What are the potential pitfalls of using redundant SQL commands in PHP applications?

Using redundant SQL commands in PHP applications can lead to inefficient database queries, increased server load, and slower application performance. To avoid this, it is important to optimize SQL queries by removing unnecessary or duplicate commands.

// Example of optimizing SQL queries by removing redundant commands
$sql = "SELECT * FROM users WHERE status = 'active'";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        // Process data
    }
}
$result->free();
$conn->close();