Check Constraint Basics Quiz

  • 12th Grade
Reviewed by Editorial Team
The ProProfs editorial team is comprised of experienced subject matter experts. They've collectively created over 10,000 quizzes and lessons, serving over 100 million users. Our team includes in-house content moderators and subject matter experts, as well as a global network of rigorously trained contributors. All adhere to our comprehensive editorial guidelines, ensuring the delivery of high-quality content.
Learn about Our Editorial Process
| By Thames
T
Thames
Community Contributor
Quizzes Created: 6575 | Total Attempts: 67,424
| Questions: 15 | Updated: May 2, 2026
Please wait...
Question 1 / 16
🏆 Rank #--
0 %
0/100
Score 0/100

1. What is a check constraint in a database?

Explanation

A check constraint is a database rule that enforces specific conditions on the values in a column. It ensures that any data entered meets predefined criteria, helping maintain data integrity by preventing invalid entries that do not satisfy the specified condition. This mechanism is essential for enforcing business logic within the database.

Submit
Please wait...
About This Quiz
Check Constraint Basics Quiz - Quiz

The Check Constraint Basics Quiz tests your understanding of database constraints, specifically check constraints that enforce data validation rules. This quiz covers how check constraints restrict values in database columns, their syntax, and practical applications. Master these fundamentals to write cleaner, more reliable database schemas.

2.

What first name or nickname would you like us to use?

You may optionally provide this to label your report, leaderboard, or certificate.

2. Which SQL keyword is used to define a check constraint?

Explanation

The CHECK keyword in SQL is used to define a check constraint, which ensures that all values in a column meet a specific condition. This helps maintain data integrity by restricting the values that can be inserted or updated in the database, allowing only those that satisfy the defined criteria.

Submit

3. A check constraint can reference multiple columns in the same table.

Explanation

A check constraint can enforce rules on multiple columns within a table, allowing for complex conditions that involve the values of those columns. This flexibility ensures data integrity by ensuring that the specified conditions are met across the referenced columns, enhancing the overall validation mechanisms within the database.

Submit

4. Which of the following is a valid check constraint for an age column?

Explanation

A valid check constraint ensures that the values in the age column meet specific criteria. The expression "CHECK (age > 0 AND age

Submit

5. A check constraint is enforced at the ______ level, preventing invalid data from being inserted.

Explanation

A check constraint is a rule applied at the database level that ensures only valid data entries are allowed in a table. By defining specific conditions that data must meet, it prevents the insertion of invalid or incorrect data, thereby maintaining data integrity within the database.

Submit

6. Which comparison operator cannot be used in a check constraint?

Explanation

In SQL, the "==" operator is not standard for comparison; instead, "=" is used for equality checks. Check constraints rely on standard SQL syntax, and using "==" would lead to syntax errors. Therefore, "==" cannot be used in a check constraint, while "!=" is valid for inequality.

Submit

7. Check constraints can reference columns from other tables in the database.

Explanation

Check constraints are used to enforce rules on the values in a single table's columns. They cannot reference columns from other tables, as their purpose is to validate data within the same table. This limitation ensures data integrity and consistency without relying on external data sources.

Submit

8. What happens when you try to insert data that violates a check constraint?

Explanation

When data violates a check constraint, the database management system enforces data integrity by preventing the insert operation. This ensures that only valid data that meets predefined conditions is stored, thus maintaining the accuracy and reliability of the database. As a result, an error is generated to inform the user of the violation.

Submit

9. Which logical operator can be used to combine multiple conditions in a check constraint?

Explanation

AND and OR are logical operators that allow for the combination of multiple conditions in a check constraint. Using AND ensures that all specified conditions must be true for the constraint to be satisfied, while OR allows for any of the conditions to be true, providing flexibility in data validation.

Submit

10. A check constraint named 'chk_salary' would be written as CHECK (salary > 0).

Explanation

A check constraint ensures that values in a column meet a specific condition. In this case, 'chk_salary' enforces that the 'salary' must be greater than 0, preventing negative or zero values. This maintains data integrity by ensuring only valid salary entries are allowed in the database.

Submit

11. Check constraints improve data ______ by preventing invalid entries at the database level.

Explanation

Constraints in a database enforce rules on the data entered, ensuring that only valid entries are accepted. This helps maintain data integrity, which refers to the accuracy and consistency of data over its lifecycle. By preventing invalid data from being stored, constraints safeguard the overall quality and reliability of the database.

Submit

12. Which of the following scenarios best demonstrates the use of a check constraint?

Explanation

A check constraint is used to enforce specific rules on data entries in a database. In this scenario, it ensures that any discount percentage entered falls within a valid range of 0 to 100, preventing invalid data that could lead to errors in calculations or business logic.

Submit

13. A check constraint can include built-in SQL functions like LENGTH() or UPPER().

Submit

14. When defining a check constraint, the condition must evaluate to either TRUE or ______.

Submit

15. Which statement best describes the relationship between check constraints and data validation?

Submit
×
Saved
Thank you for your feedback!
View My Results
Cancel
  • All
    All (15)
  • Unanswered
    Unanswered ()
  • Answered
    Answered ()
What is a check constraint in a database?
Which SQL keyword is used to define a check constraint?
A check constraint can reference multiple columns in the same table.
Which of the following is a valid check constraint for an age column?
A check constraint is enforced at the ______ level, preventing invalid...
Which comparison operator cannot be used in a check constraint?
Check constraints can reference columns from other tables in the...
What happens when you try to insert data that violates a check...
Which logical operator can be used to combine multiple conditions in a...
A check constraint named 'chk_salary' would be written as CHECK...
Check constraints improve data ______ by preventing invalid entries at...
Which of the following scenarios best demonstrates the use of a check...
A check constraint can include built-in SQL functions like LENGTH() or...
When defining a check constraint, the condition must evaluate to...
Which statement best describes the relationship between check...
play-Mute sad happy unanswered_answer up-hover down-hover success oval cancel Check box square blue
Alert!