Sql server 使用XML字符串更新表中的数据
我有一个包含如下列的表Sql server 使用XML字符串更新表中的数据,sql-server,xml,sql-server-2008,Sql Server,Xml,Sql Server 2008,我有一个包含如下列的表 SiteID(identity\u Col) SiteName POrderID 位置 地址 集群 VenderName 我想使用xml字符串插入/更新/删除此表中的数据。除此列之外,XML字符串还包含一个列viz。行信息。此列将具有“未更改”、“更新”、“新建”、“删除”等值。应根据该值插入、更新和删除表中的行 我的XML字符串如下所示: <NewDataSet> <DataTable> <SiteID>2</
SiteID(identity\u Col)
SiteName
POrderID
位置
地址
集群
VenderName
<NewDataSet>
<DataTable>
<SiteID>2</SiteID>
<SiteName>NIZAMPURA</SiteName>
<POrderID>7</POrderID>
<Location>NIZAMPURA</Location>
<SiteAddress>Vadodara</SiteAddress>
<Cluster>002</Cluster>
<SubVendorName>Test Vender-1</SubVendorName>
<RowInfo>UNCHANGED</RowInfo>
</DataTable>
<DataTable>
<SiteID>16</SiteID>
<SiteName>Site-1</SiteName>
<POrderID>7</POrderID>
<Location>Alkapuri</Location>
<SiteAddress>test</SiteAddress>
<Cluster>Test Cluster</Cluster>
<SubVendorName>Test Vender12</SubVendorName>
<RowInfo>UNCHANGED</RowInfo>
</DataTable>
<DataTable>
<SiteID>17</SiteID>
<SiteName>Site-3</SiteName>
<POrderID>7</POrderID>
<Location>Alkapuri123</Location>
<SiteAddress>test123</SiteAddress>
<Cluster>Test Cluster123</Cluster>
<SubVendorName>Test Vender123</SubVendorName>
<RowInfo>DELETE</RowInfo>
</DataTable>
</NewDataSet>'
但我不知道如何使用XML更新/删除表中的记录。请引导
我是XML的新手,所以不知道。如果我做了一些幼稚的事情,请原谅。我强烈建议不要再使用旧的、遗留的
OPENXML
东西了-有了SQL Server中的XML支持,使用内置的XPath/XQuery方法就容易多了
在您的例子中,我将使用CTE(公共表表达式)将XML分解为一个由行和列组成的“内联”表:
DECLARE @input XML = '<NewDataSet>
<DataTable>
<SiteID>2</SiteID>
<SiteName>NIZAMPURA</SiteName>
<POrderID>7</POrderID>
<Location>NIZAMPURA</Location>
<SiteAddress>Vadodara</SiteAddress>
<Cluster>002</Cluster>
<SubVendorName>Vender-1</SubVendorName>
<RowInfo>UPDATE</RowInfo>
</DataTable>
<DataTable>
<SiteName>Site-1</SiteName>
<POrderID>7</POrderID>
<Location>Alkapuri</Location>
<SiteAddress>test</SiteAddress>
<Cluster>Cluster-1</Cluster>
<SubVendorName>Test Vender</SubVendorName>
<RowInfo>NEW</RowInfo>
</DataTable>
</NewDataSet>'
;WITH XMLData AS
(
SELECT
NDS.DT.value('(SiteID)[1]', 'int') AS 'SiteID',
NDS.DT.value('(SiteName)[1]', 'varchar(50)') AS 'SiteName',
NDS.DT.value('(POrderID)[1]', 'int') AS 'POrderID',
NDS.DT.value('(Location)[1]', 'varchar(100)') AS 'Location',
NDS.DT.value('(SiteAddress)[1]', 'varchar(100)') AS 'SiteAddress',
NDS.DT.value('(Cluster)[1]', 'varchar(100)') AS 'Cluster',
NDS.DT.value('(SubVendorName)[1]', 'varchar(100)') AS 'SubVendorName',
NDS.DT.value('(RowInfo)[1]', 'varchar(20)') AS 'RowInfo'
FROM
@input.nodes('/NewDataSet/DataTable') AS NDS(DT)
)
SELECT *
FROM XMLDATA
现在,若您使用的是SQL Server2008或更高版本,则基本上可以将其和在一条语句中执行INSERT/UPDATE
相结合
