如何使用merge语句在不更改项顺序的情况下插入批量数据

merge

问题是,当我按此顺序插入itemid 1024100010121025时,SQL Server会自动更改itemid 1000101210241025的顺序。

我想插入我实际传递的数据。

下面是示例代码。这将把XML字符串解析为表对象:

DECLARE @tblPurchase TABLE
            (
              Purchase_Detail_ID INT ,
              Purchase_ID INT ,
              Head_ID INT ,
              Item_ID INT 
            );


INSERT INTO @tblPurchase (Purchase_Detail_ID, Purchase_ID, Head_ID, Item_ID)
    SELECT  
        Tbl.Col.value('Purchase_Detail_ID[1]', 'INT') AS Purchase_Detail_ID,
        Tbl.Col.value('Purchase_ID[1]', 'INT') AS Purchase_ID,
        Tbl.Col.value('Head_ID[1]', 'INT') AS Head_ID,
        Tbl.Col.value('Item_ID[1]', 'INT') AS Item_ID 
    FROM    
        @PurchaseDetailsXML.nodes('/documentelement/TRN_Purchase_Details') Tbl(Col) 

TRN_Purchase_Details 表:

MERGE TRN_Purchase_Details MTD
USING (SELECT    
           Purchase_Detail_ID,
           Id AS Purchase_ID,
           Head_ID, Item_ID 
       FROM      
           @tblPurchase
       LEFT JOIN 
           @ChangeResult ON 1 = 1) AS TMTD ON MTD.Purchase_Detail_ID = TMTD.Purchase_Detail_ID
                                           AND MTD.Purchase_ID = TMTD.Purchase_ID

WHEN MATCHED THEN
    UPDATE SET MTD.Head_ID = TMTD.Head_ID,
               MTD.Item_ID = TMTD.Item_ID 

WHEN NOT MATCHED BY TARGET THEN
    INSERT (Purchase_ID, Head_ID, Item_ID)
    VALUES (Purchase_ID, Head_ID, Item_ID)

WHEN NOT MATCHED BY SOURCE AND       
     MTD.Purchase_ID = (SELECT TOP 1 Id
                        FROM @ChangeResult
                        WHERE Id > 0) THEN
    DELETE;