Introduction to DBMS

What is Data?

Data is a collection of raw, unorganized facts and details like text, observations, figures, symbols, and descriptions of things etc.

Data can be recorded and doesn’t have any meaning unless processed.

Types of Data

There are two types of Data:-

1. Quantitative: Quantitative data refers to numerical information like weight, height, etc.
2. Qualitative: Qualitative data refers to non-numeric information like opinions, perceptions, etc.

What is Information?

Information is defined as structured, organized, and processed data, presented within a context that makes it relevant and useful to the person who needs it.

Data vs Information

• Data is a collection of facts, while information puts those facts into context.

• While data is raw and unorganized, information is organized.

• Data points are individual and sometimes unrelated. Information maps out that data to provide a big-picture view of how it all fits together.

• Data, on its own, is meaningless. When it’s analyzed and interpreted, it becomes meaningful information.

• Data does not depend on information; however, information depends on data.

• Data isn’t sufficient for decision-making, but you can make decisions based on information.

What is a Database?

Database is an electronic place/system where data is stored in a way that it can be easily accessed, managed, and updated.

What is DBMS?

A database management system (DBMS) is a software system for creating and managing databases. A DBMS enables end users to create, protect, read, update and delete data in a database.

DBMS vs File Systems