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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.

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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 5 of 17

Q41.
The intersection operator is used to get the _____ tuples.
Discuss
Answer: (b).Common
Q42.
The union operation automatically __________, unlike the select clause.
Discuss
Answer: (d).Eliminates duplicate
Q43.
If we want to retain all duplicates, we must write ________ in place of union.
Discuss
Answer: (a).Union all
Q44.
This query displays
(SELECT course id
FROM SECTION
WHERE semester = ’Fall’ AND YEAR= 2009)
EXCEPT
(SELECT course id
FROM SECTION
WHERE semester = ’Spring’ AND YEAR= 2010);
Discuss
Answer: (d).Tuples from first part which do not have second part
Q45.
For like predicate which of the following is true.

i) % matches zero OF more characters.
ii) _ matches exactly one CHARACTER.
Discuss
Answer: (a).i-only
Q46.
The number of attributes in relation is called as its
Discuss
Answer: (b).Degree
Q47.
_____ clause is an additional filter that is applied to the result.
Discuss
Answer: (c).Having
Q48.
_________ joins are SQL server default
Discuss
Answer: (b).Inner
Q49.
The _____________ is essentially used to search for patterns in target string.
Discuss
Answer: (a).Like Predicate
Q50.
A _____ indicates an absent value that may exist but be unknown or that may not exist at all.
Discuss
Answer: (c).Null value
Page 5 of 17

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