使用XML數據更新數據庫中的行

Question

這是我第一次使用XML將數據插入到表中。我將數據從前端（所有Datagridview行）保存到xml文件並將其發送到數據庫插入表SD_ShippingDetails.Below是用於讀取XML數據和保存數據的查詢。您可以從查詢中看到，我將刪除相關的ShippingID詳細信息並再次插入。（DELETE FROM SD_ShippingDetails WHERE ShippingID = @ ShippingID）。可以通過從XML中獲取數據更新SD_ShippingDetails中已有的行。如果是，請幫助我查詢。

CREATE PROCEDURE SD_Insert_ShippingDetails  
@PBMXML as varchar(Max),  
@ShippingID as INT  

AS  
BEGIn  


declare @i int  

exec sp_xml_preparedocument @i output,@PBMXML  



DELETE FROM SD_ShippingDetails WHERE ShippingID=@ShippingID  


INSERT INTO SD_ShippingDetails(ShippingID,Weight,Height,TotalBoxes,Price)  
SELECT ShippingID,Weight,Height,TotalBoxes,Price FROM OPENXML(@i,'Root/ShippingBox',2)  
WITH (  
ShippingID int,Weight varchar(20),Height varchar(20),TotalBoxes varchar(20),Price numeric(18,2))  



exec sp_xml_removedocument @i  

END 

謝謝。

Answer 1

您是SQL Server 2005上，所以你可以使用XML數據類型，而不是OPENXML所以這個答案將使用代替。對於解決方案，使用XML數據類型不是必需的。如果你願意，你可以使用openxml重寫。

您在註釋中指定SD_ShippingDetails中存在ID標識字段（我假設這是主鍵），但您也表示ShippingID和Weight的組合是唯一的。這給我們留下了一張看起來像這樣的表格結構。

create table dbo.SD_ShippingDetails 
(
    ID int identity primary key, 
    ShippingID int not null, 
    Weight varchar(20) not null, 
    Height varchar(20), 
    TotalBoxes varchar(20), 
    Price numeric(18,2), 
    unique (ShippingID, Weight) 
); 

的存儲過程首先需要更新已在SD_ShippingDetails存在的所有行之後，它需要插入缺少的行。

create procedure dbo.SD_Insert_ShippingDetails 
    @PBMXML as xml 
as 

update dbo.SD_ShippingDetails 
set Height = T.N.value('(Height/text())[1]', 'varchar(20)'), 
    TotalBoxes = T.N.value('(TotalBoxes/text())[1]', 'varchar(20)'), 
    Price = T.N.value('(Price/text())[1]', 'numeric(18,2)') 
from @PBMXML.nodes('Root/ShippingBox') as T(N) 
where ShippingID = T.N.value('(ShippingID/text())[1]', 'int') and 
     Weight = T.N.value('(Weight/text())[1]', 'varchar(20)'); 

insert into dbo.SD_ShippingDetails(ShippingID, Weight, Height, TotalBoxes, Price) 
select T.N.value('(ShippingID/text())[1]', 'int'), 
     T.N.value('(Weight/text())[1]', 'varchar(20)'), 
     T.N.value('(Height/text())[1]', 'varchar(20)'), 
     T.N.value('(TotalBoxes/text())[1]', 'varchar(20)'), 
     T.N.value('(Price/text())[1]', 'numeric(18,2)') 
from @PBMXML.nodes('Root/ShippingBox') as T(N) 
where not exists (
       select * 
       from dbo.SD_ShippingDetails 
       where ShippingID = T.N.value('(ShippingID/text())[1]', 'int') and 
         Weight = T.N.value('(Weight/text())[1]', 'varchar(20)') 
       ); 

SQL Fiddle

Answer 2

如果您有Sql Server 2005，那麼將值放在#temp或@variables表中是最好的。

隨着2008年及以後，您可以搭上MERGE功能。

http://msdn.microsoft.com/en-us/library/bb522522(v=sql.105).aspx

這裏是一個很好的鏈接，XML分解。請注意，您正在使用舊版本的OPENXML。這是一個更多的Sql Server 2000命令。檢查Plamen的博客下面的2005年和以上的語法。

http://pratchev.blogspot.com/2007/06/shredding-xml-in-sql-server-2005.html

Answer 3

我會填充XML到一個變量表，然後使用Update聲明和Insert有Not Exists。

如果你有SQL 2008，你可以取代你的刪除和插入這個語句...

MERGE SD_ShippingDetails AS Target 
USING (SELECT ShippingID, 
       Weight, 
       Height, 
       TotalBoxes, 
       Price 
     FROM OPENXML(@i,'Root/ShippingBox',2)  
       WITH (ShippingID int, 
         Weight varchar(20), 
         Height varchar(20), 
         TotalBoxes varchar(20), 
         Price numeric(18,2))) AS source (ShippingID,Weight,Height,TotalBoxes,Price) 
     ON (target.ShippingID = source.ShippingID) 
WHEN MATCHED THEN 
     UPDATE SET Weight = source.Weight, 
        Height = source.Height, 
        TotalBoxes = source.TotalBoxes, 
        Price = source.Price 
WHEN NOT MATCHED THEN  
     INSERT (ShippingID,Weight,Height,TotalBoxes,Price) 
     VALUES (source.ShippingID,source.Weight,source.Height,source.TotalBoxes,source.Price);