I was able to write up a rough script based on your recommendations. And it works!
#!/usr/bin/perl
use BerkeleyDB;
print "start\n";
my $filename = '/home/user/Perl/AA';
#unlink $filename ;
my %h ;
my $dbh = tie %h, 'BerkeleyDB::Btree',
-Filename => $filename,
-Flags => DB_CREATE
or die "Cannot open $filename $! $BerkeleyDB::Error" ;
foreach $key (keys %h)
{
my ($open, $high, $low, $close, $volume, $interest)
= unpack "dddddl", $h{$key};
print "$key: $open,$high,$low,$close,$volume,$interest\n";
# print "$h{$key}\n";
}
untie %h;
print "end\n";
Thank You for your help.