SQL查询组的结果

Question

Im quite new for all the hibernate and SQL scopes, so forgive me for the silly question.

I want to make a sql query using hibernate which will group all the results by the groupUserName.

I have the following tables in my DB:

ms_GroupUser:

+-------------+---------------+----------+---------+
| groupUserId | groupUserName | password | groupId |
+-------------+---------------+----------+---------+
|           1 | Alice         | 123456   |       1 |                
|           2 | BOB           | 654321   |       1 |
|           3 | BOB           | 654321   |       2 |
|           4 | Charlie       | 654321   |       1 |
+-------------+---------------+----------+---------+

ms_Group:

+---------+-----------+--------+----------------+------------+
| groupId | groupName | system | systemHostName | systemPort |
+---------+-----------+--------+----------------+------------+
|       1 | TEST      | FOO    | 1.1.1.1        |       8080 |
|       2 | TEST2     | FOO    | 1.1.1.1        |       8080 |
+---------+-----------+--------+----------------+------------+

My Query is:

SELECT groupt.groupname, 
       usert.groupusername 
FROM   ms_group AS groupt, 
       ms_groupuser AS usert 
WHERE  groupt.groupid = usert.groupid 
       AND usert.password = '654321' 
GROUP  BY usert.groupusername 

I expect it will bring me back as a result this bag:

BOB -> TEST, TEST2.

Charlie -> TEST.

What it is actually bring back is:

BOB -> TEST.

Charlie -> TEST.

Where is TEST2?

Can you please help me? am I miss understood something?

Thank you very much!

Answer 1

SELECT groupUserName,groupName 
FROM ms_GroupUser u, ms_group g
WHERE g.groupId=u.groupId
AND u.password=654321 

Output

| GROUPUSERNAME | GROUPNAME |
|---------------|-----------|
|           BOB |      TEST |
|           BOB |     TEST2 |
|       Charlie |      TEST |

Fiddle

Edit

Based upon your question in comments

SELECT groupUserName,GROUP_CONCAT(groupName)
FROM ms_GroupUser u, ms_group g
WHERE g.groupId=u.groupId AND u.password=654321 
GROUP BY groupUserName

Output

| GROUPUSERNAME | GROUP_CONCAT(GROUPNAME) |
|---------------|-------------------------|
|           BOB |              TEST,TEST2 |
|       Charlie |                    TEST |

Fiddle

Answer 2

Just simply add "groupt.groupName" in the group by. So the code will become like this

SELECT groupt.groupName,
       usert.groupUserName
FROM   Group1 AS groupt,
       GroupUser AS usert
WHERE  groupt.groupId = usert.groupId
AND    usert.password = '654321'
GROUP  BY groupt.groupName,
       usert.groupUserName; 

Answer 3

SELECT A.groupUserName,B.groupName
FROM ms_GroupUser A LEFT JOIN ms_Group B
ON A.groupID=B.groupID