Code:
Tableid,table.txt
sourceid,1,2,3,4,5,6
targetid,1,2,3,4,5,6
Tableid,table
sourceid,1,2,3,4,5,6
targetid,1,2,3,4,5,6
Tableid,table.txt
sourceid,1,2,3,4,5,6
targetid,1,2,3,4,5,6
Tableid,table
sourceid,1,2,3,4,5,6
targetid,1,2,3,4,5,6
Tableid,table.txt
sourceid,1,2,3,4,5,6
targetid,1,2,3,4,5,6