@ARGV and %ENV
The built-in array @ARGV contains the command line arguments for a Perl program. The following run of the Perl program critic.pl will have the ARGV array (“-poetry”, “poem.txt”).
unix% perl critic.pl -poetry poem.txt
%ENV contains the environment variables of the context that launched the Perl program.
@ARGV and %ENV make the most sense in a Unix environment.
So for example you have a script like test.pl
#!/usr/bin/perl use strict; my $column=$ARGV; my $database=$ARGV; ------run the program now--- $./test.pl ssn employees
in above example we are passing two values as commandline arguments. so $column will have “ssn” and $database will have “employees”.
Note: Pass values in quoutes if values have spaces.