Just a minor comment:
SELECT *
I would replace that with 
SELECT column1, column2, ..

[download]
to ensure that you get the columns in the order you expect.

Continue down the same road with the fetch:

while ( my @arr = $sth->fetchrow_array() )
I would replace that with 
while ( my $href  = $sth->fetchrow_hashref() ) {
   my $col1 = $href->{column1};
   my $col2 = $href->{column2};
   ...
}

[download]
This way I'm certain that my variables correspond to the values by name, not just by their position in the array.
--
print map{chr}unpack(q{A3}x24,q{074117115116032097110111116104101114032080101114108032104097099107101114})

In reply to Re: Extra iteration while fetching 'fetchrow_array' in DBI and standerd way of using DBI by andreas1234567
in thread Extra iteration while fetching 'fetchrow_array' in DBI and standerd way of using DBI by cool

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