What are the implications of avoiding SQL joins in PHP and relying on separate queries instead?

Avoiding SQL joins in PHP and relying on separate queries can lead to performance issues, as it can result in multiple round trips to the database and increased data transfer. It can also make the code more complex and harder to maintain. To solve this issue, it's recommended to use SQL joins whenever possible to fetch related data in a single query, which can improve performance and simplify the code. 

// Using SQL join to fetch related data in a single query
$query = "SELECT users.username, orders.order_id 
          FROM users 
          INNER JOIN orders ON users.user_id = orders.user_id";

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

if(mysqli_num_rows($result) > 0) {
    while($row = mysqli_fetch_assoc($result)) {
        echo "Username: " . $row['username'] . ", Order ID: " . $row['order_id'] . "<br>";
    }
}

Keywords

PHP SQL joins separate queries database performance data retrieval

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