Xml 存储过程返回外部选择的次数与内部选择的次数相同

运行存储过程以返回数据库中的所有记录（本例中为手机）及其颜色选项

问题是，当一部手机有4种颜色时，它也会返回ModelGroup 4次

我知道这可能是显而易见的，或者我需要先把它们放在桌子上吗

存储过程：

SELECT 

PB.ModelGroup as '@group',

    (SELECT

        PB1.UID as '@pid',
        PB1.Brand as '@brand',
        PB1.Title as '@title',
        PB1.Friendly_URL_Name as '@url',
        PB1.Camera as '@camera',
        PB1.Storage as '@storage',
        PB1.Screen_Size as '@screensize',
        PB1.OS as '@os',
        PB1.Processor as '@chip',
        PB1.Image1 as '@image',
        CB.Colour as '@colour'

    FROM dbo.Phone_Base PB1
    INNER JOIN dbo.Colour_Base CB ON CB.UID = PB1.Colour
    WHERE PB1.Active = 1 AND PB.Title = PB1.Title
    FOR XML PATH('colours'), TYPE
    )

FROM dbo.Phone_Base PB
WHERE PB.Active = 1
ORDER BY PB.ModelGroup

FOR XML PATH('phone'), TYPE

XML输出：

<phone group="iphone6s16gb">
<colours pid="16" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Space-Grey" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-space-grey.png" colour="Space Grey" />
<colours pid="17" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Gold" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-gold.png" colour="Gold" />
<colours pid="18" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Rose-Gold" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-rose-gold.png" colour="Rose Gold" />
<colours pid="19" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Silver" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-silver.png" colour="Silver" />
</phone>
<phone group="iphone6s16gb">
<colours pid="16" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Space-Grey" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-space-grey.png" colour="Space Grey" />
<colours pid="17" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Gold" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-gold.png" colour="Gold" />
<colours pid="18" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Rose-Gold" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-rose-gold.png" colour="Rose Gold" />
<colours pid="19" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Silver" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-silver.png" colour="Silver" />
</phone>
<phone group="iphone6s16gb">
<colours pid="16" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Space-Grey" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-space-grey.png" colour="Space Grey" />
<colours pid="17" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Gold" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-gold.png" colour="Gold" />
<colours pid="18" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Rose-Gold" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-rose-gold.png" colour="Rose Gold" />
<colours pid="19" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Silver" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-silver.png" colour="Silver" />
</phone>
<phone group="iphone6s16gb">
<colours pid="16" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Space-Grey" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-space-grey.png" colour="Space Grey" />
<colours pid="17" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Gold" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-gold.png" colour="Gold" />
<colours pid="18" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Rose-Gold" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-rose-gold.png" colour="Rose Gold" />
<colours pid="19" brand="1" title="iPhone 6S 16GB" url="iPhone-6S-16GB-Silver" camera="12" storage="16GB" screensize="4.7" os="iOS" chip="A9" image="iphone6s-silver.png" colour="Silver" />
</phone>

---

如果没有实际的桌子，这是在阅读魔法玻璃灯泡，但它可能是这样的：

SELECT 

PB.ModelGroup as '@group',

    (SELECT

        PB1.UID as '@pid',
        PB1.Brand as '@brand',
        PB1.Title as '@title',
        PB1.Friendly_URL_Name as '@url',
        PB1.Camera as '@camera',
        PB1.Storage as '@storage',
        PB1.Screen_Size as '@screensize',
        PB1.OS as '@os',
        PB1.Processor as '@chip',
        PB1.Image1 as '@image',
        CB.Colour as '@colour'

    FROM dbo.Phone_Base PB1
    INNER JOIN dbo.Colour_Base CB ON CB.UID = PB1.Colour
    WHERE PB1.ModelGroup=PB.ModelGroup
      AND PB1.Active = 1 
      AND PB.Title = PB1.Title
    FOR XML PATH('colours'), TYPE
    )

FROM dbo.Phone_Base PB
WHERE PB.Active = 1
GROUP BY PB.ModelGroup

FOR XML PATH('phone'), TYPE

---

GROUP BY

会将外部

SELECT

减少到每个模型组一行。子选择将模型组添加到

WHERE

-子句中，从而仅返回相关行…

最终和工作存储过程，这要感谢@Shnugo作为指针

SELECT 
    PB.Title as '@group',
    (SELECT
        PB1.UID as '@pid',
        PB1.Brand as '@brand',
        PB1.Title as '@title',
        PB1.Friendly_URL_Name as '@url',
        PB1.Camera as '@camera',
        PB1.Storage as '@storage',
        PB1.Screen_Size as '@screensize',
        PB1.OS as '@os',
        PB1.Processor as '@chip',
        PB1.Image1 as '@image',
        CB.Colour as '@colour'
    FROM 
        dbo.Phone_Base PB1
    INNER JOIN 
        dbo.Colour_Base CB ON CB.UID = PB1.Colour
    WHERE 
        PB1.Active = 1 AND PB.Title = PB1.Title
    FOR XML PATH('colours'), TYPE
    )
FROM 
    dbo.Phone_Base PB
WHERE 
    PB.Active = 1
GROUP BY 
    PB.Title
FOR XML PATH('phone'), TYPE

---

用于发布

表数据的Thx，但这并没有真正的帮助：缺少连接的颜色表，请：将您的输入减少到实际问题（例如ommit not REQUIRED列），一些真正的SQL代码与表，插入和您自己的尝试，使其复制粘贴为我们…感谢您的答复。由于where子句将分组改回标题，无法使用您的准确响应。可能足以将
PB.Active
添加到分组列表谢谢，您的回答为我指明了正确的方向，请参见下文。
SELECT 

PB.ModelGroup as '@group',

    (SELECT

        PB1.UID as '@pid',
        PB1.Brand as '@brand',
        PB1.Title as '@title',
        PB1.Friendly_URL_Name as '@url',
        PB1.Camera as '@camera',
        PB1.Storage as '@storage',
        PB1.Screen_Size as '@screensize',
        PB1.OS as '@os',
        PB1.Processor as '@chip',
        PB1.Image1 as '@image',
        CB.Colour as '@colour'

    FROM dbo.Phone_Base PB1
    INNER JOIN dbo.Colour_Base CB ON CB.UID = PB1.Colour
    WHERE PB1.ModelGroup=PB.ModelGroup
      AND PB1.Active = 1 
      AND PB.Title = PB1.Title
    FOR XML PATH('colours'), TYPE
    )

FROM dbo.Phone_Base PB
WHERE PB.Active = 1
GROUP BY PB.ModelGroup

FOR XML PATH('phone'), TYPE

SELECT 
    PB.Title as '@group',
    (SELECT
        PB1.UID as '@pid',
        PB1.Brand as '@brand',
        PB1.Title as '@title',
        PB1.Friendly_URL_Name as '@url',
        PB1.Camera as '@camera',
        PB1.Storage as '@storage',
        PB1.Screen_Size as '@screensize',
        PB1.OS as '@os',
        PB1.Processor as '@chip',
        PB1.Image1 as '@image',
        CB.Colour as '@colour'
    FROM 
        dbo.Phone_Base PB1
    INNER JOIN 
        dbo.Colour_Base CB ON CB.UID = PB1.Colour
    WHERE 
        PB1.Active = 1 AND PB.Title = PB1.Title
    FOR XML PATH('colours'), TYPE
    )
FROM 
    dbo.Phone_Base PB
WHERE 
    PB.Active = 1
GROUP BY 
    PB.Title
FOR XML PATH('phone'), TYPE