Are there any best practices for writing database queries in PHP to exclude specific data?

When writing database queries in PHP to exclude specific data, it is best practice to use the WHERE clause in your SQL query to filter out the unwanted data. This can be achieved by specifying the condition that the excluded data should not meet. By using the WHERE clause effectively, you can ensure that only the desired data is returned from the database query.

// Example of excluding specific data in a MySQL query using WHERE clause
$excludedData = 'excluded_value';
$sql = "SELECT * FROM table_name WHERE column_name != :excludedData";
$stmt = $pdo->prepare($sql);
$stmt->bindParam(':excludedData', $excludedData);
$stmt->execute();
$results = $stmt->fetchAll();