Select Code to Download

      my $sth = $dbh->prepare( "select bar from foo where bar=baz" );
      $sth->execute;   # selects rows where 2 columns have same values
# vs:
      my $sth = $dbh->prepare( "select bar from foo where bar=?" );
      $sth->execute( "baz" );   # selects rows where bar='baz' (3-lett
+er literal)