1- 求排名前6-10 的员工
方法一：
select employee, salary
from (
select employee, salary, row_number() over (order by salary desc) r
from salary_table
)
where r between 6 and 10;
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方法二：
select employee, salary
from (
select employee, salary, rank() over (order by salary desc) r
from salary_table
)
where r between 6 and 10;