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Mysql SQL-第二高_Mysql_Sql - Fatal编程技术网

Mysql SQL-第二高

Mysql SQL-第二高,mysql,sql,Mysql,Sql,我试图解决下面的leet代码问题 这个答案怎么了?以下答案不被接受: select t.salary as SecondHighestSalary from ( select salary from employee order by salary desc limit 1 offset 1 ) as t 这是可以接受的 select salary as SecondHighestSalary from employee a where 1 = (select

我试图解决下面的leet代码问题

这个答案怎么了?以下答案不被接受:

select t.salary as SecondHighestSalary from
(
    select salary
    from employee
    order by salary desc
    limit 1 offset 1
) as t
这是可以接受的

select salary as SecondHighestSalary
from employee a
where 1 = (select count(1) from employee b where b.salary < a.salary )
如果最低工资在表中出现两次,您的查询将不起作用

上面的查询使用了相关子查询,也就是说,对于外部表中的每一行,子查询或内部查询将执行一次


此外,这将是第n个最高工资。如果要求的是第十高的薪水,则只需将上述查询中的1替换为9。

以下两个答案均被接受

我们可以使用如下所示的子查询:

SELECT MAX(salary) AS secondhighestsalary
  FROM employee
 WHERE salary < (SELECT MAX(salary)
                 FROM employee); 
或者,您也可以使用临时表:

with temp as
(
SELECT MAX(salary) as salary FROM employee
)
select max(salary) as secondhighestsalary from employee where salary <(select salary from temp);

错误:根据薪资描述限制1,1;,从员工订单中选择不同的薪资次高薪资?两名员工可能有相同的薪水。@GordonLinoff-这是一个很好的观点。顺便说一句,这是一个相关的子查询,我忍不住觉得这让问题变得过于复杂了