我使用FOR XML子句从SQL获得以下输出：
<q17:DestinationSection xmlns:q17="http://ITrack.Transmission/2011/02/25/Objects">
<q17:DestinationCode>1</q17:DestinationCode>
<q17:DestinationName>Strada Rampei 9, Iasi</q17:DestinationName>
<q17:DestinationAddress1>Strada Rampei 9, Iasi</q17:DestinationAddress1>
<q17:DestinationAddress2>
xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
</q17:DestinationAddress2>
</q17:DestinationSection>
DestinationSection是此数据块的主根。有没有可能做一些解决方法，并在<q17:DestinationAddress2></q17:DestinationAddress2>标签中有类似下面的内容？
<q17:DestinationAddress2 xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"</q17:DestinationAddress2>
我尝试了一些东西，但是我收到一条错误消息，说我需要声明命名空间但我真的不知道在哪里＆＃34;介绍＆＃34;那个定义。
我的SQL语句
DECLARE @XMLFINAL VARCHAR(MAX)
SET @XMLFINAL=''
DECLARE @XMLFINAL2 VARCHAR(MAX)
SET @XMLFINAL2=''
DECLARE @NUMBER NVARCHAR(100)
DECLARE @NUMBER2 NVARCHAR(100)
DECLARE @XML VARCHAR(MAX)
DECLARE @XML2 VARCHAR(MAX)
DECLARE Rec CURSOR FAST_FORWARD FOR
SELECT GID FROM PurchaseDocumentsHeader
OPEN Rec
FETCH NEXT FROM Rec INTO @NUMBER2
WHILE @@FETCH_STATUS = 0
BEGIN
SET @XML2=''
;WITH XMLNAMESPACES ('http://ITrack.Transmission/2011/02/25/Objects' as q17)
SELECT @XML2= (
SELECT
DestCode AS 'q17:DestinationCode', DestDescr 'q17:DestinationName', DestAddr AS 'q17:DestinationAddress1', DestAddr2 AS 'q17:DestinationAddress2',
DestZIP AS 'q17:DestinationZIP'
FROM PurchaseDocumentsHeader WHERE GID=@NUMBER2
FOR XML RAW('q17:DestinationSection'),ELEMENTS
)
FETCH NEXT FROM Rec INTO @NUMBER2
SET @XMLFINAL2=@XMLFINAL2+@XML2
END
CLOSE Rec DEALLOCATE Rec
修改
请在下面找到我的DDL。它是用于从官方表格中提取数据的视图。
CREATE VIEW [dbo].[PurchaseDocumentsHeader]
AS
SELECT esd.GID, esd.ADRegistrationDate, esgo.Code AS DestCode, esgo.Description AS DestDescr, esgo.Address1 AS DestAddr, esgo.fCityCode AS DestCity,
esgp.TaxRegistrationNumber AS DestZIP, 'xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"' AS DestAddr2, esgo.Description AS DestRomanized,
esgo.Address1 AS DestAddress1Romanized,
'xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"' AS DestAddress2Romanized, esgp.TaxRegistrationNumber AS DestZIPRom,
esgo.fCityCode AS DestCityRomanized, esgo.fCountryCode AS DestCountry, cast('DestinationGLN xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>' AS XML) AS DestGLN,
'xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"' AS DestCoord
FROM ESFIDocumentTrade esd
LEFT JOIN ESGOSites esgo on esd.fDeliverySiteGID=esgo.GID
LEFT JOIN ESFITradeAccount esc on esd.fTradeAccountGID=esc.GID
LEFT JOIN ESGOPerson esgp on esc.fPersonCodeGID=esgo.GID
LEFT JOIN ESFIDocumentType est on esd.fADDocumentTypeGID=est.GID
WHERE esd.fTransitionStepCode='APPROVED' AND est.Code='CVR'
AND YEAR(esd.ADRegistrationDate)=YEAR(GETDATE())
AND MONTH(esd.ADRegistrationDate)=MONTH(GETDATE())
AND DAY(esd.ADRegistrationDate)=DAY(GETDATE())
GO
稍后修改
CREATE TABLE DocPurcharseHeader
(
ADRegistrationDate date,
Code NVARCHAR(4000),
Description NVARCHAR(4000),
Address1 NVARCHAR (4000),
Address2 NVARCHAR (4000),
City NVARCHAR (4000),
ZIPCode NVARCHAR(4000)
)
INSERT INTO DocPurcharseHeader (ADRegistrationDate, Code, Description, Address1, Address2, City, ZIPCode)
VALUES('2017-10-16', '01', 'MyPOS', 'MyPOSAddress1', 'MyPOSAddress2', 'BUCHAREST', '123456')
第二次编辑
;WITH XMLNAMESPACES ('http://ITrack.Transmission/2011/02/25/Objects' as q17)
SELECT @XMLSalesOrders=(
SELECT DestCode AS [q17:DestinationCode]
,DestDescr AS [q17:DestinationName]
,DestAddr AS [q17:DestinationAddress1]
,DestAddr2 AS [q17:DestinationAddress2]
FROM PurchaseDocumentsHeader
FOR XML PATH('q17:DestinationSection'),ELEMENTS XSINIL,ROOT('q17:DestinationSections'))
上面的代码生成以下输出，没有XSINL指令：
<q17:DestinationSections xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:q17="http://ITrack.Transmission/2011/02/25/Objects">
<q17:DestinationSection>
<q17:DestinationCode>1</q17:DestinationCode>
<q17:DestinationName>Strada Rampei 9, Iasi</q17:DestinationName>
<q17:DestinationAddress1>Strada Rampei 9, Iasi</q17:DestinationAddress1>
<q17:DestinationAddress2/>
</q17:DestinationSection>
<q17:DestinationSection>
答案 0 :(得分：1)
你正试图超越强大的XML引擎。
如您的其他问题所述：
永远不要在CURSOR中做到这一点！他们是坏的和邪恶的，直接来自程序性思维的地狱，是由意大利面条代码的魔鬼发明的......
