What is the significance of using INNER JOIN in PHP queries?

When working with databases in PHP, using INNER JOIN in queries allows you to retrieve data from multiple tables based on a related column between them. This is useful for fetching data that is spread across different tables and needs to be combined for analysis or display purposes. 

// Example of using INNER JOIN in a PHP query
$query = "SELECT users.name, orders.product
          FROM users
          INNER JOIN orders ON users.id = orders.user_id";

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

if(mysqli_num_rows($result) > 0) {
    while($row = mysqli_fetch_assoc($result)) {
        echo "User: " . $row['name'] . " | Product: " . $row['product'] . "<br>";
    }
} else {
    echo "No results found.";
}

Keywords

INNER JOIN PHP queries SQL database data retrieval

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