How can normalization in a single database be a more efficient solution for managing multiple clients' data in a PHP application compared to separate databases?

When managing multiple clients' data in a PHP application, using normalization in a single database can be more efficient than separate databases because it allows for easier maintenance, scalability, and data consistency. By structuring the database tables properly and establishing relationships between them, you can avoid data redundancy and ensure that updates or changes only need to be made in one place. 

// Sample PHP code snippet for connecting to a single normalized database

$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "clients_database";

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

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

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