Handle NULL Values Gracefully with COALESCE

SELECT
    product_id,
    product_name,
    COALESCE(description, 'No description available') AS product_description,
    COALESCE(price, 0.00) AS actual_price
FROM
    Products;

How it works: The `COALESCE` function returns the first non-NULL expression in its argument list. This is extremely useful for providing default values when a column might contain `NULL`. In this example, if the `description` column is `NULL`, it will be replaced by 'No description available'. Similarly, if the `price` column is `NULL`, it defaults to `0.00`, ensuring that the output is always meaningful and easy to display in applications or reports.