ELSE belongs here way more than 3 WHEN clauses,

[MikeFilimonov]

https://github.com/mobinni/Complete-SQL-Database-Bootcamp-Zero-to-Mastery/blob/master/SQL%20Deep%20Dive/Conditional%20Statements/answers.sql

SELECT prod_id, title, price,
CASE
WHEN price > 20 THEN 'expensive'
WHEN price <= 10 THEN 'cheap'
WHEN price BETWEEN 10 and 20 THEN 'average'
END AS "price class"
FROM products

ELSE belongs here way more than 3 WHEN clauses, e.g:

SELECT prod_id, title, price,
CASE
WHEN price > 20 THEN 'expensive'
WHEN price <= 10 THEN 'cheap'
ELSE price BETWEEN 10 and 20 THEN 'average'
END AS "price class"
FROM products