What Is a Database? A Complete Beginner's Guide to Database Management Systems (DBMS) and Database Software part 1

What Is a Database? A Complete Beginner's Guide to Database Management Systems (DBMS) and Database Software 

Introduction:

In the era of digital conversion, almost in every field like website, mobile application, business, school, hospital, and bank depends on a database. Every time when we need to create an account on a website, or we need to send a message, purchase a product online or check your exam result. Your information is stored and managed inside a database.

As long as technology continues to grow, the amount of digital information is increasing day by day. Managing these type of vast Information manually has become almost impossible. That is why databases have become one of the most important technologies in the field of computer science and information technology.

Whether you want to become a software developer, web developer, data analyst or cyber security expert, understanding of the databases is an essential skill for you. In this article you will learn about what a database is, why it is important for every field? The role of a database management system, about different types of databases and the most popular software that are used to manage them. 

What is a database?

“A database is an organized collection of related information that is stored electronically in a computer so that it can be accessed, updated, searched and managed easily and efficiently.”

As compared to other ordinary files or notebooks, a database stores information in a structured format that makes it easy and convenient to retrieve specific form of records within seconds.

For example, a university database may contain:

1.    Student names

2.    Registration number

3.    Course details of students

4.    Attendance records of students

5.    Examination results of every student

6.    Fee information of every student

In contrast of searching through hundreds of paper files, a database allows users to find the required information instantly and quickly.

Simple definition

“A database is an organized digital storage system that helps users to store, retrieve, update and manage information very easily.”

Why are databases important?

Just imagine for a few second a bank storing millions of customer records in notebooks. It is very difficult to find out one customers account. It would take hours.

A database solves this problem by organizing information properly in a structure form.

Some principal benefits include:

1.    Fast access to the required information

2.    Better organization of records

3.    Reduction of duplicate data

4.    Improved data security

5.    Easy updating and editing

6.    It gives backup and recovery options

7.    Multi user access option

8.    Better decision making 

These principal factors make databases an essential and important part of almost every modern organization. 

Examples of Databases We Use that Every Day

Most of the times people use databases without realizing it. Some conventional examples include:

Social media

Social media platforms like Facebook, Instagram and X store:

· Profiles of user

· Photographs of user

· Videos

· Comments of every post

· Messages of user

· Followers

Inside a database. 

Online shopping

Online shopping platforms or websites store:

·       Details of every product

·       Details of every customer account

·       Order details

·       Payment records of every order

·       Delivery information

By using databases.

Banking

Every bank uses databases to manage:

·       Customer accounts detail

·       Detail of ATM transactions

·       Long records of every person

·       Credit cards detail

·       Account balances

With full security and accuracy.

Educational institutions

In schools and universities, databases are also widely used for:

·       Student registration records

·       Attendance record

·       Examination results handling

·       Timetables

·       Library records

Hospitals:

Hospitals maintain databases for:

·       Handling or maintaining patient records

·       To maintain a medical history of a patient

·       To manage the laboratory reports

·       Handle appointments

·       Medicine records

What is a database Management System (DBMS)?

A Database Management System (DBMS) is a system software that allows the user to interact create, organize, maintain, and control the databases easily and accurately.

Instead of working directly with stored data users interact with DBMS. And the DBMS manages everything behind the scenes efficiently. You can assume it as a bridge between user and the database.  It serves as an interface and manage resources.

A DBMS executes many important tasks:

·       It create databases

·       Stores information

·       Update records

·       Searching data

·       Deletions of unnecessary records

·       Controlling the user access

·       Protection of data

·       Creating backup

·       Recovering lost information.

Without a DBMS, the managements of large amount of information would be exceedingly difficult.

Main functions of our DBMS

1.     Data Storage

A DBMS has an ability to store all types of data in well-organized form. Which makes it easier to store, manage, and access information whenever and wherever it is required.

2.     Data Retrieval

It allows users to perform quick searches and retrievals of required information from databases by using simple queries.

3.     Data Manipulation

A DBMS also allow the users to add new records, update the existing information and delete unnecessary data while keeping the original database safe and accurate.

4.     Security 

It also protects the sensitive information by allowing only authorized users to access or modify the database with the use of passwords or other user options.

5.     Backup and recovery

 A DBMS also creates backups of important data and records. It helps to restore database if it is accidentally deleted, corrupted or lost due hardware for software failure. It is an important feature of every DBMS which makes it useful at an organizational level.

6.     Multi-user Access  

It also facilities multiple users to access and work on the same database at the same time. While preventing data conflicts and maintaining consistency. It reduces the need of extra software and hardware for every person.

Popular database software

There are also several database systems that are used all around the world. Every system is designed for different and specific purpose.

MySQL

My SQL is one of the world’s most popular and open source relational database system. It is stands for my Structured Query Language. It is widely used for:

·       1.    Websites

·       2.    Blogs

·       3.    E-commerce

·       4.    Content Management Systems

It is also best for:

·      1.    Beginners

·      2.    Students

·      3.     Small and medium businesses

·      4.    Web development

PostgreSQL

PostgreSQL is also an advanced and open source database which is known for reliability and powerful features. It is commonly used in:

·      1. For the development of large web applications

·      2. To maintain financial systems

·      3. In most of government projects

·      4. In research organizations

Oracle Database

Oracle Database is an enterprise-level database system that are basically used by the large organizations. It is good in handling a large amount of data. It provides:

·      1. High security of data

·      2. Excellent performance

·      3. Large storage capacity of data

·      4. Advanced database management tools

It is commonly used by the banks, multinational companies and government departments.

Microsoft SQL Server

Microsoft SQL Server is a Microsoft professional database management system. It is basically integrates well with windows based business application. And it is commonly used in:

·     1.  Business software

·     2.  ERP systems (Enterprise Resource Planning system)

·     3.  Healthcare

·     4.  And in Education

MongoDB

MongoDB is one of the most popular NoSQL database. It is best for the development of modern software.

Unlike other traditional relational databases i.e. MySQL or PostgreSQL that store data in tables, rows, and columns, But MongoDB stores data in flexible documents.  

It is ideal for:

·      1. The development of mobile apps

·      2. Cloud applications

·      3. Big Data handling

·      4. AI projects

·       Real time applications

SQLite

SQLite is a lightweight and high performance database which can be stored inside a single file in a computer. It is also an open source database engine. It can run directly inside an application rather than as a separate server processor.  It is world widely considered as the most used database. It is powering millions of mobile apps, desktop software, web browsers, and embedded systems.

It is widely used in:

·    1.   Android applications

·    2.   Mobile software

·    3.   Embedded systems

·    4.  Desktop applications

Because it doesn’t require a separate server, so it is perfect for beginners and smaller projects.

Click here for part 2: What Is a Database? A Complete Beginner's Guide to Database Management Systems (DBMS) and Database Software part 2