Alias not working in query

Question

I need to display the name of the user and their department who has raised the maximum number of queries. I wrote the following query by joining 5 tables; user, query, profile, degree, and department.

The problem is in the result the alias is not being used for the column names. For both the columns it appears as just name

select user.name 'USER_NAME',department.name 'DEPT_NAME'
from user
inner join query on (query.user_id=user.id)
inner join profile on (user.profile_id=profile.id)
inner join degree on (profile.degree_id=degree.id)
inner join department on (degree.department_id=department.id)
group by user.name
order by count(query.id) desc
limit  1

Answer 1

Use 'as' keyword in order to use alias name in mysql and also remove single quotes.

select user.name as USER_NAME from user;

Answer 2

The following syntax work perfectly for me :

select U.name AS "USER_NAME", D.name AS "DEPT_NAME"
from user U
inner join query Q on (Q.user_id=U.id)
inner join profile P on (U.profile_id=P.id)
inner join degree C on (P.degree_id=C.id)
inner join department D on (C.department_id=D.id)
group by U.name
order by count(Q.id) desc
limit  1;

Sometimes, Mysql prefer you pout an alias on your column when you use some JOIN.