How to Refer to a count(*) column in a PDO Query

Question

$stmt = $con->prepare("SELECT t.name, COUNT(*) 
                        FROM team t
                        JOIN member m ON FIND_IN_SET( m.team_id, t.id ) >0
                        GROUP BY t.name
                        LIMIT 0 , 30");
$stmt->execute();
$stmt->setFetchMode(PDO::FETCH_BOUND);
$stmt->bindColumn('count', $count);
$stmt->bindColumn('name', $name);
while ($row = $stmt->fetch()) 
{
     echo "<tr><td>".$name."</td>";                   
    echo "<td>".$count."</td>";
 }

The code above retrieves 2 columns: name and the count(*) . The problem is with accessing the count column; I get the below error.

Warning: PDOStatement::bindColumn(): SQLSTATE[HY000]: General error: Did not find column name 'count' in the defined columns; it will not be bound in

How can I bind to that total count?

Answer 1

Use an alias: COUNT(*) as count .

$stmt = $con->prepare("SELECT t.name, COUNT(*) as count
                        FROM team t
                        JOIN member m ON FIND_IN_SET( m.team_id, t.id ) >0
                        GROUP BY t.name
                        LIMIT 0 , 30");

$stmt->execute();
$stmt->setFetchMode(PDO::FETCH_BOUND);
$stmt->bindColumn('count', $count);
$stmt->bindColumn('name', $name);

while ($row = $stmt->fetch()) 
{
    echo "<tr><td>".$name."</td>";                   
    echo "<td>".$count."</td>";
}

Answer 2

Instead of using aliases with column names, you can specify the column number (starting from 1).

$stmt = $con->prepare("SELECT t.name, COUNT(*) 
                        FROM team t
                        JOIN member m ON FIND_IN_SET( m.team_id, t.id ) >0
                        GROUP BY t.name
                        LIMIT 0 , 30");
$stmt->execute();
$stmt->setFetchMode(PDO::FETCH_BOUND);
$stmt->bindColumn(2, $count);
$stmt->bindColumn(1, $name);