Help with Query Syntax for Update Query

I am trying to update all of one field's table to another field's data based upon a link between the two tables.:

UPDATE CustSalesByPartPastYearTemp SET CustItem = (SELECT [CUST ITEM #] FROM [INVOICE DETAILS] INNER JOIN CustSalesByPartPastYearTemp ON [INVOICE DETAILS].[LINESERIAL#] = CustSalesByPartPastYearTemp.LineSerial)

Basically, I want the field CustItem in table CustSalesByPartPastYearTemp to equal what the field CUST ITEM # in the table INVOICE DETAILS is by linking the fields LineSerial and LINESERIAL#.

This gives an error saying :Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

I am attempting to run this on an .asp page, sql-2000 is the back end database.
dzirkelbAsked:
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Dukster131Commented:
You should be able to do something like this if I understand you correctly

UPDATE  t
Set CustItem = [CUST ITEM #]
from CustSalesByPartPastYearTemp t
inner join [INVOICE DETAILS] d on t.CustItem = d.[CUST ITEM#]
INNER JOIN CustSalesByPartPastYearTemp p on p.LineSerial = d.[LINESERIAL#]
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dzirkelbAuthor Commented:
Thanks.  Your post led me to the following working code:

UPDATE CustSalesByPartPastYearTemp SET CustItem = [CUST ITEM #] FROM CustSalesByPartPastYearTemp INNER JOIN [INVOICE DETAILS] on CustSalesByPartPastYearTemp.LineSerial = [INVOICE DETAILS].[LINESERIAL#]
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Query Syntax

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