mysql選擇用戶信息和組類別

Question

我試圖做一個mysql搜索，它返回用戶信息與分組類別（group_id's）。我只需要一些幫助讓我的查詢正確：

SELECT a.*, a.name AS editor, a.name AS created_by, b.*, c.* FROM `cm0x8_users` AS a LEFT JOIN cm0x8_users_xref AS b ON b.userid = a.id LEFT JOIN cm0x8_user_usergroup_map AS c ON c.user_id = a.id WHERE (a.block IN (0, 1)) AND c.group_id NOT IN(6,7,8) ORDER BY a.name asc 

返回同一用戶3次（他們在3個不同的組）。

例子：

id   name   group_id 
1   Fred   1 
1   Fred   2 
1   Fred   3 
2   John   1 
3   Jane   1 
3   Jane   3 

但我後：

id   name   group_id 
1   Fred   1, 2, 3 
2   John   1 
3   Jane   1, 3 

（或類似）

任何幫助將是巨大的！

Answer 1

這似乎是給了我預期的結果..

SELECT a.*,a.name AS editor,a.name AS created_by,b.*,group_concat(c.group_id) as gid,c.* FROM `#__users` AS a LEFT JOIN #__users_xref AS b ON b.userid = a.id LEFT JOIN #__user_usergroup_map AS c ON c.user_id = a.id WHERE (a.block IN (0, 1)) AND c.group_id NOT IN(6,7,8) GROUP BY a.id ORDER BY a.name asc