下面这个SQL语句该怎么改呀

select * from exam_result where math > 80 or select * from exam_result order by chinese desc limit 3;这个该怎么改呢

select * from exam_result where math > 80
union all
select * from exam_result order by chinese desc limit 3;

问题需要描述清楚吧，你的语句目的是什么？ 两个select语句为什么要用or连接，为什么不直接写两个查询语句？

select * from exam_result where math > 80 or id in (select id from exam_result order by chinese desc limit 3)