How to do it in Trigger ?

Question

Hello gentlemen,Ladies

I have two tables Quantity and Purchases. When I purchase a product, first I have to check either it's old product or new. If it's Old means I have purchased before and its details already saved in the Database in Quantity Table so it will update the AvailableQuantity field only in the Quantity Table. Else if it's a new Product it must add new row in the Quantity Table with all details of the product.

I hope it's clear for all

I need your comment. How to do it with Trigger ( IF Exist Update else Insert ) or give me another solution.

Answer 1

0

Something like this. Use a procedure instead of a trigger

If exists(select * from products where product_name=@product_name)            
    Update Quantity            
    set ....            
    where product_name=@product_name            
else            
    insert into products(columns)            
    select @columns

answered Oct 22 '09 at 03:57 AM

Madhivanan
1.1k ● 1 ● 2 ● 6

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