5.14 - Consider the following six relations for an order-processing database application in a company: CUSTOMER (Cust#, Cname, City) ORDER (Order#, Odate, Cust#, Ord_Amt) ORDER_ITEM (Order#, Item#, Qty) ITEM (Item#, Unit_price) SHIPMENT (Order#, Warehouse#, Ship_date) WAREHOUSE (Warehouse#, City) Here, Ord_Amt refers to total dollar amount of an order; Odate is the date the order was placed; Ship_date is the date an order (or part of an order) is shipped from the warehouse. Assume that an order can be shipped from several warehouses. Specify the foreign keys for this schema, stating any assumptions you make. What other constraints can you think of for this database?

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Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.