Interval Match Extended Syntax Key Field

The extended IntervalMatch prefix is used to create a table matching discrete numeric values to one or more numeric intervals, while at the same time matching the values of one or several additional keys.

This is a very powerful and flexible feature that can be used for linking transactions with dimensions that are changing over time.

Matchfield is the field containing the discrete numeric values to be linked to intervals.

Keyfield(s) are fields that contain the additional attributes that are to be matched in the transformation.

Reference:
https://help.qlik.com/en-US/qlikview/...

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