Describes how the input column participates in the pivot operation. It can help define a set of related records, it can hold ...

Describes how the input column participates in the pivot operation. It can help define a set of related records, it can hold the key that uniquely identifies a row within the related set and upon which the values are pivoted, it can hold a value that gets transferred into a pivoted column or it can contain a value that simply passes straight though the pivot unchanged.