试试这样：
我使用你的表DDL插入一些数据。第二行在地址2中将有NULL。通常，XML将简单地省略NULL值。不存在的节点将被读取为NULL值。但您可以NULL强制xsi.nil="true"作为ELEMENTS XSINIL加入{<1}}：
CREATE TABLE DocPurcharseHeader
(
ADRegistrationDate date,
Code NVARCHAR(4000),
Description NVARCHAR(4000),
Address1 NVARCHAR (4000),
Address2 NVARCHAR (4000),
City NVARCHAR (4000),
ZIPCode NVARCHAR(4000)
);
INSERT INTO DocPurcharseHeader (ADRegistrationDate, Code, Description, Address1, Address2, City, ZIPCode)
VALUES('2017-10-16', '01', 'MyPOS', 'MyPOSAddress1', 'MyPOSAddress2', 'BUCHAREST', '123456')
,('2017-10-16', '01', 'MyPOS', 'MyPOSAddress1', NULL, 'BUCHAREST', '123456');
WITH XMLNAMESPACES('http://ITrack.Transmission/2011/02/25/Objects' AS q17)
SELECT Code AS [q17:DestinationCode]
,Description AS [q17:DestinationName]
,Address1 AS [q17:DestinationAddress1]
,Address2 AS [q17:DestinationAddress2]
FROM DocPurcharseHeader
FOR XML PATH('q17:DestinationSection'),ELEMENTS XSINIL,ROOT('q17:DestinationSections');
结果
<q17:DestinationSections xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:q17="http://ITrack.Transmission/2011/02/25/Objects">
<q17:DestinationSection>
<q17:DestinationCode>01</q17:DestinationCode>
<q17:DestinationName>MyPOS</q17:DestinationName>
<q17:DestinationAddress1>MyPOSAddress1</q17:DestinationAddress1>
<q17:DestinationAddress2>MyPOSAddress2</q17:DestinationAddress2>
</q17:DestinationSection>
<q17:DestinationSection>
<q17:DestinationCode>01</q17:DestinationCode>
<q17:DestinationName>MyPOS</q17:DestinationName>
<q17:DestinationAddress1>MyPOSAddress1</q17:DestinationAddress1>
<q17:DestinationAddress2 xsi:nil="true" />
</q17:DestinationSection>
</q17:DestinationSections>
NULL值：试试这个
DECLARE @DummyTable TABLE(SomeDescription VARCHAR(500), SomeValue VARCHAR(100));
INSERT INTO @DummyTable VALUES('A real NULL value',NULL)
,('An empty string','')
,('A blank string',' ')
,('Some Text','blah blah');
WITH XMLNAMESPACES('SomeURL' AS q17)
SELECT SomeDescription AS [q17:Description]
,SomeValue AS [q17:Value]
FROM @DummyTable
FOR XML PATH('q17:row'),ELEMENTS XSINIL,ROOT('root');
要得到这个
<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:q17="SomeURL">
<q17:row>
<q17:Description>A real NULL value</q17:Description>
<q17:Value xsi:nil="true" />
</q17:row>
<q17:row>
<q17:Description>An empty string</q17:Description>
<q17:Value></q17:Value>
</q17:row>
<q17:row>
<q17:Description>A blank string</q17:Description>
<q17:Value> </q17:Value>
</q17:row>
<q17:row>
<q17:Description>Some Text</q17:Description>
<q17:Value>blah blah</q17:Value>
</q17:row>
</root>
您可以看到， real NULL 编码为xsi:nil="true"，而空字符串显示为<q17:Value></q17:Value>（与{{1}完全相同}）。
查看this answer，了解有关<q17:Value />和NULL的一些示例。查看this answer以了解有关empty