How can the SUM function be used in PHP to calculate total amounts in a database query?

To calculate total amounts in a database query using the SUM function in PHP, you can use a SQL query that includes the SUM function to add up the values in a specific column. This can be useful for calculating totals, averages, or other aggregate functions on numeric data in a database table. 

// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Query to calculate total amount using SUM function
$sql = "SELECT SUM(amount) AS total_amount FROM transactions";

$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "Total Amount: $" . $row["total_amount"];
    }
} else {
    echo "0 results";
}

$conn->close();

Keywords

PHP SUM function database query total amounts calculation

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