如何将TSQL查询的xml输出转换为varchar输出
我正试图产生如何将TSQL查询的xml输出转换为varchar输出,sql,xml,database,tsql,sql-server-2008,Sql,Xml,Database,Tsql,Sql Server 2008,我正试图产生 SELECT DISTINCT P.DOMAIN_ID, P.SOURCE_SYSTEM_ID FROM EDW.dbo.DOMAIN_VALUE AS P WHERE P.ID = 4 AND CURRENT_FLAG = 'Y' EXCEPT ( SELECT F.DOMAIN_ID, F.SOURCE_SYSTEM_ID FROM EDW.dbo.DOMAIN AS F
SELECT DISTINCT
P.DOMAIN_ID,
P.SOURCE_SYSTEM_ID
FROM EDW.dbo.DOMAIN_VALUE AS P
WHERE P.ID = 4
AND CURRENT_FLAG = 'Y'
EXCEPT
( SELECT F.DOMAIN_ID,
F.SOURCE_SYSTEM_ID
FROM EDW.dbo.DOMAIN AS F
WHERE F.ID = 4
AND F.CURRENT_FLAG = 'Y'
)
FOR XML PATH('DOMAIN'),
ROOT('DOMAIN_VALUE')
结果选项卡中XML格式的输出值为
<REFERENCE_DOMAIN_VALUE>
<REFERENCE_DOMAIN>
<REFERENCE_DOMAIN_ID>10799</REFERENCE_DOMAIN_ID>
<REFERENCE_SOURCE_SYSTEM_ID>7452-001</REFERENCE_SOURCE_SYSTEM_ID>
</REFERENCE_DOMAIN>
</REFERENCE_DOMAIN_VALUE>
10799
7452-001
现在我需要将这个XML转换为varchar(max),但结果必须相同。只需将其子查询为标量值并将其转换。这里的诀窍是,对于子查询中的XML
,
和顶部的Exception,不要混合使用,所以首先子查询Exception部分
SELECT CONVERT(varchar(max), (
SELECT * FROM (
SELECT DISTINCT P.DOMAIN_ID, P.SOURCE_SYSTEM_ID
FROM EDW.dbo.DOMAIN_VALUE AS P
WHERE P.ID = 4 AND CURRENT_FLAG = 'Y'
EXCEPT (
SELECT F.DOMAIN_ID, F.SOURCE_SYSTEM_ID
FROM EDW.dbo.DOMAIN AS F
WHERE F.ID = 4 AND F.CURRENT_FLAG = 'Y' )
) I
FOR XML PATH('DOMAIN'), ROOT('DOMAIN_VALUE')
))
这个问题已经解决了,感谢你们在逻辑上解释了这个把戏。