When normalizing a database structure for PHP applications, what considerations should be taken into account when determining the relationships between tables and using JOIN statements effectively?

When normalizing a database structure for PHP applications, it is important to properly define the relationships between tables to ensure data integrity and efficient querying. When using JOIN statements, consider the type of JOIN (INNER, LEFT, RIGHT) based on the desired result set and the relationships between tables. Additionally, use aliases for table names to improve readability and avoid naming conflicts. 

// Example of using JOIN statement in PHP code
$query = "SELECT users.name, orders.order_date FROM users
          JOIN orders ON users.id = orders.user_id
          WHERE users.status = 'active'";

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

while ($row = mysqli_fetch_assoc($result)) {
    echo "User: " . $row['name'] . " | Order Date: " . $row['order_date'] . "<br>";
}

Keywords

database normalization table relationships JOIN statements PHP applications error handling

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