ORACLE中如何获取第10高的成本？

Question

我有一个 table 产品，我有 standard_cost 列，我想获得位于第 10 位的产品的标准成本。到目前为止我试过

SELECT t1.* 
FROM (SELECT  STANDARD_COST 
      FROM OT.PRODUCTS 
      ORDER BY STANDARD_COST DESC) t1  
WHERE ROWNUM=1 
ORDER BY t1.STANDARD_COST ASC;

但是当我首先对内部查询进行降序排序然后在 ORACLE 中进行升序排序时，它给了我相同的值。我的查询有什么问题？

Answer 1

有任何方法可以找到第 n 个最高成本。

SELECT T1.STANDARD_COST
FROM (
    SELECT STANDARD_COST, DENSE_RANK() OVER (ORDER BY STANDARD_COST DESC) nth_highest_cost 
    FROM PRODUCTS
) T1
WHERE nth_highest_cost = 10;

您可以参考以下方法寻找其他方法：

Different ways to nth Highest in Oracle

Answer 2

可以使用nth_value解析函数。

Select * from
(select t.*, DISTINCT NTH_VALUE(t.standard_cost,10)
       OVER (ORDER BY t.standard_cost desc
       RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING)
       AS TENTH_HIGHEST
FROM PRODUCTS t)
Where standard_cost = tenth_highest;

干杯！！

ORACLE中如何获取第10高的成本？

How to get the 10th highest cost in ORACLE?

sql

oracle

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