In database system one of the main feature is that it maintains data integrity. When integrity constraints are not enforces then the data loses its integrity.

The integrity of data is when you manipulate and collect the data. It is mostly done in databases.

Yes, that is what data integrity is all about.

Data integrity is a term used in databases.

In its broadest use, "data integrity" refers to the accuracy and consistency of data stored in a database, data warehouse, data mart or other construct. The term - Data Integrity - can be used to describe a state, a process or a function - and is often used as a proxy for "data quality".

Data integrity.