Welcome to the SQL MCQs Page

Dive deep into the fascinating world of SQL with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of SQL, a crucial aspect of DBMS. In this section, you will encounter a diverse range of MCQs that cover various aspects of SQL, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within DBMS.

Check out the MCQs below to embark on an enriching journey through SQL. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of DBMS.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of SQL. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

SQL MCQs | Page 32 of 38

Explore more Topics under DBMS

01

DBMS Basics

02

Data Models

03

The Entity Relationship Approach

04

Relational Databases

05

Data Storage and Querying

06

Relational Algebra

07

Normalization

08

Storage and File Structures

09

Indexing and Hashing

10

Transactions

11

Concurrency Control

12

Recovery System

13

Distributed Databases

14

Data Warehousing and Data Mining

15

RDBMS

16

Advanced SQL

17

SQL Queries,Constraints and Triggers

Q311.

The clause used in CREATE TABLE statement in SQL to specify secondary keys is called

STAMPED clause

UNIQUE clause

SECOND clause

FIRST clause

Discuss

Answer: (b).UNIQUE clause

Q312.

The possible actions of altering the tables in Standard Query Language includes

adding or dropping constraints

adding or dropping attributes

change definition o columns

all of above

Discuss

Answer: (d).all of above

Q313.

The type of bit strings which is preceded by 'B' and is placed between single quotes is classified as

double bit string

nested bit string

fixed bit string

literal bit strings

Discuss

Answer: (d).literal bit strings

Q314.

In CREATE TABLE SQL command, each table must have atleast column/s

Discuss

Answer: (d).1

Q315.

Which of the following information does an SQL DDL not specify?

The schema for each relation

The integrity constraints

The operations on the tuples

The security and authorization information for each relation

Discuss

Answer: (c).The operations on the tuples

Q316.

Which of the following data types does the SQL standard not support?

char(n)

String(n)

varchar(n)

float(n)

Discuss

Answer: (b).String(n)

Q317.

Which command is used to create a new relation in SQL

create table( , …)

create relation( , …)

new table( , …)

new relation( , …)

Discuss

Answer: (a).create table( , …)

Q318.

If a1, a2, a3 are attributes in a relation and S is another relation, which of the following is an incorrect specification of an integrity constraint?

primary key(a1, a2, a3)

primary key(a1)

foreign key(a1, a2) references S

foreign key(a1, a2)

Discuss

Answer: (d).foreign key(a1, a2)

Q319.

What is the syntax to load data into the database? (Consider D as the database and a, b, c as data)

enter into D (a, b, c);

insert into D values (a, b, c);

insert into D (a, b, c);

insert (a, b, c) values into D;

Discuss

Answer: (b).insert into D values (a, b, c);

Q320.

Which of the following commands do we use to delete a relation (R) from a database?

drop table R

drop relation R

delete table R

delete from R

Discuss

Answer: (a).drop table R

Page 32 of 38

Welcome to the SQL MCQs Page

SQL MCQs | Page 32 of 38

Explore more Topics under DBMS

DBMS Basics

Data Models

The Entity Relationship Approach

Relational Databases

Data Storage and Querying

Relational Algebra

Normalization

Storage and File Structures

Indexing and Hashing

Transactions

Concurrency Control

Recovery System

Distributed Databases

Data Warehousing and Data Mining

RDBMS

Advanced SQL

SQL Queries,Constraints and Triggers

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