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What is a Database?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. In this Database Management System tutorial tutorial, you will learn DBMS concepts like- Example of a DBMSLet 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:
To define DBMS:
History of DBMS
Here are the characteristics and properties of Database Management System:
DBMS vs. Flat File
Users of DBMSFollowing are the various category of users of DBMS
Popular DBMS SoftwareHere, is the list of some popular DBMS system:
Below are the popular database system applications:
Types of DBMS Tha main Four Types of Database Management System are:
Hierarchical DBMSIn a Hierarchical database, model data is organized in a tree-like structure. Data is Stored Hierarchically (top down or bottom up) format. Data is represented using a parent-child relationship. In Hierarchical DBMS parent may have many children, but children have only one parent. Network ModelThe network database model allows each child to have multiple parents. It helps you to address the need to model more complex relationships like as the orders/parts many-to-many relationship. In this model, entities are organized in a graph which can be accessed through several paths. Relational ModelRelational DBMS is the most widely used DBMS model because it is one of the easiest. This model is based on normalizing data in the rows and columns of the tables. Relational model stored in fixed structures and manipulated using SQL. Object-Oriented ModelIn Object-oriented Model data stored in the form of objects. The structure which is called classes which display data within it. It is one of the components of DBMS that defines a database as a collection of objects which stores both data members values and operations. Advantages of DBMS
Disadvantage of DBMSDBMS may offer plenty of advantages but, it has certain flaws-
When not to use a DBMS system?Although, DBMS system is useful. It is still not suited for specific task mentioned below: Not recommended when you do not have the budget or the expertise to operate a DBMS. In such cases, Excel/CSV/Flat Files could do just fine. Summary
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