使用主查询的 WITH 子句 IN where STATEMENT 的结果

Question

我在 SQL 相对较新，所以如果这很明显，我深表歉意，但我不知道如何在我的主查询的 where 语句中使用 WITH 子句查询的结果。我的 with 查询提取每个客户的第一条记录并给出该记录的销售日期：

WITH summary AS(
SELECT ed2.customer,ed2.saledate,
ROW_NUMBER()OVER(PARTITION BY ed2.customer
ORDER BY ed2.saledate)AS rk
FROM Filteredxportdocument ed2)
SELECT s.*
FROM summary s
WHERE s.rk=1

我需要使用上述查询中的日期作为起点，并提取每个客户前 12 个月的所有记录，即销售日期介于 ed2.saledate 和 ed2.saledate+ 之间12个月。我的主要查询是：

SELECT  ed.totalamountincvat, ed.saledate, ed.name AS SaleRef, 
ed.customer, ed.customername, comp.numberofemployees, 
comp.companyuid
FROM exportdocument AS ed INNER JOIN
FilteredAccount AS comp ON ed.customer = comp.accountid
WHERE (ed.statecode = 0)  AND
ed.saledate BETWEEN ed2.saledate AND DATEADD(M,12,ed2.saledate)

我确定我需要将主查询添加到 WITH 子句中，但我不知道在哪里。有没有人能帮忙

Answer 1

summary 你将只能使用一次。替代解决方案是将摘要存储到 temp table 中，并根据需要多次使用它。类似于： Select * 从 Summary s 进入 #temp where s.rk=1

Answer 2

这有帮助吗？

;WITH summary AS(
SELECT ed2.customer,ed2.saledate,
ROW_NUMBER()OVER(PARTITION BY ed2.customer
ORDER BY ed2.saledate)AS rk
FROM Filteredxportdocument ed2)

SELECT  ed.totalamountincvat, ed.saledate, ed.name AS SaleRef, 
ed.customer, ed.customername, comp.numberofemployees, 
comp.companyuid
FROM exportdocument AS ed INNER JOIN
FilteredAccount AS comp ON ed.customer = comp.accountid
OUTER APPLY (SELECT s.* FROM summary s WHERE s.rk=1) ed2
WHERE ed.statecode = 0  AND
ed.saledate BETWEEN ed2.saledate AND DATEADD(M,12,ed2.saledate)
and ed.Customer = ed2.Customer

CTE 的结果未缓存或存储，因此您无法重复使用它。

编辑：

根据您要求 CTE 的所有记录都应在最终结果中，这是一个新查询：

;WITH summary AS(
SELECT ed2.customer,ed2.saledate,
ROW_NUMBER()OVER(PARTITION BY ed2.customer
ORDER BY ed2.saledate)AS rk
FROM Filteredxportdocument ed2)

SELECT  
    ed.totalamountincvat, 
    ed.saledate, 
    ed.name AS SaleRef, 
    ed.customer, 
    ed.customername, 
    comp.numberofemployees, 
    comp.companyuid
FROM 
summary ed2 
left join exportdocument ed 
    on ed.Customer = ed2.Customer
    and ed.statecode = 0  
    AND ed.saledate BETWEEN ed2.saledate AND DATEADD(M,12,ed2.saledate)
INNER JOIN FilteredAccount comp 
    ON ed.customer = comp.accountid
WHERE 
     s.rk=1

使用主查询的 WITH 子句 IN where STATEMENT 的结果

Using the results of WITH clause IN where STATEMENT of main query

sql-server

sql-server-2008

with-clause