File represents some characteristic of the real-world object that is being modelled

FILE-BASED SYSTEMS DISADVANTAGES:

Database is an organized shared collection of related data used to support the activities of a particular organization.

Traditional database applications

Multimedia databases

Data warehouses systems:

........ is data about data

In Data Base information stored in the catalog is called Meta-Data,

NOSQL systems require meta-data.

In DB insulation between the programs and data is also called program-data independence.

DB multiple views of the data

........... s the intermediate layer between the database and the programs that access the data.

........... is collection of programs that enables users to create and maintain a database and control access to them.

the primary key cannot have a NULL value, so the candidate key with a NULL value can be the primary key

There can be more than one candidate key in a relationship.

What is the self-describing nature of a database system?

What is stored in the DBMS catalog of a database system?

Which type of systems do not require metadata in NOSQL systems?

What is the insulation between programs and data called in a database system?

What does a view represent in a database system?