Flera IF-satser på MYSQL

Jag använder hellre CASE :

SELECT item_code, 
CASE category_code 
WHEN 'HERR1' THEN 1
WHEN 'COLN5' THEN 2
ELSE 'NO'
END as category_code, item_name, item_quantity 
FROM qa_items

Men IF fungerar också:IF(category_code='HERR1',1, IF(category_code='COLN5',2,'NO'))