What are the potential pitfalls of using fetchColumn() instead of fetch() in PHP when retrieving data from a database?

Using fetchColumn() instead of fetch() in PHP when retrieving data from a database can lead to potential pitfalls such as only retrieving a single column value instead of a full row of data. To solve this issue, you should use fetch() to fetch an entire row of data from the database result set. 

// Using fetch() to retrieve a full row of data from the database
$stmt = $pdo->query('SELECT * FROM users');
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
    // Process the row data here
    echo $row['username'] . '<br>';
}

Keywords

fetchColumn fetch database data retrieval PHP

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