A company has a customer master file with customer number as the primary key. It is stored in numeric order on magnetic tape. How should the daily sales transaction file (which is stored numerically by invoice number on a disk) be sorted (if at all) before it is used to update the customer master file? Why?

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The Answer of A company has a customer master file with customer number as the primary key. It is stored in numeric order on magnetic tape. How should the daily sales transaction file (which is stored numerically by invoice number on a disk) be sorted (if at all) before it is used to update the customer master file? Why?

A Company Has a Customer Master File with Customer Number