Before understanding the Database Management System, it is important to understand what a database is. So the database is a collection of data that is interrelated with each other. The database organizes the data in the form of schemas, tables, and views. A database is created and maintained to retrieve the data efficiently and effectively. Database Management is software that is used to manage all the databases. This software system acts as an interface and provides security and consistency to the user while using the databases. A good commercial Database Management system has inbuilt support for data backup and recovery. Some of the most common database Management systems are Oracle, SQL, MySQL, etc.
Traditionally, people used to store the data in files, but it wasn't easy to store, retrieve and maintain it after some point. Now the Database and Database Management System came into the picture with advanced and easy-to-use features to overcome the problems of the traditional system. Some special characteristics of the modern Database Management System which make it more attractive and useful in comparison to traditional systems are given below:
Talking about the applications of Database Management System, it is used everywhere and in every software, be it in school record maintenance system, office portal maintenance, or any e-commerce application for keeping track of every user using the application, storing, and retrieving the data. Moreover, any software application with the features of accessing and storing the data requires consistency, relation-based tables, less redundancy, security, ACID properties, and data isolation for different users requires a database.
Consider a scenario of a college record maintenance system that records every student, faculty, subject, and course provided. We need a separate table/ record for each entity and maintain the relationship between these entities. For example, one student can have single or multiple subjects, and one course can have different subjects. Likewise, there should be one record keeping track of personal details of students like name, address, father’s phone number, etc. Moreover, records of each semester of a student are stored in a separate table. A strong Database Management system is needed to maintain, store and retrieve these complex interrelated relations.
Before proceeding with the Database Management tutorial, one should know advanced computer concepts like memory management, security, and primary and secondary memory. Apart from this, it is important to understand real data and its related concepts, like why it is important to maintain and store it efficiently.
Any person in the computer science field should at least have a basic knowledge of Database Management System and how it works. In the software industry, there is a separate designation of Database Manager dealing with creating and maintaining databases. Database Management post is in high demand these days. Those interested in this field should learn and understand each advanced concept.