Practice Default Constraint (4.2.2.6) - Structured Query Language (SQL) - Part 1
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DEFAULT Constraint

Practice - DEFAULT Constraint

Learning

Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What is the purpose of the DEFAULT constraint?

💡 Hint: Think about how it helps in maintaining valid data.

Question 2 Easy

Write a SQL example using the DEFAULT constraint for a column named 'CreatedOn' with the current date.

💡 Hint: What function returns today's date?

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What does the DEFAULT constraint do in SQL?

A. Sets a column to allow NULL values
B. Provides a pre-defined value when one isn't supplied
C. Ensures a column is unique

💡 Hint: Think about how this feature might help with default values.

Question 2

TRUE or FALSE: The DEFAULT constraint can be used with NOT NULL.

True
False

💡 Hint: Consider how both rules work together.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Create a SQL statement that defines a table for employees with default values for both 'HireDate' (today's date) and 'Status' ('Active').

💡 Hint: Think about what two columns are essential for tracking employee information.

Challenge 2 Hard

Discuss the potential drawbacks of overusing DEFAULT constraints in your database design. Provide examples.

💡 Hint: Consider how system logic might change user engagement behavior.

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Reference links

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