->field("sys_member.nickname,sys_member.real_name,sys_member.uid,sys_auth_group_access.group_id,IF(coefficient is not NULL, coefficient, 100) coefficient,sys_ucenter_member.leave_time")
->field("sys_member.nickname,sys_member.real_name,sys_member.uid,sys_auth_group_access.group_id,IF(coefficient is not NULL, coefficient, 100) coefficient,sys_ucenter_member.leave_time")
->join("left join sys_auth_group auth on auth.id = sys_auth_group_access.group_id")
->join("left join sys_auth_group auth on auth.id = sys_auth_group_access.group_id")