What is database system?

To understand a database system, you must first understand four basic definitions related to the database system.

• Data : Suppose you decided to create a Facebook account. You visited the Facebook website and tried to open a Facebook account. Facebook requires a lot of personal information such as your name, Dob, gender, mobile number or email address etc.
• All this information will be called as your personal data. So, the data is any fact that can be recorded.
• It can be in the form of audio, video, Image etc.

• Database : Let's try to understand the database with the example of Facebook.
• Once you provide all the information such as your name, mobile phone number, password, date of birth and gender, click on the signup button. So all of your personal information needs to be stored somewhere for future access when needed.
• Here a database comes into picture which is a collection of information that is organized so that it can be easily accessed, managed and updated when necessary.
• Data warehouse : This is the place where a large amount of data is stored that has been collected over a long period of time.
• If you talk about a company like Facebook, they have a lot of data warehouses so that more data can be collected. These data stored in warehouses are used to make decisions and recommend different things to users.

• Database Management System : Now suppose you want to change your mobile number that you provided when registering on Facebook.
• This will be possible with the help of a set of programs that will help in construction and manipulation of databases.

Hope this helps.

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