比较每位客户的销售额与去年的销售额

Question

我有2个查询，使用UNION比较了2年中每个客户的销售额。下面返回两列，一列用于组织，一列用于销售价值/客户。但是2年拆分无效。似乎将所有值都拉到一个列中，而不是将2018年的列和2019年的列都拉。也许我应该使用联接或子查询？

返回结果看起来像：

Organization    Last Year      Previous year
CUS                 12000        160000
etc

SELECT Top 25
    FORMAT(SUM(dbo.ARInvoices.arpFullInvoiceSubtotalBase), 'C2') AS "previousyear ", dbo.Organizations.cmoOrganizationID AS "Organization"
FROM (dbo.ARInvoices
LEFT OUTER JOIN dbo.Organizations ON dbo.ARInvoices.arpCustomerOrganizationID = dbo.Organizations.cmoOrganizationID)  
WHERE  YEAR(arpInvoiceDate) = year(DATEADD(year, -2, getdate()))AND arpInvoiceType = 1
GROUP BY dbo.Organizations.cmoOrganizationID

UNION

SELECT Top 25
    FORMAT(SUM(dbo.ARInvoices.arpFullInvoiceSubtotalBase), 'C2') AS "Lastyear", dbo.Organizations.cmoOrganizationID AS "Organization"
FROM (dbo.ARInvoices
LEFT OUTER JOIN dbo.Organizations ON dbo.ARInvoices.arpCustomerOrganizationID = dbo.Organizations.cmoOrganizationID)   
WHERE  YEAR(arpInvoiceDate) = year(DATEADD(year, -1, getdate()))AND arpInvoiceType = 1
GROUP BY dbo.Organizations.cmoOrganizationID'

Answer 1

您可以进行条件聚合

select
    sum(case 
        when arpInvoiceDate >= datefromparts(year(getdate()) - 2, 1, 1) 
             and arpInvoiceDate < datefromparts(year(getdate()) - 1, 1, 1) 
        then i.arpFullInvoiceSubtotalBase
    end) as previousYear,
    sum(case 
        when arpInvoiceDate >= datefromparts(year(getdate()) - 1, 1, 1)
        then i.arpFullInvoiceSubtotalBase
    end) as lastYear
from dbo.ARInvoices i 
inner join dbo.Organizations o ON i.arpCustomerOrganizationID = o.cmoOrganizationID
where arpInvoiceType = 1 and arpInvoiceDate >= datefromparts(year(getdate()) - 2, 1, 1)
group by o.cmoOrganizationID

注意：

• 我使用了INNER JOIN而不是LEFT JOIN，因为在GROUP BY子句中使用了左表的一列

• 表别名确实使查询更短，更易于阅读

• 我更改了日期过滤的实现，因此在表列上不使用日期功能（这使查询更有效）