What potential pitfalls should PHP developers be aware of when working with authority levels in separate tables?

When working with authority levels in separate tables, PHP developers should be aware of the potential pitfalls of inconsistency and difficulty in maintaining data integrity. To avoid these issues, developers should ensure that authority levels are properly linked to user data and regularly check for any discrepancies between the tables. 

// Example code snippet to ensure authority levels are properly linked to user data

// Query to retrieve user data along with their corresponding authority level
$query = "SELECT users.*, authority_levels.level
          FROM users
          JOIN authority_levels ON users.authority_id = authority_levels.id";

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

if(mysqli_num_rows($result) > 0) {
    while($row = mysqli_fetch_assoc($result)) {
        // Process user data and authority level
    }
} else {
    echo "No users found";
}

Keywords

PHP authority levels separate tables database normalization SQL joins

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