteria:	[Enter PartNum:]
	SupplrName
	DateOrdrd
	DateRecd
	AmtRecd

Report:	 rptItemsRecvd based on qryItemsRecvd

I would like to calculate the average number of days between orders for
the selected part number.  Do I do it in the query (how?) or at the report
level (how?)?  I am using Access2003 and am a novice.
TIA

Hi,

i would do this in the query by using the DateDiff-Function.
Take a look at this link:
http://www.techonthenet.com/access/functions/date/datediff.php

Regards
Jörn


Am 07.06.2010 01:49, schrieb JohnL:
> I am trying to develop a report where in the PartNum footer the
> average number of days between orders is calculated. I have
> created the following:
> Table:	tblItemsRecvd
> Fields:
> 	PartNum	
> 	SupplrName
> 	DateOrdrd
> 	DateRecd
> 	AmtRecd
>
> Query:  qryItemsRecvd based on tblItemsRcvd
> 	PartNum	Criteria:	[Enter PartNum:]
> 	SupplrName
> 	DateOrdrd
> 	DateRecd
> 	AmtRecd
>
> Report:	 rptItemsRecvd based on qryItemsRecvd
>
> I would like to calculate the average number of days between orders for
> the selected part number.  Do I do it in the query (how?) or at the report
> level (how?)?  I am using Access2003 and am a novice.
> TIA
>

JohnL wrote:

>I am trying to develop a report where in the PartNum footer the
>average number of days between orders is calculated. I have 
>created the following:
>Table:	tblItemsRecvd
>Fields:
>	PartNum	
>	SupplrName
>	DateOrdrd
>	DateRecd
>	AmtRecd
>
>Query:  qryItemsRecvd based on tblItemsRcvd
>	PartNum	Criteria:	[Enter PartNum:]
>	SupplrName
>	DateOrdrd
>	DateRecd
>	AmtRecd
>
>Report:	 rptItemsRecvd based on qryItemsRecvd
>
>I would like to calculate the average number of days between orders for
>the selected part number.  Do I do it in the query (how?) or at the report
>level (how?)?  I am using Access2003 and am a novice.


You can do it either place, but the quer would have to be
Totals type query, which may complicate things.

I think it is easier to do in a report with a text box
expression like:
	=Avg(DateDiff("d", DateOrdrd, DateRecd))
in either the partNum group header and/or footer section.

-- 
Marsh
MVP [MS Access]