Database Systems Tutorials

What is database?

“Database is an organized collection of related data”. Database can contains one or more tables. Table have proper database schemas. Different SQL queries are performed on data to generate the useful reports. Reports are technically called views. Database can be managed by Database Management System DBMS. All the tables in database are fully normalized to reduce the anomalies within data and to convert the data base from complex to simple one. Keys are used to uniquely identifies the rows within database.

Examples of database are phone directory in your mobile phone, Database of library, Database of a college, Database of citizens of USA etc.

What is data? 

Data is collection of raw figures and raw facts. Data can consist of text, character, images, audio or video etc. Data plays a key role for any organization because data is processed by data mining to take the big decision about your organization. Data is very expensive. You can notice that many of the social networks provides you free services. Why when there is nothing free in this world? Yes because many social networks keep record of your activities and then these social networks know more about you and you know less about you. After that many of the social networks sell your data to advertisement companies. Advertisement companies show you ads related to you when you login the internet.

What is Information?

Processed form of data is an information. For example we can give the data to the CPU in the form of input. CPU process the data and then CPU gives us the output in the form of information. The only purpose to store the data is to get the useful information from the data. In database processing on the data and in the CPU is done when someone put the SQL query. 

data information

What is DBMS?

DBMS is the database management system. DBMS is used to created and manipulate the database. Some common examples of DBMS are Mysql, Microsoft access, Oracle, SQL server etc.


Hopefully now you can answer the following questions;

  • What is database?
  • What is data?
  • What is information?
  • What is database management system?
  • What  are examples of database management systems?