my $cor ;
my $date ;
for my $data_pair (@data_list) {
      if($data_pair->{'key'} eq 'correct'){
        $cor= $data_pair->{'value'};
      }
      if($data_pair->{'key'} eq 'date'){
        $date= $data_pair->{'value'};
      } 
}
my $sql_content = "INSERT IGNORE INTO correct SET text='".$cor."' date='" .$date."'";

##</code><code>##

my %data_hash = map {$_->{'key'} => $_->{'value'} if ($_->{'key'} eq 'correct' || $_->{'key'} eq 'date')} @data_list;
my $sql_content = "\nINSERT IGNORE INTO correct SET text='".$data_hash{'correct'}."' date='" .$data_hash{'date'}."'";