How can I select the users which are belonging to group A? - mysql

Question

How can I select the users which are belonging to group A?
My tables are below.
my user table.
ID | name |sex
1 | bob |1
2 | kayo |2
3 | ken |1
my fos_group table
ID | name
1 | student
2 | teacher
my fos_user_user_group
user_id | group_id
1 | 1
2 | 2
3 | 1
Bob and Ken are belonging to group_1(student)
Kayo is belonging to group_2(teacher)
ex) I can select 'Bob' from user table like this
$query = $em->createQuery(
"SELECT p.name,p.sex
FROM UserBundle:User p WHERE
p.id = '1' );
But I would like to select the users which belongs to student group(Bob and Ken)
How should I change the sentence in createQuery?
I just guess I need to join the tables though...
additional....
I have tried like this accroding to Fabio's answer
$query = $em->createQuery(
"SELECT p,p.id,p.username,p.userKey
FROM UserBundle:User p
INNER JOIN fos_user_user_group b
ON a.ID = b.user_id
INNER JOIN fos_group c
ON b.group_id = c.ID
WHERE c.group_id = '1'");
$this->data["teachers"] = $query->getResult();
but it says
[Semantical Error] line 0, col 94 near 'fos_user_user_group': Error: Class 'fos_user_user_group' is not defined.
I guess it means I dont have entity for 'fos_user_user_group'.
I have only entity class for Group and User,other tables were created automatically.
In meanwhile,I used like this in other place in $formmapper.
->add('teacher',
null,
array(
'query_builder' =>
function (\Doctrine\ORM\EntityRepository $rep) {
return $rep->
createQueryBuilder('s')
->join('s.groups', 'g')
->where('g.name = :group')->setParameter('group','TeacherGroup');
})
)
it works well,
how can I change this sentence for createQuery()?

Answer 1

I think you can use a INNER JOIN query
SELECT p.name,p.sex
FROM User p
INNER JOIN fos_user_user_group b
ON a.ID = b.user_id
INNER JOIN fos_group c
ON b.group_id = c.ID
WHERE c.group_id = '1'