SQL 中的多个 XML 标记答案

【问题标题】：Multiple XML tags in SQLSQL 中的多个 XML 标记
【发布时间】：2018-06-07 23:36:31
【问题描述】：

我有以下数据用于 select * from _temp :-

我想在下面生成 xml :-

<xml>
  <StoryData>
    <UserStoryId>141204</UserStoryId>
    <Description>Customer can see the applicable discount on the quote and change in premium.</Description>
    <Summary>Customer can see the applicable discount on the quote and change in premium.</Summary>
    <UserStoryID>141204</UserStoryID>
    <VagueWord>and</VagueWord>
    <VagueWord>applicable</VagueWord>
  </StoryData>

  <StoryData>
    <UserStoryId>141205</UserStoryId>
    <Description>Customer can see the applicable discount on the quote and change in premium.</Description>
    <Summary>Customer can see the applicable discount on the quote and change in premium.</Summary>
    <UserStoryID>141205</UserStoryID>
    <VagueWord>and</VagueWord>
    <VagueWord>applicable</VagueWord>
  </StoryData>  
</xml>

我尝试了以下查询：-

select distinct t1.UserStoryId,t1.Description,t1.Summary,t1.UserStoryID,t2.VagueWord
from _temp t1 left join
(
 select UserStoryId,VagueWord from _temp
) t2
on t1.UserStoryId=t2.UserStoryId
where t1.UserStoryId in (141204,141205)

FOR XML PATH('StoryData')

,ROOT('xml'),type

正在生成：-

<xml>
  <StoryData>
    <UserStoryId>141204</UserStoryId>
    <Description>Customer can see the applicable discount on the quote and change in premium.</Description>
    <Summary>Customer can see the applicable discount on the quote and change in premium.</Summary>
    <UserStoryID>141204</UserStoryID>
    <VagueWord>and</VagueWord>
  </StoryData>
  <StoryData>
    <UserStoryId>141204</UserStoryId>
    <Description>Customer can see the applicable discount on the quote and change in premium.</Description>
    <Summary>Customer can see the applicable discount on the quote and change in premium.</Summary>
    <UserStoryID>141204</UserStoryID>
    <VagueWord>applicable</VagueWord>
  </StoryData>
  <StoryData>
    <UserStoryId>141205</UserStoryId>
    <Description>Customer can see the applicable discount on the quote and change in premium.</Description>
    <Summary>Customer can see the applicable discount on the quote and change in premium.</Summary>
    <UserStoryID>141205</UserStoryID>
    <VagueWord>and</VagueWord>
  </StoryData>
  <StoryData>
    <UserStoryId>141205</UserStoryId>
    <Description>Customer can see the applicable discount on the quote and change in premium.</Description>
    <Summary>Customer can see the applicable discount on the quote and change in premium.</Summary>
    <UserStoryID>141205</UserStoryID>
    <VagueWord>applicable</VagueWord>
  </StoryData>
</xml>

正如我们所见，VagueWord 是多个，StoryData 标记会针对特定的 UserStoryID 重复。

我希望不同的 UserStoryID 和 Vagueword 标记的不同标记在内部重复，如上所示。

我怎样才能做到这一点？

【问题讨论】：

以下链接docs.microsoft.com/en-us/sql/relational-databases/xml/… 包含的示例也显示了与您的要求类似的案例

标签： sql sql-server xml sql-server-2008

【解决方案1】：

您可以使用子查询：

;WITH cte AS (
SELECT *
FROM (VALUES
(141204,'Customer can see the applicable discount on the quote and change in premium.','Customer can see the applicable discount on the quote and change in premium.','and'),
(141204,'Customer can see the applicable discount on the quote and change in premium.','Customer can see the applicable discount on the quote and change in premium.','applicable'),
(141205,'Customer can see the applicable discount on the quote and change in premium.','Customer can see the applicable discount on the quote and change in premium.','and'),
(141205,'Customer can see the applicable discount on the quote and change in premium.','Customer can see the applicable discount on the quote and change in premium.','applicable')
) as t(UserStoryId, [Description], Summary, VagueWord)
)

SELECT  UserStoryId, 
        [Description], 
        Summary, 
        (SELECT VagueWord
        FROM cte
        WHERE UserStoryId = c.UserStoryId
        FOR XML PATH(''),TYPE)
FROM cte c
GROUP BY  UserStoryId, 
        [Description], 
        Summary
FOR XML PATH('StoryData'),ROOT('xml'),TYPE

输出：

<xml>
  <StoryData>
    <UserStoryId>141204</UserStoryId>
    <Description>Customer can see the applicable discount on the quote and change in premium.</Description>
    <Summary>Customer can see the applicable discount on the quote and change in premium.</Summary>
    <VagueWord>and</VagueWord>
    <VagueWord>applicable</VagueWord>
  </StoryData>
  <StoryData>
    <UserStoryId>141205</UserStoryId>
    <Description>Customer can see the applicable discount on the quote and change in premium.</Description>
    <Summary>Customer can see the applicable discount on the quote and change in premium.</Summary>
    <VagueWord>and</VagueWord>
    <VagueWord>applicable</VagueWord>
  </StoryData>
</xml>

【讨论】：

如果我想添加另一个多条目标签作为 VagueWord 怎么办？
同理。或者您可以使用 EXPLICIT 模式。