MERGE

MERGE merge-file

     { KEY AREA IS key-table          }

     { ON {ASCENDING } KEY {key-name} } ...
          {DESCENDING}

     [ COLLATING SEQUENCE IS alpha-name ]

       USING {in-file} ...

     { OUTPUT PROCEDURE IS proc-name  }
     { GIVING {out-file} ...          }

NOTE: proc-name has the following format

     start-proc [ {THRU   } end-proc ]

                  {THROUGH}