Database is a collection of organized data for easy management. It contains structured data arranged in a particular shape, such as data about universities, railways, and airports. Relational databases store and provide access to data points that are related to each other through tables with unique keys and attributes in each column. The database model defines standards for how the data is stored, such as hierarchical models that arrange records in a tree-like structure similar to an organization chart.

1. What is Database
Database is collection of information
organized for easy management and
maintenance.
means that where is a lot of data and
related data means related to companies’
name and other department.

2. Structure of data
• Structured data is that which is stored in particular
structured or particular shape.
• Example:-
• University, Railway, Airport.

3. Relational Data base
• It is a type of data base that store and provide access
to data point that are relative each other.
1. Base on relation model(data in table)
2. Each row in table with (unique key)
3. Colum of table hold attribute of data

4. • A set of rules and standard that define how the data
base store data is called Data base model

6. Hierarchical Model
Hierarchical Model
The Hierarchical Model arrange records I Hierarchical
like an organization chart.
2. Hierarchical DBMSs were popular from the late
1969s, with the introduction of IBM’s Information
Management System (IMS) DBMS, through the 197