I would know what is better for an application using pdo in php on the result and application speed.
$Qcountries = $OSCOM_PDO->prepare('select countries_id,
countries_name
from :table_countries
where countries_iso_code_2 = :countries_iso_code_2
limit 1');
$Qcountries->bindValue(':countries_iso_code_2', $country );
$Qcountries->execute();
$countries = $Qcountries->fetch();
$country_name = $countries['countries_name'];
echo $country_name;
or
$Qcountries = $OSCOM_PDO->prepare('select countries_id,
countries_name
from :table_countries
where countries_iso_code_2 = :countries_iso_code_2
limit 1');
$Qcountries->bindValue(':countries_iso_code_2', $country );
$Qcountries->execute();
echo $Qcountries->value('countries_name');