select role_id from sys_role where role_key = #{roleKey} and del_flag = '0' limit 1 select count(1) from sys_user_role where user_id = #{userId} and role_id = #{roleId} insert into sys_user_role(user_id, role_id) values (#{userId}, #{roleId}) delete from sys_user_role where user_id = #{userId} and role_id = #{roleId} select count(1) from sys_user where user_id = #{userId} and del_flag = '0' select user_id from sys_user where user_name = #{userName} and del_flag = '0' limit 1 select user_name as username, nick_name as nickname from sys_user where user_id = #{userId} and del_flag = '0' limit 1 select u.user_id as userId, u.user_name as userName, u.nick_name as nickName, ( select group_concat(distinct ml2.major_id order by ml2.major_id separator ',') from tb_major_lead ml2 where ml2.user_id = u.user_id ) as majorIds, ( select group_concat(distinct m2.major_name order by m2.major_name separator ',') from tb_major_lead ml3 left join tb_major m2 on m2.id = ml3.major_id where ml3.user_id = u.user_id ) as majorNames from sys_user u inner join sys_user_role ur on u.user_id = ur.user_id inner join sys_role r on r.role_id = ur.role_id and r.role_key = #{roleKey} u.del_flag = '0' and exists (select 1 from tb_major_lead m3 where m3.user_id = u.user_id and m3.major_id = #{majorId}) order by u.user_id desc