Welcome to the SQL Queries,Constraints and Triggers MCQs Page

Dive deep into the fascinating world of SQL Queries,Constraints and Triggers with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of SQL Queries,Constraints and Triggers, a crucial aspect of DBMS. In this section, you will encounter a diverse range of MCQs that cover various aspects of SQL Queries,Constraints and Triggers, 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 Queries,Constraints and Triggers. 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 Queries,Constraints and Triggers. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

SQL Queries,Constraints and Triggers MCQs | Page 4 of 17

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Advanced SQL

Q31.

SELECT * FROM employee WHERE dept_name="Comp Sci";

In the SQL given above there is an error . Identify the error .

Dept_name

Employee

“Comp Sci”

From

Discuss

Answer: (c).“Comp Sci”

Q32.

Which one of the following has to be added into the blank to select the dept_name which has Computer Science as its ending string ?

SELECT emp_name
FROM department
WHERE dept_name LIKE ’ _____ Computer Science’;

Discuss

Answer: (a).%

Q33.

’_ _ _ ’ matches any string of ______ three characters. ’_ _ _ %’ matches any string of at ______ three characters.

Atleast, Exactly

Exactly, Atleast

Atleast, All

All , Exactly

Discuss

Answer: (b).Exactly, Atleast

Q34.

By default, the order by clause lists items in ______ order.

SELECT name
FROM instructor
WHERE dept name = ’Physics’
ORDER BY name;

Descending

Any

Same

Ascending

Discuss

Answer: (d).Ascending

Q35.

To display the salary from greater to smaller and name in ascending order which of the following options should be used ?

SELECT *
FROM instructor
ORDER BY salary ____, name ___;

Ascending, Descending

Asc, Desc

Desc, Asc

Descending, Ascending

Discuss

Answer: (c).Desc, Asc

Q36.

This query can be replaced by which of the following ?

SELECT name
FROM instructor
WHERE salary <= 100000 AND salary >= 90000;

SELECT name
FROM instructor
WHERE salary BETWEEN 90000 AND 100000;

SELECT name
FROM employee
WHERE salary <= 90000 AND salary>=100000;

SELECT name
FROM employee
WHERE salary BETWEEN 90000 AND 100000;

SELECT name
FROM instructor
WHERE salary BETWEEN 100000 AND 90000;

Discuss

Answer: (a).SELECT name
FROM instructor
WHERE salary BETWEEN 90000 AND 100000;

Q37.

This query does which of the following operation?

SELECT instructor.*
FROM instructor, teaches
WHERE instructor.ID= teaches.ID;

All attributes of instructor and teaches are selected

All attributes of instructor are selected on the given condition

All attributes of teaches are selected on given condition

Only the some attributes from instructed and teaches are selected

Discuss

Answer: (b).All attributes of instructor are selected on the given condition

Q38.

In SQL the spaces at the end of the string are removed by _______ function .

Upper

String

Trim

Lower

Discuss

Answer: (c).Trim

Q39.

_____ operator is used for appending two strings.

Discuss

Answer: (c).||

Q40.

The union operation is represented by

∩

–

Discuss

Answer: (b).U

Page 4 of 17

Welcome to the SQL Queries,Constraints and Triggers MCQs Page

SQL Queries,Constraints and Triggers MCQs | Page 4 of 17

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

SQL

Data Warehousing and Data Mining

RDBMS

Advanced SQL

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