70 Center for Health and Gender Equity, Gender, AIDS and ARV Therapies Ensuring that Women gain equitable access to drugs within US funded Treatment Initiatives (2004), p. 3.

You may create different database users for every aspect of your application with very limited rights to database objects. The most required privileges should be granted only, and avoid that the same user can interact with the database in different use cases. This means that if intruders gain access to your database using one of these credentials, they can only effect as many changes as your application can.