The Merge process joins two data sets, side by side, with matching row variables . This feature is especially useful for joining a data set with annotation data or other information.Two SAS data sets are required for the Merge process. One of these is specified as the base input data set while the other is specified as the merge input data set .For detailed information about the files and data sets used or created by JMP Life Sciences software, see Files and Data Sets .Refer to the Merge output documentation for a detailed description of the output of this process