Define the terms Data abstraction and Data redundancy

Data abstraction Abstraction means “hiding”. In Data Base Management System (DBMS), Data abstraction is the process of providing a simplified interface to a more complex system, while hiding the underlying implementation details. It involves separating the essential features of a system from the non-essential details and representing the essential features in a way that is … Read more

Role of DBA in database management system

A database administrator (DBA) plays a crucial role in the management of a database management system (DBMS). The DBA is responsible for the overall design, implementation, maintenance, and security of the database. A database administrator (DBA) is responsible for managing the performance, integrity, and security of a database. Some role of the DBA are The … Read more

Difference between procedural and non-procedural DMLs

Procedural Data Manipulation Language (DML) and non-procedural DML are two different types of DMLs that are used to manipulate data in a database. Procedural DML Procedural DMLs (Data Manipulation Language) are a type of programming language that allows users to specify a series of actions to be taken on a database. These actions are often … Read more

What is the Database Language? Explain DML and DDL.

Database languages are specialized programming languages that are used to communicate with and manipulate databases. There are two main categories of database languages: data definition languages (DDL) and data manipulation languages (DML). In other words, a database language is a programming language that is used to create, modify and maintain the structure and content of … Read more

What is data independence? Difference between logical and physical data independence

Data independence is also called Data abstraction. In the 3-level architecture of D.B.M.S, we see the purpose of all three levels of architecture. In data independence, we discuss the use of these levels. Data independence is the concept of making data independent from the users. The basic aim of the user is to access data, … Read more

Logical and Physical schemas in DBMS

The objective of database schema is to recognize different tables and fields of each table. Schema also describes how the relationship is established between tables. This helps to identify constraints in the system. The subschema is a subset of the schema and the subschema inherits the same property as the schema. The schema can be … Read more

Three-level Architecture of the Database System

Ans: Three-level architecture in DBMS is a very important and hot topic. The three-level architecture shows the working and roles of different users at different levels of the database. How database architecture is divided into levels, and what things are going through at each level. The three-level architecture of the database system is as follows … Read more

How a category differ from regular shared subclass in dbms?

Category and shared subclass both are different terms. Their concepts are separate fields from each other. The category contains two or more superclasses which may represent different-different entity types, while other regular shared subclasses always have a single superclass. An entity that is a member of the shared subclass must exist in all superclasses, but … Read more