delete from sys_user_attention where user_id = #{userId} and to_user_id = #{toUserId} select id,user_id,to_user_id from sys_user_attention where user_id = #{userId} and to_user_id = #{toUserId} SELECT count(id)bean FROM sys_user_attention where to_user_id = #{userId} ORDER BY(to_user_id); SELECT count(id)attention FROM sys_user_attention where user_id = #{userId} ORDER BY(user_id);