What are some best practices for linking and displaying data from multiple tables in a PHP application?

When linking and displaying data from multiple tables in a PHP application, it is best practice to use SQL JOIN queries to combine related data from different tables. This allows you to retrieve all the necessary information in a single query and display it in a structured manner. Additionally, you can use aliases to differentiate between columns with the same name in different tables. 

<?php
// Connect to the database
$pdo = new PDO('mysql:host=localhost;dbname=your_database', 'username', 'password');

// Query to select data from multiple tables using a JOIN
$stmt = $pdo->prepare('SELECT t1.column1, t2.column2 FROM table1 t1 JOIN table2 t2 ON t1.id = t2.table1_id');
$stmt->execute();

// Display the retrieved data
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
    echo $row['column1'] . ' - ' . $row['column2'] . '<br>';
}
?>

Keywords

SQL JOIN data retrieval foreign keys database normalization PHP frameworks

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