EduRev

Open App

SSC CGL Exam > SSC CGL Videos > Computer Awareness and Proficiency > Database Concepts and Types of Keys

Database Concepts and Types of Keys Video Lecture | Computer Awareness and Proficiency - SSC CGL

	Computer Awareness and Proficiency 48 videos\|22 docs\|33 tests

Computer Awareness and Proficiency

48 videos|22 docs|33 tests

Join Course for Free

Top Courses for SSC CGL

View all

FAQs on Database Concepts and Types of Keys Video Lecture - Computer Awareness and Proficiency - SSC CGL

1. What are the different types of keys in a database?

Ans. In a database, there are several types of keys such as primary key, foreign key, candidate key, super key, and composite key.

2. What is the primary key in a database?

Ans. The primary key is a unique identifier for each record in a database table. It ensures that each row in the table is uniquely identified and helps maintain the integrity of the data.

3. How is a foreign key different from a primary key?

Ans. A foreign key is a field in a database table that is used to establish a relationship with another table. It is not necessarily unique, unlike a primary key. The foreign key helps maintain referential integrity between the tables.

4. What is a composite key in a database?

Ans. A composite key is a combination of two or more columns in a table that together uniquely identify each record. It is used when a single column cannot uniquely identify a record, so a combination of columns is used as the key.

5. How does a super key differ from a candidate key?

Ans. A super key is a set of one or more columns that can uniquely identify each record in a table, while a candidate key is a minimal super key - the smallest set of columns that can uniquely identify each record. In other words, a candidate key is a super key without any unnecessary columns.

Related Exams

SSC CGL

About this Video

	4.60/5 Rating
	Dec 22, 2024 Last updated

Video Description: Database Concepts and Types of Keys for SSC CGL 2024 is part of Computer Awareness and Proficiency preparation. The notes and questions for Database Concepts and Types of Keys have been prepared according to the SSC CGL exam syllabus. Information about Database Concepts and Types of Keys covers all important topics for SSC CGL 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Database Concepts and Types of Keys.

Introduction of Database Concepts and Types of Keys in English is available as part of our Computer Awareness and Proficiency for SSC CGL & Database Concepts and Types of Keys in Hindi for Computer Awareness and Proficiency course. Download more important topics related with notes, lectures and mock test series for SSC CGL Exam by signing up for free.

Description

Video Lecture & Questions for Database Concepts and Types of Keys Video Lecture | Computer Awareness and Proficiency - SSC CGL - SSC CGL full syllabus preparation | Free video for SSC CGL exam to prepare for Computer Awareness and Proficiency.

Information about Database Concepts and Types of Keys

Here you can find the meaning of Database Concepts and Types of Keys defined & explained in the simplest way possible. Besides explaining types of Database Concepts and Types of Keys theory, EduRev gives you an ample number of questions to practice Database Concepts and Types of Keys tests, examples and also practice SSC CGL tests.

	Computer Awareness and Proficiency 48 videos\|22 docs\|33 tests

Computer Awareness and Proficiency

48 videos|22 docs|33 tests

Join Course for Free

Explore Courses for SSC CGL exam

Signup for Free!

Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.

Start learning for Free

10M+ students study on EduRev

Sample Paper

mock tests for examination