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 34 of 38

Explore more Topics under DBMS

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DBMS Basics

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Relational Databases

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Relational Algebra

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Storage and File Structures

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Indexing and Hashing

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Transactions

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Concurrency Control

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Recovery System

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Distributed Databases

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Data Warehousing and Data Mining

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RDBMS

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Advanced SQL

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SQL Queries,Constraints and Triggers

Q331.

If we specify multiple relations in the from clause and do not specify any conditions in the where clause, what will the result be?

The natural join of both the relations

The left outer join of both the relations

A syntactical error

The Cartesian product of both the relations

Discuss

Answer: (d).The Cartesian product of both the relations

Q332.

State true or false: Multiple conditions in the where clause are separated by a “,”

True

False

May be

Can't say

Discuss

Answer: (b).False

Q333.

What does the natural join operation do?

It considers only those pairs of tuples that have the same value on those attributes that appear in the schemas of both relations

It considers only those pairs of tuples that have the same value on at least one of the attributes that appear in the schemas of both the relations

It considers only those pairs of tuples that do not have the same value on those attributes that appear in the schemas of both relations

None of the mentioned

Discuss

Answer: (a).It considers only those pairs of tuples that have the same value on those attributes that appear in the schemas of both relations

Q334.

Observe the following query and choose the correct option.
select name, ID

from student natural join department natural join section

The query is syntactically wrong because there is no where clause

The query is syntactically wrong because there are more than one attributes in the select clause

The query is syntactically wrong because more than one relations are included in the natural join operation

The query is correct

Discuss

Answer: (d).The query is correct

Q335.

Which keyword is used to rename a relation in a query?

rename

Discuss

Answer: (b).as

Q336.

While operating with strings, what does “_ _ _%” match with?

A string of three letters

A string of at least three letters

A string of three words

A string of at least three words

Discuss

Answer: (a).A string of three letters

Q337.

What is the function of the union operation?

It combines the results of any two different queries

It combines the results of two different queries which have the same set of attributes in the select clause

It combines the results of two different queries which have the same condition in the where clause

It gives the Cartesian product of the results of any 2 queries

Discuss

Answer: (b).It combines the results of two different queries which have the same set of attributes in the select clause

Q338.

What is the function of the intersect operation?

It returns the intersection of the results of the results of any two different queries

It returns the intersection of the results of two different queries which have the same set of attributes in the select clause

It returns the intersection of the results of two different queries which have the same condition in the where clause

None of the mentioned

Discuss

Answer: (b).It returns the intersection of the results of two different queries which have the same set of attributes in the select clause

Q339.

What is the function of the except operation?

It excludes all the results present in both the queries

It includes the results of the second query but excludes the results of the first query

It includes the results of the first query but excludes the results of the second query

It includes all the results of both queries but removes duplicates

Discuss

Answer: (c).It includes the results of the first query but excludes the results of the second query

Q340.

When does the predicate is null succeed?

If the value on which it is applied is finite

If the value on which it is applied is invalid

If the value on which it is applied is blank

If the value on which it is applied is more than the allowed limit

Discuss

Answer: (c).If the value on which it is applied is blank

Page 34 of 38

Welcome to the SQL MCQs Page

SQL MCQs | Page 34 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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