SQL Update Statement

Question

I have 2 tables, Products and ShoppingCart and I would like to update and decrease the product\'s \'Quantity\' of the Products table based on the Product name and Quantity speci

Answer 1

You should have a product id. However:

 UPDATE Products p
 INNER JOIN [Shopping Cart] s
 ON p.[Product Name] = s.[Product Name]
 SET p.ProductQty = p.ProductQty - s.ProductQty

You should get rid of spaces in field and table names, as well.