SQL for xml 自动元素包装节点

Question

我有以下代码：

SELECT distinct 
msi.SupplierNumber
    ,Province.[Name] [ProvinceName]
    ,District.[Code] [DistrictCode]
    ,District.[Name] [DistrictName]
    ,Municipality.[Code] [MunicipalityCode]
    ,Municipality.[Name] [MunicipalityName]
    ,City.[Code] [CityCode]
    ,City.[Name] [CityName]
    ,Suburb.[Code] [SuburbCode]
    ,Suburb.[Name] [SuburbName]
    ,Ward.[Code] [WardCode]
FROM
    dbo.MasterSupplierIdentification msi WITH (NOLOCK)
    INNER JOIN dbo.[LinkMasterSupplierCommodity] lmsc WITH (NOLOCK) ON lmsc.MasterSupplierIdentificationID = msi.MasterSupplierIdentificationID
    INNER JOIN dbo.[MasterCommodityGroup] mcg WITH (NOLOCK) ON mcg.[MasterCommodityGroupID] = lmsc.MasterCommodityID
    INNER JOIN dbo.[MasterCommodityLocation] mcl WITH (NOLOCK) ON mcl.[MasterCommodityID] = mcg.[MasterCommodityID]
    INNER JOIN dbo.[MDWard] Ward WITH (NOLOCK) ON Ward.[WardID] = mcl.[WardID]
    INNER JOIN dbo.[MDSuburb] Suburb WITH (NOLOCK) ON Suburb.[SuburbID] = Ward.[SuburbID]
    INNER JOIN dbo.[MDCity] City WITH (NOLOCK) ON City.[CityID] = Suburb.[CityID]
    INNER JOIN dbo.[MDMunicipality] Municipality WITH (NOLOCK) ON Municipality.[MunicipalityID] = City.[MunicipalityID]
    INNER JOIN dbo.[MDDistrict] District WITH (NOLOCK) ON District.[DistrictID] = Municipality.[DistrictID]
    INNER JOIN dbo.[MDProvince] Province WITH (NOLOCK) ON Province.[ProvinceID] = District.[ProvinceID]
WHERE 
    msi.SupplierNumber = 'MAAA0000002'
    and Suburb.Code = '181001001'
for xml auto, Root('Suppliers'), elements xsinil

返回：

<Suppliers xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <msi>
        <SupplierNumber>MAAA0000002</SupplierNumber>
        <Province>
        <ProvinceName>Western Cape</ProvinceName>
            <District>
            <DistrictCode>105</DistrictCode>
            <DistrictName>Central Karoo</DistrictName>
                <Municipality>
                <MunicipalityCode>181</MunicipalityCode>
                <MunicipalityName>Laingsburg</MunicipalityName>
                    <City>
                    <CityCode>181001</CityCode>
                    <CityName>Laingsburg NU</CityName>
                        <Suburb>
                        <SuburbCode>181001001</SuburbCode>
                        <SuburbName>Laingsburg NU</SuburbName>
                            <Ward>
                                <WardCode>1</WardCode>
                            </Ward>
                            <Ward>
                                <WardCode>12</WardCode>
                            </Ward>
                            <Ward>
                                <WardCode>2</WardCode>
                            </Ward>
                       </Suburb>
                   </City>
               </Municipality>
           </District>
       </Province>
  </msi>

在此特定示例中，Wards 重复。我想把它包裹在一个父节点中。似乎唯一的方法是使用子查询，我在子查询中指定的不是AUTO而是PATH和ROOT，并将其作为TYPE返回。

Answer 1

你的最后一句话是正确的。如果您想查看嵌套在父节点中的数据（1:many 关系），则必须将它们包含为一个块。

一个提示：你在任何地方都使用WITH (NOLOCK)。除非您真的知道自己在做什么，除非您有充分的理由这样做，否则这是一件危险的事情。很常见，但不是很好的做法...

像这样尝试（未经测试）：

SELECT distinct 
msi.SupplierNumber
    ,Province.[Name] [ProvinceName]
    ,District.[Code] [DistrictCode]
    ,District.[Name] [DistrictName]
    ,Municipality.[Code] [MunicipalityCode]
    ,Municipality.[Name] [MunicipalityName]
    ,City.[Code] [CityCode]
    ,City.[Name] [CityName]
    ,Suburb.[Code] [SuburbCode]
    ,Suburb.[Name] [SuburbName]

    ,WardXml.XmlAsBlock
FROM
    dbo.MasterSupplierIdentification msi WITH (NOLOCK)
    INNER JOIN dbo.[LinkMasterSupplierCommodity] lmsc WITH (NOLOCK) ON lmsc.MasterSupplierIdentificationID = msi.MasterSupplierIdentificationID
    INNER JOIN dbo.[MasterCommodityGroup] mcg WITH (NOLOCK) ON mcg.[MasterCommodityGroupID] = lmsc.MasterCommodityID
    INNER JOIN dbo.[MasterCommodityLocation] mcl WITH (NOLOCK) ON mcl.[MasterCommodityID] = mcg.[MasterCommodityID]
    INNER JOIN dbo.[MDWard] Ward WITH (NOLOCK) ON Ward.[WardID] = mcl.[WardID]
    INNER JOIN dbo.[MDSuburb] Suburb WITH (NOLOCK) ON Suburb.[SuburbID] = Ward.[SuburbID]
    INNER JOIN dbo.[MDCity] City WITH (NOLOCK) ON City.[CityID] = Suburb.[CityID]
    INNER JOIN dbo.[MDMunicipality] Municipality WITH (NOLOCK) ON Municipality.[MunicipalityID] = City.[MunicipalityID]
    INNER JOIN dbo.[MDDistrict] District WITH (NOLOCK) ON District.[DistrictID] = Municipality.[DistrictID]
    INNER JOIN dbo.[MDProvince] Province WITH (NOLOCK) ON Province.[ProvinceID] = District.[ProvinceID]

    CROSS APPLY
    (
      SELECT WardCode FROM dbo.[MDWard] Ward WITH (NOLOCK) 
      WHERE Ward.[WardID] = mcl.[WardID]
      FOR XML PATH('Ward'),TYPE
    ) AS WardXml(XmlAsBlock)
WHERE 
    msi.SupplierNumber = 'MAAA0000002'
    and Suburb.Code = '181001001'
for xml auto, Root('Suppliers'), elements xsinil