I have a 10,000,000 row file; need to add a line (row) number.
Data Before:
MyComapny, Inc
First Last Place, Suite 1000
Dallas, Texas 77777
214-000-0000
Data After:
0000000001 MyComapny, Inc
0000000002 First Last Place, Suite 1000
0000000003 Dallas, Texas 77777
0000000004 214-000-0000