正确格式化 sql tp 产生预期的 xml 输出

Question

感谢一位 SO 用户，我在 FOR XML 方面取得了进展，但我显然没有完全正确地使用 sql 语法。

假设我有以下 sql

DECLARE @Uname VARCHAR(15) = 'Dom',
        @Pword VARCHAR(15) = 'Monty'

SELECT 
   RTRIM(@Uname) AS '@uname',
   RTRIM( @Pword) AS '@pword',
   (SELECT COALESCE(PortOfLanding,'') AS portOfLanding 
    FROM Landings.LandingHeaders  
    WHERE Posted = 0 
    FOR XML PATH('Sale')) 
FOR XML PATH('abc')

当运行时，它产生以下内容作为输出

<abc uname="Dom" pword="Monty">&lt;Sale&gt;&lt;portOfLanding&gt;GBHTG&lt;/portOfLanding&gt;&lt;/Sale&gt;&lt;Sale&gt;&lt;portOfLanding&gt;GBHTG&lt;/portOfLanding&gt;&lt;/Sale&gt;</abc>

我真正希望的是以下内容

<abc uname="Dom" pword="Python">
    <Sale portOfLanding= "GBHTG" />
    <Sale portOfLanding= "GBHTG"/>
</abc>

事实上，我想在 SQL 中添加第三部分，这样最终可能会像这样 xml

<abc uname="Dom" pword="Python">
    <Sale portOfLanding= "GBHTG">
        <saleline detail="some value here" />
        <saleline detail="some value here" />
    <Sale/>
    <Salesnote portOfLanding= "GBHTG"/>
</abc>

有人可以指出我在原始 SQL 查询中哪里出错了吗？

谢谢

Answer 1

试试这个：

DECLARE @Uname VARCHAR(15) = 'Dom',
        @Pword VARCHAR(15) = 'Monty';

SELECT RTRIM(@Uname) AS '@uname',
       RTRIM( @Pword) AS '@pword', 
      (SELECT COALESCE(PortOfLanding,'') AS '@portOfLanding' 
       FROM Landings.LandingHeaders  
       WHERE Posted = 0 
       FOR XML PATH('Sale'), TYPE)
FOR XML PATH('abc')

您可以更深入地了解：

SELECT RTRIM(@Uname) AS '@uname',
       RTRIM( @Pword) AS '@pword', 
      (SELECT COALESCE(PortOfLanding,'') AS '@portOfLanding',
             (SELECT COALESCE(PortOfLanding,'') AS '@detail'
              FROM Landings.LandingHeaders  
              FOR XML PATH('SaleLine'), TYPE)
       FROM Landings.LandingHeaders  
       WHERE Posted = 0 
       FOR XML PATH('Sale'), TYPE)
FOR XML PATH('abc')

正确格式化 sql tp 产生预期的 xml 输出

Formatting sql correctly tp produce expected xml output

xml

sql-server

for-xml

for-xml-path