A database is a collection of related data which represents some aspect of the real world. A database system is designed to be built and populated with data for a certain task.
Database Management System (DBMS) is a software for storing and retrieving users’ data while considering appropriate security measures. It consists of a group of programs which manipulate the database. The DBMS accepts the request for data from an application and instructs the operating system to provide the specific data. In large systems, a DBMS helps users and other third-party software to store and retrieve data.
DBMS allows users to create their own databases as per their requirement. The term “DBMS” includes the user of the database and other application programs. It provides an interface between the data and the software application.
Let us see a simple example of a university database. This database is maintaining information concerning students, courses, and grades in a university environment. The database is organized as five files:
Lec-2: Introduction to DBMS (Database Management System) With Real life examples | What is DBMS
Types of Database Management Systems
There are four types of database management systems. These are:
A hierarchal database is a common one that uses a tree-like tier structure to create relationships between different data points. Its hierarchal because data is structured in a parent-child fashion where one account (the parent) has dependent accounts (child accounts).
In this model, a parent account can have multiple child accounts, but the child account can only ever have one parent account.
In a network model DBMS, you also model records based on parent-child relationships. However, a child account can have multiple parent relationships. This type of database addresses data storage with more complicated relationships like “many-to-many” relationships where several accounts are linked to several other accounts.
In an object-oriented database, data is stored as objects. It is structured with classes that show what data is being held. These databases are useful for reducing the amount of data maintenance required and improved reliability and flexibility to sustain growth.
The relational model is one of the easiest, and as a result, it is widely used. In a relational model, normalized data is stored and edited in tables, and is managed using SQL programming language.
What does a DBMS do?
The three primary management functions of DBMS are supporting processes that can be applied to data, for instance, modification, maintaining the databases logic structure and managing the storage of information inside the database. DBMS can be used to stay in data compliance with regulatory organizations, as part of a disaster recovery plan (for example, facilitating the off-site storage of data) or to perform performance monitoring, to name a few common enterprise uses.
A DBMS has several important components:
Benefits of DBMS
There are many benefits to implementing a DBMS, these include:
If data has integrity, its accurate and consistent. There can be multiple databases in a DBMS, so the integrity of data across the application is important. When information is consistent across databases, end users can use it to their advantage. Also, quick access to data provides management with the information to make real-time decisions, but only data with high integrity can be deemed useful for that purpose. Data integrity is of high importance to digital businesses and DBMS help keep data useful by ensuring its integrity.
Security and privacy
Because data is so important, security and privacy are among the top concerns for businesses. Data security refers to the process of ensuring only authorized users have access to data. Database professionals ensure security by making sure users undergo an authentication process each time they log on. This is an inherent part of a DBMS. Privacy can also be achieved by honoring an authentication process.
A database management system ensures recovery and backup. Individuals arent required to backup data, manually, and on a scheduled basis. Instead, this feature is inherent in the DBMS. Having consistent backups of important data is a vital part of a disaster recovery plan. This, along with features like cloud storage, allow users to access data everywhere, even when they cant get into the office due to disaster, or if servers are unreachable.
Redundancy is a problem for database administrators because redundant files take up space and may not contain the most updated information. By centralizing multiple databases with a DBMS, management of all data takes place from one location. This reduces the likelihood of redundancy and makes all data easier to manage and update.
Data sharing and access
Database management systems are resources that allow multiple people to access the same data from multiple locations at one time. Data sharing also occurs between authorized members. Levels of authorization can ensure that data privacy is maintained at the user level and only certain people have access to certain pieces of data.
Database management systems let you use the same data across all applications that are integrated into the system. This allows for greater consistency throughout the organization. With less redundancy, theres less of a chance data will appear differently between users making for a highly consistent database experience where changes are immediately reflected across all platforms accessing the data.
What is mean by DBMS?
What are the 4 types of DBMS?
- hierarchical database systems.
- network database systems.
- object-oriented database systems.
What is DBMS and its functions?
What is database and DBMS?