Question

I have to compare columns of tables located in two different databases in two different servers. So far, I know how to connect to one server & one database using Perl script. Is it possible to connect to two different servers using Perl’s DBI module? If so, how?

Answer 1

You connect to a database using DBI->connect(). This returns a handle to that database. To connect to two databases, use two handles:

my $dbh1 = DBI->connect($connectstr1, $user1, $password1, 
    { PrintError => 1, AutoCommit => 1 });
my $dbh2 = DBI->connect($connectstr2, $user2, $password2, 
    { PrintError => 1, AutoCommit => 1 });

Now you can use $dbh1 for the first database, and $dbh2 for the second.