我正在尝试生成
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”选项卡中的XML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>
现在我需要将此XML转换为varchar(max),但结果必须相同。
答案 0 :(得分:6)
将其子查询为标量值并将其转换。这里的诀窍是FOR XML in a subquery
和顶部的EXCEPT不混合,所以首先查询EXCEPT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')
))