Processes | Copy Number | Key Variable(s) to Merge with Input SAS Data Set

Key Variable(s) to Merge with Input SAS Data Set
Use this field to specify the variables from the Input SAS Data Set by which to merge with the Filter Data Set.
If this field is left blank , these merge variables are assumed to be the same as the variables specified in the Variables By Which to Merge Filter Data Set field.
To Specify One or More Key Merge Variables:
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All of the variables in the specified input data set are displayed in the Available Variables field.
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Click to add the highlighted variable(s) to the Key Variable(s) to Merge with Input SAS Data Set field.