Question

从DB2获取数据时遇到了问题。我想按客户汇总发票金额。在一个领域，（计算 - 我称之为InvoicedThisYear）它计算出今年开发票的数量，而在另一个领域，它计算出前一年的发票（计算，我称之为InvoicedLastYear）。然而，由于它是summariesed我已经由Cust分组，但它也想要由InvoiceYear分组的数据，所以我必须将其包括在分组中。我的问题在于我的结果我现在已经零了多年，没有数据和重复，例如：

Cust     InvoicedThisYear   InvoiceLastYear
abc          0                 100
abc          100                0

理想情况下，我希望看到

Cust   InvoicedThisYear     InvoicedLastYear
abc        100                  100

这是我的代码：

SELECT 
   Cust AS Customer,
   (CASE WHEN InvoiceYear = Year(Current Date) THEN sum(InvoiceAmt)ELSE 0 END) as InvoicedThisYear,
   (CASE WHEN InvoiceYear = year(Current Date)-1 THEN sum(InvoiceAmt)ELSE 0 END) as InvoicedLastYear
FROM 
    InvHead
GROUP BY 
   Cust, 
   InvoiceYear
HAVING
   ((CASE WHEN InvoiceYear = Year(Current Date) THEN sum(InvoiceAmt)ELSE 0 END)<>0)
   OR
   ((CASE WHEN InvoiceYear = year(Current Date)-1 THEN sum(InvoiceAmt)ELSE 0 END)<>0)
ORDER BY 
   Cust

如何获得所需的结果？如果我删除grouptimes Invoice Year

，查询将不会运行

作为大小说明，它可以在MS Access中使用而无需按发票年分组！

谢谢，

迈克尔

Answer 1

您需要将SUM()放在案例陈述周围：

SELECT 
   Cust AS Customer,
   sum(CASE WHEN InvoiceYear = Year(Current Date) THEN InvoiceAmt ELSE 0 END) as InvoicedThisYear,
   sum(CASE WHEN InvoiceYear = year(Current Date)-1 THEN InvoiceAmt ELSE 0 END) as InvoicedLastYear
FROM 
    InvHead
GROUP BY 
   Cust
ORDER BY 
   Cust

按字段删除组

1 个答案: