hi guys im new to access i tried different tutorial but seems i cant still get it.. my problem is i have this fields i dont know how to relate them... product name, brand, ( note each product name have different serial number), date in, date out(sold to customer) Quantity in , Quantity out, Balance.. for example a watch i have 3 units this 3 units have serial number of Abc1, abc2 abc3.. help me please