How to Write a Case Statement in SQL Server in SQL Server
Case statements are useful when you're reaching for an if statement in your selectclause.
select
id,
name,
category,
price,
case
when category = 5 then 'Premium'
when category = 4 then 'Gold'
when category = 3 then 'Standard'
when category <= 2 then 'Basic'
else 'unknown'
end as quality_level
from products;