具有枢轴功能的命名约定

【问题标题】：Naming conventions with pivot function具有枢轴功能的命名约定
【发布时间】：2015-01-22 23:07:51
【问题描述】：

我正在使用的代码如下。问题是我正在旋转的项目在命名约定中排在最后。即null_pdiv_spend、null_pdiv_visits。我希望命名约定为spend_null_pdiv 以与我的其他表格一致。请指教。

pivot(
    count(x) as visits,
    sum(y) as spend,
    sum(c) as items,
    sum(b) as mkdn

    for pdiv_cd in (
    '@@@' as null_pdiv,
    '010' as hbags_acc,
    '011' as fine_jewelry,
    '070' as pdiv_70
    )
)

【问题讨论】：

标签： oracle oracle11g pivot

【解决方案1】：

您可以添加另一个级别的子查询，并使用别名重命名列：

select null_pdiv_spend as spend_null_pdiv,
  null_pdiv_visits as visits_null_pdiv,
  ...
from (
  select *
  from (
    ...
  )
  pivot(count(x) as visits, sum(y) as spend, sum(c) as items, sum(b) as mkdn
    for (pdiv_cd) in (
      '@@@' as null_pdiv,
      '010' as hbags_acc,
      '011' as fine_jewelry,
      '070' as pdiv_70
    )
  )
)

如果这对您很重要，您也可以修改结果集中列的顺序。

【讨论】：