What are the potential pitfalls of using the Count function in PHP when trying to sum values from a database column?

Using the Count function in PHP will only count the number of rows returned from a database query, not the sum of values in a specific column. To sum values from a database column, you should use the SUM function instead. 

// Connect to the database
$pdo = new PDO("mysql:host=localhost;dbname=mydatabase", "username", "password");

// Query to sum values from a specific column
$query = $pdo->query("SELECT SUM(column_name) AS total_sum FROM table_name");

// Fetch the result
$result = $query->fetch(PDO::FETCH_ASSOC);

// Output the total sum
echo $result['total_sum'];

Keywords

Count function PHP sum values database column potential pitfalls

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