FAQ: Conditional Aggregates - CASE WHEN


This community-built FAQ covers the “CASE WHEN” exercise from the lesson “Conditional Aggregates”.

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This exercise can be found in the following Codecademy content:

SQL: Table Transformation

FAQs on the exercise CASE WHEN

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Hi everyone!! Can anyone explain how “GROUP BY” statements work? I’ve seen a few explanations but none of them seem consistent with the way we have used them in the course, or at least i’m not catching on. Any help is appreciated! thanks


GROUP BY let’s us specify which columns from the table to use and their order from left to right.


Notice that column 1 is elevation_tier?


I see! and ORDER BY does the order from top to bottom?

thank you!


Correct; ORDER BY is a sort order clause, hence the parameters, ASC and DESC.