Customer data are a virtual treasure chest- rich with insights into customer's behavior and individual needs. Database quality is the result of four elements. Briefly describe these four elements. Which of these four is the responsibility of the data owner and usually occurs before data is entered into the database. System integrity is achieved when data inserted into a database is the same as the contents of that data when it is subsequently retrieved.
Data integrity ensures that the data is feasible and correct for the application in hand.
Consistency is achieved when the state of all data across a system was arrived at by a series of consistent procedures. This is usually performed by application programs. This means that you design an application so that it is easy to always do the same thing, the same way. It is implied that integrity and consistency do not together guarantee accuracy. For example, if your application uses weight data, but the scale the weights were taken on was not accurate, then there is little you can do as the application developer to improve the quality of the weight data.