How can the combination of GROUP BY, MAX, and ORDER BY be used effectively in a PHP SQL query to retrieve desired results?

When using GROUP BY, MAX, and ORDER BY in a PHP SQL query, you can retrieve the desired results by first grouping the data based on a specific column, then using the MAX function to find the maximum value within each group. Finally, you can use ORDER BY to sort the results based on the aggregated values. 

$query = "SELECT column1, MAX(column2) AS max_value 
          FROM table_name 
          GROUP BY column1 
          ORDER BY max_value DESC";
$result = mysqli_query($connection, $query);

if(mysqli_num_rows($result) > 0){
    while($row = mysqli_fetch_assoc($result)){
        echo "Column 1: " . $row['column1'] . " | Max Value: " . $row['max_value'] . "<br>";
    }
} else {
    echo "No results found.";
}

Keywords

GROUP BY MAX ORDER BY SQL query PHP

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