How can PHP developers ensure accurate data aggregation when working with MySQL queries for statistical analysis?

To ensure accurate data aggregation when working with MySQL queries for statistical analysis, PHP developers should use aggregate functions like SUM, AVG, COUNT, etc., to perform calculations on the data. They should also group the data using the GROUP BY clause to ensure that the aggregation is done correctly based on specific criteria. 

$query = "SELECT category, SUM(sales) AS total_sales FROM sales_data GROUP BY category";
$result = mysqli_query($conn, $query);

if (mysqli_num_rows($result) > 0) {
    while ($row = mysqli_fetch_assoc($result)) {
        echo "Category: " . $row['category'] . " - Total Sales: " . $row['total_sales'] . "<br>";
    }
} else {
    echo "No data found";
}

Keywords

PHP MySQL data aggregation statistical analysis query optimization

Related Questions