i m new in sql. and i want to sum two columns value from different tabales

Rashid Choudhary asked:

i have two table stock and product_order.in first table i having three columns item_code,product_name,stock_on_hand and in second table product_name,product_quan,check_bit.... i want that when the value of check_bit is change 0 to 1 then the stock_on_hand=(stock_on_hand+product_quan) ....what should i do

Tags: SQL Server

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