How to Efficiently Sum a MySQL Column's Values in PHP?

MySQL Column Sum Calculation in PHP

You wish to calculate and return the sum of values in a MySQL column. While attempting to use a loop, you've encountered issues.

A loop isn't necessary for this task. You can directly obtain the sum using a MySQL query:

SELECT SUM(column_name) FROM table_name;

Alternatively, if you prefer using PHP's prepared statements (PDO) which is the recommended and secure approach, consider the following code:

$stmt = $handler->prepare('SELECT SUM(value) AS value_sum FROM codes');
$stmt->execute();

$row = $stmt->fetch(PDO::FETCH_ASSOC);
$sum = $row['value_sum'];

Or, if using MySQLi:

$result = mysqli_query($conn, 'SELECT SUM(value) AS value_sum FROM codes');
$row = mysqli_fetch_assoc($result);
$sum = $row['value_sum'];

This code efficiently retrieves the sum of the specified column without the need for a loop.

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