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Old December 5th, 2004, 01:42 PM
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Default Update Table fields

Please Help !
I made a access db with following tables:
I can't update the stock field of products table when input a new order from orders form. For Example
I have a stock of 15 pcs for a product.A customer orders 5 pcs of this product.I am searching a way so when I input this order (in orders form) the stock field of table Products updates to 10 pcs(15-5)
I tried several ways to solve this problem (Vba ,Sql) but nothing.
I appreciate if you help me
Thank you in advance
P.S. If this help I can tell you more details or send a demo of my db

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Old December 6th, 2004, 05:30 AM
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Suspect that the record you are trying to update is a result of a join of tables where there Primary and Foreign keys are not truly unique and thus can't update.

Suggest that you run a UPDATE query using the unique index of the record in the OrderDetails table only.

Cheers Ray
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Old December 7th, 2004, 03:48 PM
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update table Products from trigger for update on OrderDetails table:
 minus stock Products where Orderdetail.ProductID = inserted.ProductID

and plus from trigger for delete.

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