SQL 语句中
asc是指定列按升序排列(即:从小到大排序) —降序排列
desc则是指定列按降序排列(即:从大到小排序) —升序排列
排序子句语法:order by 列名 asc/desc
select * from video_order where user_id = #{user_id} order by create_time desc