What is the significance of using JOIN in PHP when querying data from multiple tables?

When querying data from multiple tables in PHP, using JOIN is significant because it allows you to combine rows from two or more tables based on a related column between them. This helps in retrieving data from multiple tables in a single query, which can be more efficient than making separate queries and then combining the results in your code. 

// Example of using JOIN in PHP to query data from multiple tables
$query = "SELECT orders.order_id, customers.customer_name 
          FROM orders 
          JOIN customers ON orders.customer_id = customers.customer_id";
$result = mysqli_query($connection, $query);

if(mysqli_num_rows($result) > 0) {
    while($row = mysqli_fetch_assoc($result)) {
        echo "Order ID: " . $row['order_id'] . ", Customer Name: " . $row['customer_name'] . "<br>";
    }
} else {
    echo "No results found.";
}

Keywords

JOIN PHP querying data multiple tables

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