这是我的第一个问题,很抱歉违反了任何潜规则。我目前正在尝试使用 InventoryItem
表中的主键从 InventoryCategory
表中检索类别。
由于一个项目可以有一个或多个类别,InventoryCategory
表包含 ItemCode
、CategoryCode
和 IsPrimary
(定义哪个类别是primary category,是TRUE/FALSE类型)
我确实需要对只有一个类别的所有项目使用主要类别,对具有两个类别的项目使用非主要类别。我正在尝试使用 CASE 语句将正确的值输出为命名的 ParentCategory
字段,但遇到了困难。
目前,我只有 WHERE IC.IsPrimary = 1
,因为我还不知道如何查询 ItemCode
以返回 # of CategoryCodes
并根据它选择非主要类别。我尝试执行 COUNT,但它总是返回 1 并继续删除。
代码:
SELECT
BillToCode, POSWorkstationID,
InvoiceDate, ItemName,
CategoryCode,
SUM(QtySales) QtySales,
SUM(Sales) Sales,
SUM(QtyReturns) QtyReturns,
SUM([Returns]) [Returns],
WarehouseCode
FROM
(SELECT
CI.BillToCode, CI.WarehouseCode,
CI.POSWorkstationID, CI.InvoiceDate,
IC.CategoryCode, ii.ItemName,
CASE
WHEN CI.Type IN ('Invoice', 'Opening Invoice')
THEN CID.QuantityShipped
ELSE 0
END AS QtySales,
CASE
WHEN CI.Type IN ('Invoice', 'Opening Invoice')
THEN CID.ExtPriceRate
ELSE 0
END AS Sales,
CASE
WHEN CI.Type IN ('Credit Memo', 'Opening Credit', 'Gift Card', 'Gift Certificate')
THEN CID.QuantityShipped
ELSE 0
END AS QtyReturns,
CASE
WHEN CI.Type IN ('Credit Memo', 'Opening Credit', 'Gift Card', 'Gift Certificate')
THEN CID.ExtPriceRate
ELSE 0
END AS [Returns]
FROM
CustomerInvoice CI
INNER JOIN
Customer C ON CI.BillToCode = C.CustomerCode
INNER JOIN
CustomerInvoiceDetail CID ON CI.InvoiceCode = CID.InvoiceCode
INNER JOIN
InventoryItem ii ON CID.ItemCode = ii.ItemCode
INNER JOIN
InventoryCategory IC ON CID.ItemCode = IC.ItemCode
WHERE
(CI.IsBatch = 0 OR CI.IsBatch IS NULL)
AND CI.IsPosted = 1
AND CI.[Type] = 'Invoice'
AND CI.IsVoided = 0
AND IC.IsPrimary = 1) Items
GROUP BY
POSWorkstationID, BillToCode, ItemName, InvoiceDate, CategoryCode, WarehouseCode
最佳答案
如果非主行的 IsPrimary 字段为 0,您可以执行 SELECT MIN
语句。见下文:
SELECT BillToCode
, POSWorkstationID
, InvoiceDate
, ItemName
, CategoryCode
, SUM(QtySales) QtySales
, SUM(Sales) Sales
, SUM(QtyReturns) QtyReturns
, SUM([Returns]) [Returns]
, WarehouseCode
FROM (
SELECT CI.BillToCode
, CI.WarehouseCode
, CI.POSWorkstationID
, CI.InvoiceDate
, IC.CategoryCode
, ii.ItemName
, CASE WHEN CI.Type IN ('Invoice', 'Opening Invoice') THEN CID.QuantityShipped ELSE 0 END AS QtySales
, CASE WHEN CI.Type IN ('Invoice', 'Opening Invoice') THEN CID.ExtPriceRate ELSE 0 END AS Sales
, CASE WHEN CI.Type IN ('Credit Memo', 'Opening Credit', 'Gift Card', 'Gift Certificate') THEN CID.QuantityShipped ELSE 0 END AS QtyReturns
, CASE WHEN CI.Type IN ('Credit Memo', 'Opening Credit', 'Gift Card', 'Gift Certificate') THEN CID.ExtPriceRate ELSE 0 END AS [Returns]
FROM CustomerInvoice CI
INNER JOIN Customer C ON CI.BillToCode = C.CustomerCode
INNER JOIN CustomerInvoiceDetail CID ON CI.InvoiceCode = CID.InvoiceCode
INNER JOIN InventoryItem ii ON CID.ItemCode = ii.ItemCode
INNER JOIN InventoryCategory IC ON CID.ItemCode = IC.ItemCode
WHERE (CI.IsBatch = 0 OR CI.IsBatch IS NULL)
AND CI.IsPosted = 1
AND CI.[Type] = 'Invoice' AND CI.IsVoided = 0
AND IC.IsPrimary = (SELECT MIN(IsPrimary) FROM InventoryCategory ICi WHERE ICi.ItemCode = IC.ItemCode)
) Items
GROUP BY POSWorkstationID, BillToCode, ItemName, InvoiceDate, CategoryCode, WarehouseCode
关于SQL SELECT 语句 - 根据第二个表中的匹配数选择记录,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34801048/