CASE WHEN - Allows for conditional logic to mask data based on specific conditions but may require complex queries for dynamic role-based masking.

IF ELSE - Suitable for simple conditional checks to mask data but lacks the flexibility for complex role-based scenarios without extensive scripting.

COALESCE - Useful for replacing NULL values with a default value, thus masking NULLs, but does not address the need for dynamic masking based on user roles.

All of the above - By combining these functions, you can create dynamic views that perform comprehensive data masking tailored to user roles and permissions, ensuring compliance and data utility.