vm_name, vm_cluster,
vm1, ha1, 
vm2, ha2, 
vm3, ha3,

##</code><code>##

vm_name, vm_cluster, Zone,
vm1, ha1, zone2,
vm2, ha2, zone3,
vm3, ha3, zone1, 

##</code><code>##

my $table = "mapping";
my $sth = $dbh->prepare ("INSERT INTO $table (Zone) VALUES (?,)"  ); 
$sth->execute ( '<whatever_zone>');

##</code><code>##

Execution ERROR: No such column 'Zone' called from dbd1.pl at 29