errr

      $result = $wpdb->query("SELECT tax_rate_state, count(*) AS tagCount FROM wp_woocommerce_tax_rates GROUP BY tax_rate_state ");

      if($result === FALSE) {

      echo mysql_error();
      $sql = "SHOW TABLES LIKE '%'";
      $results = $wpdb->get_results($sql);

      foreach($results as $index => $value) {
      foreach($value as $tableName) {
        echo $tableName . '<br />';
      }
      }