Can you group by a CASE expression?

Yes, to bucket values into custom categories before aggregating.

No, CASE is only allowed in the SELECT list.

Only if the CASE contains subqueries.

No, CASE expressions collapse the group.

medium #sql #postgresql #retail

QUESTION 01 OF 02

Grouping by Computed Expressions

Quiz for lesson: Grouping by Computed Expressions

Taken by 0 developers

Answered 0/2

Pass 70%

~3 min

00:00

Note: Sign in to save your quiz progress and results.

If you group by a computed date expression DATE_TRUNC('month', order_date), what is required in the SELECT clause?

About this Quiz

This interactive assessment is designed to test your understanding of Grouping by Computed Expressions. Whether you are a beginner looking to grasp the basics or an experienced professional aiming to refine your skills, quizzes are an excellent way to validate your knowledge and identify areas for improvement.

Instructions

Read each question carefully before answering.
Some questions may have multiple correct answers.
There is no time limit, so take your time to think.
You will receive immediate feedback after submission.

Learning Outcomes

Self-assess your current skill level.
Reinforce key concepts through active recall.
Identify knowledge gaps to focus your study.
Gain confidence in your technical expertise.
Reinforce memory and recall.