需要在 Impala 中创建一个视图，其中 Un-Pivots、Pivots 和 Union 都是它

Question

我第一次尝试在 SQL 中做一些适当的事情，只是在复制一些我已经可以通过 Alteryx 轻松完成的事情时遇到了麻烦。

本质上，需要一些基本的数据整理来创建我已经在 Impala/Hive 中创建的 Table 的摘要。基本的 table 需要分解成更小的 table（未旋转和旋转），然后将它们联合在一起以创建聚合的 table.

Table如下：

Run_Code | ID | ColB | ColC | ColD | ColE | ColF | ColG | TaxExpense | RetainedExpense | IncomeExpense | Year
-----------------------------------------------------------------------------------------------------------------
run1     | 21 | 1234 | 1234 | 1234 | 1234 | 1234 | 1234 | 1234.56789 | 1234.56789      |  1234.56789   | Year1 
run1     | 22 | 1234 | 1234 | 1234 | 1234 | 1234 | 1234 | 1234.56789 | 1234.56789      |  1234.56789   | Year2
run1     | 23 | 1234 | 1234 | 1234 | 1234 | 1234 | 1234 | 1234.56789 | 1234.56789      |  1234.56789   | Year3
run1     | 24 | 1234 | 1234 | 1234 | 1234 | 1234 | 1234 | 1234.56789 | 1234.56789      |  1234.56789   | Year4

目前以下是在Alteryx中完成的；其中只有 TaxExpense 被选中，然后为 Year 取消透视，然后作为列透视回。

Run_Code | ID | ColB | ColC | ColD |     Name    | Year1 | Year2 | Year3 | Year4
-----------------------------------------------------------------------------------------------------------------
run1     | 21 | 1234 | 1234 | 1234 | Tax Expense | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | Tax Expense | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | Tax Expense | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | Tax Expense | (sum) | (sum) | (sum) | (sum)

保留费用和收入支出也是如此。

Run_Code | ID | ColB | ColC | ColD |      Name      | Year1 | Year2 | Year3 | Year4
-----------------------------------------------------------------------------------------------------------------
run1     | 21 | 1234 | 1234 | 1234 | RetainedExpense | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | RetainedExpense | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | RetainedExpense | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | RetainedExpense | (sum) | (sum) | (sum) | (sum)

最终结果如下，所需结果如下：

Run_Code | ID | ColB | ColC | ColD |      Name       | Year1 | Year2 | Year3 | Year4
-----------------------------------------------------------------------------------------------------------------
run1     | 21 | 1234 | 1234 | 1234 | TaxExpense      | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | TaxExpense      | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | TaxExpense      | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | TaxExpense      | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | RetainedExpense | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | RetainedExpense | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | RetainedExpense | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | RetainedExpense | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | IncomeExpense   | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | IncomeExpense   | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | IncomeExpense   | (sum) | (sum) | (sum) | (sum)
run1     | 21 | 1234 | 1234 | 1234 | IncomeExpense   | (sum) | (sum) | (sum) | (sum)

感谢任何帮助创建解决上述问题的 SQL。

Answer 1

嗯。 . .如果我理解正确，你可以取消透视并重新聚合：

select Run_Code, ID, ColB, ColC, ColD,
       sum(case when year = 'year1' then expense end) as year_1,
       sum(case when year = 'year2' then expense end) as year_2,
       sum(case when year = 'year3' then expense end) as year_3,
       sum(case when year = 'year4' then expense end) as year_4
from ((select Run_Code, ID, ColB, ColC, ColD, 'TaxExpense' as name, TaxExpense as expense, year
       from t
      ) union all
      (select Run_Code, ID, ColB, ColC, ColD, 'RetainedExpense' as name, RetainedExpense, year
       from t
      ) union all
      (select Run_Code, ID, ColB, ColC, ColD, 'IncomeExpense' as name, IncomeExpense, year
       from t
      )
     ) t
group by Run_Code, ID, ColB, ColC, ColD, name

需要在 Impala 中创建一个视图，其中 Un-Pivots、Pivots 和 Union 都是它

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需要在 Impala 中创建一个视图，其中 Un-Pivots、Pivo​​ts 和 Union 都是它

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需要在 Impala 中创建一个视图，其中 Un-Pivots、Pivots 和 Union 都是它