Question

我有以下代码从链接服务器获取数据，但如果有跳过Next，我如何检查sqlserver表中是否有重复记录，否则从select中插入。我想使用以下文件进行比较 [CUSTOMER],[SO DATE],[SO NUMBER],[itemid],[PROMISED DATE],[PO #]

insert db1.dbo.WORKORDERS 
   ([WORK ORDER #],[QUANTITY],[CUSTOMER],[SO DATE],[SO NUMBER],[ROUTING],[itemid],[CUSTOMER PN],[SHIP VIA],[PROMISED DATE],[COMMENTS],[PO #],[WO Notes])
select 
  convert(varchar(10), next value for dbo.WorkOrderSequence ),
x.Quantity,--
  x.Customer_Bill_Name,
  x.TransactionDate,
  x.Reference,
  X.Category,
  x.ItemID,
  x.PartNumber,
  x.WhichShipVia,
  x.ShipByDate,
  x.Comment2,
  x.CustomerInvoiceNo,
  x.SalesDescription
from
  openquery
  ([DB29],
    'select              
        Customers.Customer_Bill_Name,
        JrnlHdr.TransactionDate,
       Cast(JrnlRow.Quantity as Decimal(38,0)) as Quantity,
        JrnlHdr.Reference, 
        LineItem.Category,
       LineItem.ItemID ,
        LineItem.PartNumber, 
        Customers.WhichShipVia, 
        JrnlHdr.ShipByDate, 
        JrnlHdr.Comment2,
        JrnlHdr.CustomerInvoiceNo, 
        LineItem.SalesDescription    
FROM   Customers
    INNER JOIN JrnlHdr
ON Customers.CustomerRecordNumber = JrnlHdr.CustVendId
    LEFT OUTER JOIN Address
ON Customers.CustomerRecordNumber = Address.CustomerRecordNumber
    INNER JOIN JrnlRow
ON JrnlHdr.PostOrder = JrnlRow.PostOrder
    INNER JOIN LineItem 
ON JrnlRow.ItemRecordNumber = LineItem.ItemRecordNumber
WHERE  JrnlHdr.JrnlKey_Journal = 11 AND JrnlHdr.TransactionDate = CURDATE()
AND JrnlHdr.PostOrder = JrnlRow.PostOrder  
AND JrnlHdr.CustVendId = Customers.CustomerRecordNumber 
AND JrnlRow.ItemRecordNumber = LineItem.ItemRecordNumber 
AND JrnlHdr.POSOisClosed = 0

)  as x

Answer 1

使用带有exists的相关子查询来消除已存在的行：

select ... from ... where not exists ( select 42 from db1.dbo.WorkOrders where ... )

Answer 2

您可能会发现MERGE语句可用于此目的。它允许您指定目标表，源查询，连接条件以及要匹配或不匹配的操作。

Answer 3

您可以使用EXCEPT：

这将为您提供链接服务器上不存在的记录：

SELECT [CUSTOMER],[SO DATE],[SO NUMBER],[itemid],[PROMISED DATE],[PO #]
FROM current_database
EXCEPT
SELECT [CUSTOMER],[SO DATE],[SO NUMBER],[itemid],[PROMISED DATE],[PO #]
FROM linked_server_current_database

这将为您提供当前服务器上不存在的记录：

SELECT [CUSTOMER],[SO DATE],[SO NUMBER],[itemid],[PROMISED DATE],[PO #]
FROM  linked_server_current_database
EXCEPT
SELECT [CUSTOMER],[SO DATE],[SO NUMBER],[itemid],[PROMISED DATE],[PO #]
FROM current_database

Answer 4

由于您只使用插入，因此不存在是理想的选择，并且不需要进行太多更改。

尝试修复自己的错误，

insert db1.dbo.WORKORDERS 
   ([WORK ORDER #],[QUANTITY],[CUSTOMER],[SO DATE],[SO NUMBER],[ROUTING],[itemid],[CUSTOMER PN],[SHIP VIA],[PROMISED DATE],[COMMENTS],[PO #],[WO Notes])
Select 
  convert(varchar(10), next value for dbo.WorkOrderSequence ),
  Quantity,
  Customer_Bill_Name,
  TransactionDate,
  Reference,
  Category,
  ItemID,
  PartNumber,
  WhichShipVia,
  ShipByDate,
  Comment2,
  CustomerInvoiceNo,
  SalesDescription 
FROM
(
select 
x.Quantity,--
  x.Customer_Bill_Name,
  x.TransactionDate,
  x.Reference,
  X.Category,
  x.ItemID,
  x.PartNumber,
  x.WhichShipVia,
  x.ShipByDate,
  x.Comment2,
  x.CustomerInvoiceNo,
  x.SalesDescription
from
  openquery
  ([DB29],
    'select              
        Customers.Customer_Bill_Name,
        JrnlHdr.TransactionDate,
       Cast(JrnlRow.Quantity as Decimal(38,0)) as Quantity,
        JrnlHdr.Reference, 
        LineItem.Category,
       LineItem.ItemID ,
        LineItem.PartNumber, 
        Customers.WhichShipVia, 
        JrnlHdr.ShipByDate, 
        JrnlHdr.Comment2,
        JrnlHdr.CustomerInvoiceNo, 
        LineItem.SalesDescription    
FROM   Customers
    INNER JOIN JrnlHdr
ON Customers.CustomerRecordNumber = JrnlHdr.CustVendId
    LEFT OUTER JOIN Address
ON Customers.CustomerRecordNumber = Address.CustomerRecordNumber
    INNER JOIN JrnlRow
ON JrnlHdr.PostOrder = JrnlRow.PostOrder
    INNER JOIN LineItem 
ON JrnlRow.ItemRecordNumber = LineItem.ItemRecordNumber
WHERE  JrnlHdr.JrnlKey_Journal = 11 AND JrnlHdr.TransactionDate = CURDATE()
AND JrnlHdr.PostOrder = JrnlRow.PostOrder  
AND JrnlHdr.CustVendId = Customers.CustomerRecordNumber 
AND JrnlRow.ItemRecordNumber = LineItem.ItemRecordNumber 
AND JrnlHdr.POSOisClosed = 0

)  as x'
)t4
where not exists(
select 1 from db1.dbo.WORKORDERS WO where wo.[CUSTOMER]=t4.Customer_Bill_Name
and [SO DATE]=t4.TransactionDate AND[SO NUMBER]=t4.Reference 
AND[itemid]=t4.ItemID and [PROMISED DATE]=t4.ShipByDate and [PO #]=t4.[PO #]
)

如何在使用insert from select之前检查重复项

4 个答案: