How can SQL queries be utilized to efficiently solve the issue of counting Mac and Windows users in a database instead of manipulating arrays in PHP?

To efficiently count Mac and Windows users in a database using SQL queries, you can use a GROUP BY clause along with a CASE statement to categorize users based on their operating system. This way, you can retrieve the count of Mac and Windows users directly from the database without needing to manipulate arrays in PHP. 

$query = "SELECT 
            CASE 
                WHEN operating_system = 'Mac' THEN 'Mac' 
                WHEN operating_system = 'Windows' THEN 'Windows' 
            END AS os,
            COUNT(*) AS total_users
          FROM users
          GROUP BY os";

$result = mysqli_query($connection, $query);

while($row = mysqli_fetch_assoc($result)) {
    echo $row['os'] . " users: " . $row['total_users'] . "<br>";
}

Keywords

SQL queries Mac users Windows users database arrays manipulation

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