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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.

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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 11 of 38

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Q101.
How many tables may be included with a join?

a.

One

b.

Two

c.

Three

d.

All of the above.

Discuss
Answer: (d).All of the above.
Q102.
Which of the following is one of the basic approaches for joining tables?

a.

Subqueries

b.

Union Join

c.

Natural join

d.

All of the above

Discuss
Answer: (d).All of the above
Q103.
Which of the following statements is true concerning subqueries?

a.

Involves the use of an inner and outer query.

b.

Cannot return the same result as a query that is not a subquery.

c.

Does not start with the word SELECT.

d.

All of the above.

Discuss
Answer: (a).Involves the use of an inner and outer query.
Q104.
Which of the following is a correlated subquery?

a.

Uses the result of an inner query to determine the processing of an outer query.

b.

Uses the result of an outer query to determine the processing of an inner query.

c.

Uses the result of an inner query to determine the processing of an inner query.

d.

Uses the result of an outer query to determine the processing of an outer query.

Discuss
Answer: (b).Uses the result of an outer query to determine the processing of an inner query.
Q105.
A UNION query is which of the following?

a.

Combines the output from no more than two queries and must include the same number of columns.

b.

Combines the output from no more than two queries and does not include the same number of columns.

c.

Combines the output from multiple queries and must include the same number of columns.

d.

Combines the output from multiple queries and does not include the same number of columns.

Discuss
Answer: (c).Combines the output from multiple queries and must include the same number of columns.
Q106.
Which of the following is true concerning triggers?

a.

You do not create them with SQL.

b.

They execute against only some applications that access a database.

c.

They have an event, condition, and action.

d.

They cannot cascade (cause another trigger to fire).

Discuss
Answer: (c).They have an event, condition, and action.
Q107.
Which of the following is true concerning a procedure?

a.

You do not create them with SQL.

b.

They do not need to have a unique name.

c.

They include procedural and SQL statements.

d.

They are the same thing as a function.

Discuss
Answer: (c).They include procedural and SQL statements.
Q108.
Which of the following is true concerning systems information in an RDBMS?

a.

RDBMS store database definition information in system-created tables.

b.

This information can be accessed using SQL.

c.

This information often cannot be updated by a user.

d.

All of the above.

Discuss
Answer: (d).All of the above.
Q109.
A CASE SQL statement is which of the following?

a.

A way to establish an IF-THEN-ELSE in SQL.

b.

A way to establish a loop in SQL.

c.

A way to establish a data definition in SQL.

d.

All of the above.

Discuss
Answer: (a).A way to establish an IF-THEN-ELSE in SQL.
Q110.
In SQL, which command is used to make permanent changes made by statements issue since the beginning of a transaction?

a.

ZIP

b.

PACK

c.

COMMIT

d.

SAVE

Discuss
Answer: (c).COMMIT
Page 11 of 38

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