This meets your specifications: 
my $conn = 20;

my @dbh = map { DBI->connect ('DBI:Oracle:host=EM12;sid=orcl',"hr","hr
+")
        or die "Failed to connect to database: " . DBI->errstr} 1..$co
+nn;
for my $t (1..$tables){
  my $sql = ....
  $dbh[$t % $conn]->do ($sql) or die DBI->errstr;
}

[download]
What this achieves is less clear.

             "By three methods we may learn wisdom: First, by reflection, which is noblest; Second, by imitation, which is easiest; and third by experience, which is the bitterest."           -Confucius

In reply to Re: How can I change my script to make multiple connections to do the job by NetWallah
in thread How can I change my script to make multiple connections to do the job by terrykhatri531

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