Linking Data Sets
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Introduction
Two data sets may be "linked" when each contains a variable that represents the same information, encoded with identical values. For example, a data set of Sales Records and a data set of Product Inventory may both contain a variable of Product ID Numbers. In this case, the two data sets may be linked by their respective Product ID Number variables such that filtering on this variable in one data has the same effect as if the variable were simultaneously filtered in BOTH data sets.
