Question

I’m using this syntax instead of count (*) because it’s supposed to be faster but I dont know how to fetch the resulting output

$alreadyMember = $dataBase->prepare('SELECT EXISTS ( SELECT 1 
FROM TheCommunityReachLinkingTable 
WHERE communityKey = :communityKey 
AND userID = :userID)');
$alreadyMember->bindParam(':communityKey', $_POST['communityKey'], PDO::PARAM_STR);
$alreadyMember->bindParam(':userID', $_POST['userID'], PDO::PARAM_INT);
$alreadyMember->execute();

if($alreadyMember->fetch()) {do code here} 

But it doesn’t seems to return something correct, any idea?

Answer 1

The use of EXISTS seems wrong here. Just execute this query instead:

SELECT 1 
FROM TheCommunityReachLinkingTable 
WHERE communityKey = :communityKey 
AND userID = :userID