Key Field

A field whose values are used to build a summary. Each unique value found within each key field is used to build a one or two dimensional matrix. In the following across key summary for a music distributor, the CUSTOMER and MEDIA fields are the key fields. The matrix lists all customers down the left side and all media types across the top. The cells in the matrix represent the quantity of each media type sold to each customer.

 

 

 

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