Question

我正在搜索发票的发票明细表，其数量为＆gt; 0且<0。发票分项表包含发票中所有项目的详细信息。如何编写一个查询，该查询提供所有具有项目数量＆gt; 0和＆lt; 0的发票。

Answer 1

这样的事情怎么样？这使用两个查询。第一个查找所有负数量的发票。然后它应用第二个查询，从发票列表中仅查找那些也具有正数量的发票。

SELECT DISTINCT
  PosNegInvoices.InvoiceID 
FROM ItemizedInvoice AS NegInvoices
CROSS APPLY
(
  SELECT
    InvoiceID
  FROM ItemizedInvoice 
  WHERE InvoiceID = NegInvoices.InvoiceID
  AND Quantity > 0
) AS PosNegInvoices
WHERE NegInvoices.Quantity < 0

这是另一个使用CTE的版本：

WITH NegInvoices AS
(
  SELECT
    InvoiceID
  FROM ItemizedInvoice
  WHERE Quantity < 0
),
PosInvoices AS 
(
  SELECT
    InvoiceID
  FROM ItemizedInvoice
  WHERE Quantity > 0
)
SELECT DISTINCT
  PosInvoices.InvoiceID
FROM NegInvoices 
JOIN PosInvoices
ON NegInvoices.InvoiceID = PosInvoices.InvoiceID

搜索发票标签以查找数量＆gt; 0和＆lt; 0的发票

1 个答案: