Union tables instead of intersect - mysql

Question

I have the follow structure
user
id | name
----------
1 | Foo
2 | Bar
profile
id | name | user_id
--------------------------
1 | Profile 1 | 1
2 | Profile 2 | 2
profile_access
id | user_id | profile_id
--------------------------
1 | 2 | 1
Expect the follow result from a query
id | name | user_id
-----------------------------------
1 | Profile 1 | 1
2 | Profile 2 | 2
1 | Profile 1 | 2
But I do't know how to "merge" these tables. I tried:
SELECT profile.*
FROM profile profile
LEFT JOIN profile_access AS profile_access
ON (
profile_access.profile_id = profile.id
)
Which returns
id | name | user_id
-----------------------------------
1 | Profile 1 | 1
2 | Profile 2 | 2
And
SELECT profile.*
FROM profile profile
RIGHT JOIN profile_access AS profile_access
ON (
profile_access.profile_id = profile.id
)
Which results
id | name | user_id
-----------------------------------
2 | Profile 1 | 2
What is the correct way to do this query? Am I using joins wrong or expecting a impossible result with these tables?
EDIT:
Expected result should be:
id | name | user_id
-----------------------------------
1 | Profile 1 | 1
2 | Profile 2 | 2
1 | Profile 1 | 2

Answer 1

It is unclear what the exact logic you want is, but the following returns the results in the question:
select p.id, p.name, p.user_id
from profile p
union all
select p.id, p.name, pa.user_id
from profile p join
profile_access pa
on pa.profile_id = p.id;
EDIT:
This returns:
id | name | user_id
-----------------------------------
1 | Profile 1 | 1
2 | Profile 2 | 2
1 | Profile 1 | 2
Note that the last row has a 1 for the id instead of a 2 (as in the original expected answer). This is sensible to me, because id = 1 is only tied to profile name = 'Profile 1' in the table. But, to get the actual output:
select p.id, p.name, p.user_id
from profile p
union all
select pa.profile_id, p.name, pa.user_id
from profile p join
profile_access pa
on pa.user_id = p.user_id;
The reason I went with the first solution is because the sample queries all join profile and profile_access on the profile_id field and not on the user_id field.