Question

我有一个名为“付款”的表格，其中包含以下数据

+---------------------------------------+
|   status    |  currency   |  amount   |  
+---------------------------------------+
| ------------------------------------- |
| paid        |  USD        |  10       |  
| pending     |  USD        |  20       | 
| processing  |  GBP        |  30       | 
| paid        |  GBP        |  40       | 
| paid        |  EUR        |  50       | 
| pending     |  USD        |  60       | 
| processing  |  EUR        |  70       | 
+----------------------------------------+

我需要编写一个查询，该查询将为我提供以下格式的结果

Paid : 3 
Processing: 2
Pending: 2

我可以使用以下查询做到这一点

select status, count(status)
from payments
group by status;

现在，我还需要知道这些高级组中每个按货币分组的金额总和。例如，

对于具有3条记录的“已付款”状态，我还需要

USD: 10
GBP: 40
EUR: 50

我该怎么做？

Answer 1

select status, currency, sum(amount)
from payments
group by status, currency;

Answer 2

我想你想要

select status, currency, count(*), sum(amount)
from payments
group by grouping sets ( (status, currency), (status) )

Answer 3

第一个查询应类似于：

SELECT INITCAP(STATUS) || ' : ' || COUNT(*) AS OUTPUT_TEXT
  FROM PAYMENTS
  GROUP BY STATUS
  ORDER BY CASE STATUS
             WHEN 'paid' THEN 1
             WHEN 'processing' THEN 2
             WHEN 'pending' THEN 3
             ELSE 4
           END

第二个查询应该是

SELECT CURRENCY || ': ' || SUM(CURRENCY) AS OUTPUT_TEXT
  FROM PAYMENTS
  GROUP BY CURRENCY
  ORDER BY CASE CURRENCY
             WHEN 'USD' THEN 1
             WHEN 'GBP' THEN 2
             WHEN 'EUR' THEN 3
             ELSE 4
           END

好运。

一组结果中的sql分组

3 个答案: