What Relational Database Management System is all About ? What is RDBMS?

In this tutorial, we will discuss Relational Database Management Systems.

Let's first discuss What do databases do?

Databases have an ability to store a large amount of data. So when we search for any information on the internet then it finds all the URL's that meet the criteria. So far if you have been looking for a particular data or subject and type that in a web browser and click search then that's actually talking to a database.

When you use Twitter, all messages are stored and indexed by #tags and every time any tweet is sent it is stored in a database allows them to search them for information, with a particular information, with particular #tags.

We use PhotoBucket for uploading images on the internet and they have been linked to the user accounts. Other people can access those images as well and also other programs like Facebook, Messenger etc. Also, a lot of Google products are products of the database.

Databases are required to store a large amount of information quickly. So only information that has been streaming across the internet, there are databases out there. These databases are collecting that information.

Let's see what information they are collecting?

Well, they are actually collecting data. Data is the most important part of the database. The function of a database is to store data to allow efficient and effective retrieval of information. So the data is an individual piece of data information that is storing and trying to index, for future retrieval down the track. So this allows us to find the data like which students are there in 12th this year? or what is the percentage of each student in the particular class?

So when we look at the following data information :

Data

• 01232020

• 12233450

• 29384355

Above we can see a list of numbers. Thus this list of numbers is actually just stripped data but when we apply some meaning to it for ex: Account number of any client then it becomes important information. That means this list of number is for a particular record. Now records and fields are stored in a particular table or file. This is how a database stores information about one category like above where it stores information about Employees.

You could have another type of classes so you can have tables for Students or Classes or Teachers etc. A Relational Database management system helps to bring all those together.

Remember that Table should be for one particular entity i.e. for one particular entity or for a particular subject. So when we have multiple tables they help us in creating Relational Database Systems. The tables can be linked together and share all the information. So when we are looking for producing students timetable we can create Students, To find out which subjects, what teachers they have etc. So the role of the database is to effectively organize the data for the quick and speedy data retrieval.

We need to normalize the data to ensure that it is stored efficiently as it improves the users experience at the end.

example Table:

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