【MySQL】MySQL的group_concat使用例子

select t.name, group_concat(distinct t.role order by t.sort asc separator ‘;‘) from 
(
select ‘Nick‘ as name, ‘coder‘ as role, 1 as sort
union all
select ‘Nick‘ as name, ‘admin‘ as role, 3 as sort
union all
select ‘Nick‘ as name, ‘admin‘ as role, 2 as sort
union all
select ‘Viki‘ as name, ‘coder‘ as role, 1 as sort
union all
select ‘Viki‘ as name, ‘admin‘ as role, 2 as sort
union all
select ‘Viki‘ as name, ‘player‘ as role, 3 as sort
union all
select ‘Darren‘ as name, ‘admin‘ as role, 2 as sort
union all
select ‘Darren‘ as name, ‘player‘ as role, 1 as sort
) t 
group by t.name;