Sql 如何把线路接到哥伦布？SExt查询

这里我写的查询非常简单

 SELECT        GeneralLedger, YEAR(ReportingDate) AS jaar, MONTH(ReportingDate) AS periode, SUM(AmountDCDebit - AmountDCCredit) AS Saldo
FROM            dbo.GeneralLedgerBalances
GROUP BY GeneralLedger, YEAR(ReportingDate), MONTH(ReportingDate)
HAVING        (YEAR(ReportingDate) = 2020)

我得到的结果是

我多么希望得到这个结果：

---

我想获取列中的句点如何更改查询？

您可以使用条件聚合：

SELECT
    GeneralLedger, 
    YEAR(ReportingDate) AS jaar, 
    SUM(IIF(MONTH(ReportingDate) =  1, AmountDCDebit - AmountDCCredit, 0)) AS Saldo01,
    SUM(IIF(MONTH(ReportingDate) =  2, AmountDCDebit - AmountDCCredit, 0)) AS Saldo02,
    ...
    SUM(IIF(MONTH(ReportingDate) = 12, AmountDCDebit - AmountDCCredit, 0)) AS Saldo12
FROM dbo.GeneralLedgerBalances
WHERE (YEAR(ReportingDate) = 2020)
GROUP BY GeneralLedger, YEAR(ReportingDate)

---

您好，如果我尝试此操作，我会收到以下错误：函数参数列表中出现错误：“SUM”无法识别。无法分析查询文本。@Barendrecht。你做错了什么

SUM（）

是一个非常常见的SQL函数。@Barendrecht:

SUM（）

表达式之间缺少逗号。。。