SQL Server：操縱複雜的XML到表

Question

我有一些XML，我需要插入到兩個數據庫表。第二張表（TblSales）必須包含第一張（TblDetails.Id）的PK。

我可以使用XQuery將數據插入到這些表中，但我想不出一種將TblDetails的PK轉換爲TblSales的FK（DetailsId）的好方法？

我使用SQL Server 2005的

DECLARE @xml XML 
SET @xml = 
N'<Details> 
    <Detail> 
     <Sub>SubjectName 1</Sub> 
     <Data>DataName 1</Data> 
     <Sales> 
      <Sale> 
       <Name>Name 1</Name> 
      </Sale> 
      <Sale> 
       <Name>Name 11</Name> 
      </Sale> 
      <Sale> 
       <Name>Name 111</Name> 
      </Sale> 
     </Sales> 
    </Detail> 
    <Detail> 
     <Sub>SubjectName 2</Sub> 
     <Data>DataName 2</Data> 
     <Sales> 
      <Sale> 
       <Name>Name 2</Name> 
      </Sale> 
      <Sale> 
       <Name>Name 22</Name> 
      </Sale> 
      <Sale> 
       <Name>Name 222</Name> 
      </Sale> 
     </Sales> 
    </Detail> 
</Details>' 

-- Details 

IF object_id('TblDetails') is not null 
    drop table TblDetails 

create table TblDetails ( 
    Id int identity not null primary key, 
    Sub nvarchar(max), 
    Data nvarchar(max)) 

INSERT INTO TblDetails (
    Sub, 
    Data 
) 
SELECT 
    ParamValues.Detail.value('(Sub)[1]','NVARCHAR(MAX)') AS [Sub], 
    ParamValues.Detail.value('(Data)[1]','NVARCHAR(MAX)') AS [Data] 
FROM 
    @xml.nodes('/Details/Detail') AS ParamValues(Detail) 


-- Sales 

IF object_id('TblSales') is not null 
    drop table TblSales 

create table TblSales ( 
    Id int identity not null primary key, 
    Name nvarchar(max), 
    DetailsId int) -- FK to TblDetails.Id PK 

INSERT INTO TblSales (
    Name, 
    DetailsId 
) 
SELECT 
    ParamValues.Sale.value('(Name)[1]','NVARCHAR(MAX)') AS [Name], 
    1 --Need to get the PK of the newly added row in TblDetails 
FROM 
    @xml.nodes('/Details/Detail/Sales/Sale') AS ParamValues(Sale) 



select * from TblDetails 
select * from TblSales 

Answer 1

那麼，你可以嘗試這樣的事情：

-- first insert your rows into "TblDetails" 
INSERT INTO dbo.TblDetails(Sub, Data) 
    SELECT 
     ParamValues.Detail.value('(Sub)[1]','VARCHAR(50)') AS [Sub], 
     ParamValues.Detail.value('(Data)[1]','VARCHAR(50)') AS [Data] 
    FROM 
     @xml.nodes('/Details/Detail') AS ParamValues(Detail) 

-- now, in a second step, use a CTE (Common Table Expression) to get the 
-- inserted data and the new data for TblSales 
;WITH CTE AS 
(
    SELECT 
     ParamValues.Detail.value('(Sub)[1]','VARCHAR(50)') AS [Sub], 
     ParamValues.Detail.value('(Data)[1]','VARCHAR(50)') AS [Data], 
     XTbl.Sale.value('(Name)[1]', 'VARCHAR(50)') AS [Name] 
    FROM 
     @xml.nodes('/Details/Detail') AS ParamValues(Detail) 
    CROSS APPLY 
     ParamValues.Detail.nodes('Sales/Sale') AS XTbl(Sale) 
) 
INSERT INTO dbo.TblSales(Name, DetailsId) 
    SELECT 
     Name, 
     (SELECT TOP 1 ID -- fetch the ID from the TblDetails based on "Sub" and "Data" 
     FROM TblDetails d 
     WHERE d.Sub = CTE.Sub AND d.Data = CTE.DATA)  
    FROM CTE 

當然，這種方法只有真正起作用的，如果你的的（Sub, Data）組合在TblDetails中獨一無二。也許你需要調整這一點 - 但它應該是一個很好的startig點，我希望！