如果您使用的是2005,则需要将此信息存储到存储过程中的临时表/表变量中,或者需要多次执行select;CTE只允许一个命令跟随它
更新:使用此CTE,您可以将其与合并
:
;WITH XmlData AS
(
SELECT
NDS.DT.value('(SiteID)[1]', 'int') AS 'SiteID',
NDS.DT.value('(SiteName)[1]', 'varchar(50)') AS 'SiteName',
NDS.DT.value('(POrderID)[1]', 'int') AS 'POrderID',
NDS.DT.value('(Location)[1]', 'varchar(100)') AS 'Location',
NDS.DT.value('(SiteAddress)[1]', 'varchar(100)') AS 'SiteAddress',
NDS.DT.value('(Cluster)[1]', 'varchar(100)') AS 'Cluster',
NDS.DT.value('(SubVendorName)[1]', 'varchar(100)') AS 'SubVendorName',
NDS.DT.value('(RowInfo)[1]', 'varchar(20)') AS 'RowInfo'
FROM
@input.nodes('/NewDataSet/DataTable') AS NDS(DT)
)
MERGE INTO dbo.SiteTRS t
USING XmlData x ON t.SiteID = x.SiteID
WHEN MATCHED AND x.RowInfo = 'UPDATE'
THEN
UPDATE SET
t.SiteName = x.SiteName,
t.POrderID = x.POrderID,
t.Location = x.Location,
t.SiteAddress = x.SiteAddress,
t.Cluster = x.Cluster,
t.SubVendorName = x.SubVendorName
WHEN MATCHED AND x.RowInfo = 'DELETE'
THEN DELETE
WHEN NOT MATCHED AND x.RowInfo = 'NEW'
THEN
INSERT(SiteID, SiteName, POrderID, Location, SiteAddress, Cluster, SubVendorName)
VALUES(x.SiteID, x.SiteName, x.POrderID, x.Location, x.SiteAddress, x.Cluster, x.SubVendorName)
;
请参阅更多参考资料:
SiteID
是唯一标识每一行的唯一ID(主键)。由于它对源表中的每一行(您的CTE基于XML)执行此操作,因此它知道该命令正在执行的行(以及SiteID
),这就是为什么您可以只编写。。。然后删除
如果某个条件匹配-SQL Server将知道从源表中删除哪一行
SiteID SiteName POrderID Location SiteAddress Cluster SubVendorName RowInfo
2 NIZAMPURA 7 NIZAMPURA Vadodara 002 Vender-1 UPDATE
NULL Site-1 7 Alkapuri test Cluster-1 Test Vender NEW
;WITH XmlData AS
(
SELECT
NDS.DT.value('(SiteID)[1]', 'int') AS 'SiteID',
NDS.DT.value('(SiteName)[1]', 'varchar(50)') AS 'SiteName',
NDS.DT.value('(POrderID)[1]', 'int') AS 'POrderID',
NDS.DT.value('(Location)[1]', 'varchar(100)') AS 'Location',
NDS.DT.value('(SiteAddress)[1]', 'varchar(100)') AS 'SiteAddress',
NDS.DT.value('(Cluster)[1]', 'varchar(100)') AS 'Cluster',
NDS.DT.value('(SubVendorName)[1]', 'varchar(100)') AS 'SubVendorName',
NDS.DT.value('(RowInfo)[1]', 'varchar(20)') AS 'RowInfo'
FROM
@input.nodes('/NewDataSet/DataTable') AS NDS(DT)
)
MERGE INTO dbo.SiteTRS t
USING XmlData x ON t.SiteID = x.SiteID
WHEN MATCHED AND x.RowInfo = 'UPDATE'
THEN
UPDATE SET
t.SiteName = x.SiteName,
t.POrderID = x.POrderID,
t.Location = x.Location,
t.SiteAddress = x.SiteAddress,
t.Cluster = x.Cluster,
t.SubVendorName = x.SubVendorName
WHEN MATCHED AND x.RowInfo = 'DELETE'
THEN DELETE
WHEN NOT MATCHED AND x.RowInfo = 'NEW'
THEN
INSERT(SiteID, SiteName, POrderID, Location, SiteAddress, Cluster, SubVendorName)
VALUES(x.SiteID, x.SiteName, x.POrderID, x.Location, x.SiteAddress, x.Cluster, x.SubVendorName)
;