MySQL Join with multiple conditions

Question

I have a problem with an sql query, actually a simple query but I can\'t figure up what am I missing, so I came to ask your help... So, what i have to do

I have two

Answer 1

You can group conditions with parentheses. When you are checking if a field is equal to another, you want to use OR. For example WHERE a='1' AND (b='123' OR b='234').

SELECT u.*
FROM rooms AS u
JOIN facilities_r AS fu
ON fu.id_uc = u.id_uc AND (fu.id_fu='4' OR fu.id_fu='3')
WHERE vizibility='1'
GROUP BY id_uc
ORDER BY u_premium desc, id_uc desc