What do you understand by database and database management system Soft ware. Also
enlist functions of DBMS.

The answer to this question is given below in this explanation section.

Explanation:

A database management system(DBMS) is a software package designed to define,manipulate,retrieve and manage data in a database.A DBMS generally manipulates  the data itself the data format,field names,record structure and file structure.It also defines rules to validate and manipulate this data.

Database management system are setup on specific data handling concepts,as the practice of administrating a database evolves. The earliest database only handled individual single pieces of specially formatted data.Over time, the models for database management  systems have changed considerably.

The earliest types of database management systems consisted mainly of hierarchy and network models.

However over time these models became overtaken by something called a relational database.In this relational database model individual components have attributes that are linked to their identities through a database table design.The rows and columns of an individuals database table include those identities and attributes in such a way that traditional structured query language or SQL can be used to pull various kinds of information on these relations models.