use DBI;
use DBD::ODBC;

my ( $data_source, $database, $user_id, $password ) = qw( server datab
+ase user password );

my $conn_string = "driver={SQL Server};Server=$data_source;Database=$d
+atabase;UID=$user_id;PWD=$password";

my $dbh = DBI->connect( "DBI:ODBC:$conn_string" ) or die $DBI::errstr;

my $sql = "SELECT * FROM tbl_Foo (NOLOCK)";

my $sth = $dbh->prepare( $sql );
$sth->execute;

while ( my $result = $sth->fetchrow_hashref ) {

    # Your fields can be accessed through the $result hashref, for exa
+mple:

    print $result->{First_Name};

}

$dbh->disconnect;