我们可以使用 Oracle 中 PIVOT 语句的输出创建表吗？

Question

我有一个表，并在其上使用 PIVOT 语句返回我正在寻找的输出，现在我需要将其存储到表中以供进一步计算。

当我做这样的事情时：

    create table new_table as 
(
select * from mytable
unpivot(period for months in 
(
"October 2019",
"November 2019",
"December 2019",
"January 2020",
"February 2020",
"March 2020" ))
pivot(
avg(period) 
for PROD_SKU in ('ABC123','DEF456')
)
order by 1);

它抛出“ORA-00907：缺少右括号”错误。

我的数据透视查询工作正常！

Answer 1

是的，AS 之后和; 之前不需要括号。

如果你有样本数据：

CREATE TABLE mytable (
  PROD_SKU,
  "October 2019",
  "November 2019",
  "December 2019",
  "January 2020",
  "February 2020",
  "March 2020"
) AS
SELECT 'ABC123', 10, 11, 12, 13, 14, 15 FROM DUAL UNION ALL
SELECT 'DEF456', 20, 21, 22, 23, 24, 25 FROM DUAL;

然后：

create table new_table as 
select *
from   mytable
unpivot
(
  period
  for months in (
    "October 2019",
    "November 2019",
    "December 2019",
    "January 2020",
    "February 2020",
    "March 2020"
  )
)
pivot
(
  avg(period) 
  for PROD_SKU in ('ABC123','DEF456')
)
order by 1;

那么new_table 包含：

SELECT * FROM new_table;

MONTHS	'ABC123'	'DEF456'
December 2019	12	22
February 2020	14	24
January 2020	13	23
March 2020	15	25
November 2019	11	21
October 2019	10	20

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