Difference between database integrity and database security?

Integrity is related to trust in terms of the data. We need to be sure that the data is being retrieved accurately. Particularly when there are multiple tables that are linked to each other, we need to be sure we can trust those links so that data can be selected from linked databases. This is all about database integrity.

Database security is making sure the database is safe. Different people may have different levels of access and some people should have no access at all. Things like passWords and other security measures will do this. Some users may be allowed to see data, but not change it. Some users may only be able to see some data that is relevant to what they need to do, but not have access to other data. So for example, in a company only the people that work in the wages department will have access to that data and the ability to change it. People in other department would not be able to do that. That is all part of database security.