SQL

Handling NULL Values Gracefully with COALESCE

Use the `COALESCE` function to return the first non-NULL expression in a list, ensuring default or fallback values are displayed instead of NULLs in your SQL query results.

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 is used here to elegantly handle NULL values in query results. For the `description` column, if a product's description is NULL, `COALESCE` replaces it with the string 'No description available'. Similarly, if `price` is NULL, it defaults to 0.00. This ensures that your query results are always more user-friendly and consistent, avoiding blank or NULL entries for critical display fields.

Handling NULL Values Gracefully with COALESCE

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