Question

I have a query that im trying to collect tallys from fields in one query to avoid querying 4 times i added them all into one query.

But i am getting this error:

SQLSTATE[42000]: Syntax error or access violation: 1064
You have an error in your SQL syntax; check the manual that corresponds
to your MySQL server version for the right syntax to use near

           ')) as english,
            sum(if(class='2')) as science,
            sum(if(class='3')) as french 
            F' at line 3

I’m not sure how the syntax is meant to be for this so was hopeing some one might know… my query is this:

$stmt = $pdo->prepare("SELECT 
            count(id) AS total, 
            sum(if(class=?)) as english,
            sum(if(class=?)) as science,
            sum(if(class=?)) as french 
            FROM school");

    try{
        $stmt->execute(array(1,2,3));
    } catch (PDOException $e){
        echo $e -> getMessage();  exit;
    }   

Does any one know the correct syntax for this ?

Answer 1

At least, you have missed a right bracket in each sum line.

Then, Im not sure about if(..,..,..) statement, I usually write CASE WHEN (condition) THEN expr1 ELSE expr2 END