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Combining Queries

Combining Queries

Combining Queries

Hi all,

I have the following tables and need to update data between them:


Desc PrevQty


Desc Qty
abc 10
def 15
ghi 20
abc 30
xyz 10

I need help with a query to get the total Qty from tableB and update the PrevQty in TableA.

When the query is run, TableA should look like this:


Desc PrevQty
abc 40
def 15
ghi 20
xyz 10

so far I have this for the query:

SELECT Desc, sum(Qty) as TotalQty
Group By Desc;

This obviously gives me the total qty for each desc - the trouble I am having is combining this with an update query to modify TableA - I hope I am half way there :)  There is every possibility that what I have started with is wrong!!

Any help or guidance offered is greatly appreciated.


RE: Combining Queries

I'm not sure of the best ANSI SQL way to do this.  You'll probably have to to an update for each Desc.  If you tell me what database you're using, and what language interacts with  the database, I'll see what I can come up with for a solution.

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RE: Combining Queries

Hi guys,

@jaxtell, I am using a MS Access database

@PHV, When you view the the query it gives a result which doesn't look as if it has consolidated the part numbers.  Although when you try to run the query it gives an error:
"Operation must use an updateable query"

Thanks for the help guys.

All help is greatly appreciated
Kind regards

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