如何按优先级在属性中按顺序进行排序

Question

example i have a list of users

id           name         role

1            join         member
2            cathy        sale
3            mark         admin
4            orthor       member
5            Sy           admin

i want to order by role asc with priority when role= 'member'

result:

 id           name         role

1            join         member
4            orthor       member
3            mark         admin
5            Sy           admin
2            cathy        sale

how to order by this in rails??

Answer 1

从表顺序中选择*，方式是（如果role ='member'，则为0，否则1结束）

Answer 2

SELECT id,name,role
FROM (
    SELECT *, (Case when role='member' THEN 0 ELSE 1 END) as order_role
    FROM your_table
)
ORDER BY order_role,role ASC