Access 2000 - Stock decrease

Dear Experts,

Could you please advise in the attached database with an example which sounds easy but I was not able to solve it in Access.

Briefly there are two tables, one contains orders, one item 10102 is twice so have two orders

Product      Order Date      Order qty
10101      2010-03-07      10
10102      2010-03-09      10
10103      2010-03-10      10
10102      2010-03-07      10

The second table has current stocks, the 10102 is once

Product      Stock qty
10101      100
10102      100
10103      100

How could be done in Query1 a calculation in column "Remaining stock", which would show like below that the first order 10pcs is assigned to date 2010-03-07 so remaining is 90pcs, after comes the second order with later date 2010-03-09 so the remaining is 80pcs

Product      Stock qty      Order qty      Order Date      Remaining stock
10102      100      10      2010-03-09                  80
10102      100      10      2010-03-07                  90

Currently the Query1 calculates 90pcs for both line, but would like to have 80pcs at line with 2010-03-09

thanks,
Decrease-stock.zip
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csehzIT consultantAsked:
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Rey Obrero (Capricorn1)Commented:
a better way is to convert your query to a Make table query and export the created table.
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Rey Obrero (Capricorn1)Commented:
see the function from this link

How to Create a Grouped Running Sum in a Query
http://support.microsoft.com/?kbid=205183
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csehzIT consultantAuthor Commented:
Capricorn thanks very much, in the attached database applied the logic and the query RunSum calcualtes well, but somehow strangly if I apply that field in another query so in Remaining_qty, the values are different.

Do you have idea maybe why?

It is also interesting that if the RunSum query is run to the screen (first attached picture), there the calculated values are different than the exported to excel version (second attached picture)





Decrease-stock-RunSum.zip
AfterQueryRun.jpg
AfterExcelExport.jpg
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Rey Obrero (Capricorn1)Commented:
that is weird.. anyway
*do a compact and repair
* select query Runsum from the database window (do not open)
* File > export > select excel 97-2003

* see the resulting Excel file
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csehzIT consultantAuthor Commented:
Capricorn sorry only today had the chance to check, with the make table query it works
Decrease-stock-RunSum.zip
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