Access Custom Query

I have 2 tables. The first contains potential customers with name, address and zip code fields and a SalesId field. The second table contains sales territories with SalesId, BeginningZip and EndingZip fields.

I need a query that will marry the 2 tables together and assign the SalesId value from the sales territories table to the customer's table where the zipcode falls in the beginning and ending zip ranges.  
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Dale FyeCommented:
After backing up your database, try:

UPDATE table1
SET SalesID = DLOOKUP("SalesID", "Table2", "[BeginningZip] <= '" & table1.ZipCode & "' AND [EndingZip] >= '" & table1.zipcode & "'")
Rey Obrero (Capricorn1)Commented:
update customers c, territory t
set c.salesid=dlookup("salesID", "t","[c].[zip] >=  [t].[beginnningZip]  and  [c].[zip] <=[t].[endingzip])
Select * from customerTable a,salesTable b
where a.SalesId=b.SalesId and (a.zipcode>=b.BeginningZip and a.zipcode<=b.EndingZip);

Your current tables:
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dwcummingsAuthor Commented:
Thanks for getting back to me so quickly.

Fyed, I tried your suggestion, but it didn't work. It actually deleted values that already existed in the SalesId field.

Capricorn1, I get an error message when I attempted to use your suggestion, that being "Unknown".

Here is my SQL statement. Perhaps I entered something incorrectly.

UPDATE 16263A2 AS C, dbo_tblSalesTerritories AS T SET C.SalesId = DLookUp("SalesId","T","[C].[Czip] >= [T].[BeginningZip] and [C].[Czip] <= [T].[EndingZip]");
Rey Obrero (Capricorn1)Commented:

UPDATE [16263A2] AS C, [dbo_tblSalesTerritories] AS T SET C.SalesId = DLookUp("SalesId","T","[C].[Czip] >= [T].[BeginningZip] and [C].[Czip] <= [T].[EndingZip]");
dwcummingsAuthor Commented:
Same result - "Unknown" error message.
Rey Obrero (Capricorn1)Commented:

UPDATE [16263A2] AS C, [dbo_tblSalesTerritories] AS T SET C.SalesId = " & DLookUp("SalesId","T","[C].[Czip] >= [T].[BeginningZip] and [C].[Czip] <= [T].[EndingZip]");
dwcummingsAuthor Commented:
I get a syntax error message.
Rey Obrero (Capricorn1)Commented:
try this

UPDATE [16263A2] AS C, dbo_tblSalesTerritories AS T
SET C.SalesID = [T].[SalesId]
WHERE C.Czip>=[T].[BeginningZip] AND C.Czip<=[T].[EndingZip]

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dwcummingsAuthor Commented:

It worked like a charm. Thanks for the help.

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