将 XML 数据插入到具有多个节点的 SQL 表中

Question

所以我有以下 XML：

     <NIACList>
<NIAC>
        <Number></Number>
        <SubmissionDate></SubmissionDate>
        <ExpirationDate  />
        <IssuerIDNO></IssuerIDNO>
        <IssuerName></IssuerName>
        <SuspensionPeriod/>
        <Cessation>
          <Basis  />
          <Date  />
        </Cessation>
        <Merchant>
          <IDNx></IDNx>
          <Name></Name>
          <Address>
            <Region></Region>
            <Locality></Locality>
            <Street></Street>
            <House></House>
            <Block  />
            <Flat  />
            <Phone  />
            <Fax  />
            <Email  />
          </Address>
        </Merchant>
        <CommercialUnit>
          <IDNx  />
          <Name  />
          <Type></Type>
          <Area></Area>
          <Location></Location>
          <Address>
            <Region></Region>
            <Locality></Locality>
            <Street></Street>
            <House></House>
            <Block  />
            <Flat  />
          </Address>
          <Activities>
            <Activity>
              <Code></Code>
              <Name></Name>
            </Activity>
          </Activities>
          <Goods>
            <Good>
              <Name></Name>
            </Good>
          </Goods>
          <WorkProgram  />
          <PublicSupplyUnit>
            <Capacity  />
            <TerraceCapacity  />
          </PublicSupplyUnit>
          <TradingAlcohol  />
          <TradingBeer  />
          <TradingTobaccoProducts  />
          <AmbulatoryTrading  />
          <MobileUnitTrading></MobileUnitTrading>
          <MobileUnit>
            <Type  />
            <Length  />
            <Width  />
            <Height  />
          </MobileUnit>
          <CommercialApparatusTrading></CommercialApparatusTrading>
          <CommercialApparatus>
            <Count  />
            <Length  />
            <Width  />
            <Height  />
          </CommercialApparatus>
        </CommercialUnit>
        <Modifications  />
      </NIAC>
</NIACList>

这是我创建的表的脚本：

    create table Merchant (
        IdMerchant int identity  primary key,
        IDNX nvarchar(max) null,
        Name nvarchar(max) null,
        WorkProgram datetime2 null,
        IdAddress int 
        );
    create table Address (
    IdAddress int identity  primary key,
    Region nvarchar(60) null,
    Locality nvarchar(50) null,
    Street nvarchar (60) null,
    House nvarchar (10) null,
    Block nvarchar (10) null,
    Flat nvarchar(10) null,
    Phone nvarchar(30) null,
    Fax nvarchar(60) null,
    Email nvarchar(60) null
    
    );

create table CommercialUnit (
IDCommercialUt int identity primary key,
IDNx nvarchar(90) null,
Name nvarchar(90) null,
Type nvarchar(90) null,
Area int null,
Location nvarchar(50) null,
TerraceCapacity float null,
TradingAlcohol bit null,
TradingBeer bit null,
TradingTobaccoProducts bit null,
AmbulatoryTrading bit null,
MobileUnitTrading bit null,
CommercialApparatusTrading bit null,
IDActivities int ,
IDGoods int ,
IDMobileUnit int ,
IDCommercial int ,
IDPSU int 
);

我不太擅长 XML，但问题是： 我有表Merchant 和Address。问题是，节点地址重复了2 次（在Merchant 和CommercialUnit 节点中），并且有不同的数据。我的任务是以某种方式指定插入，所以我要插入的数据将分为两类，一类用于Merchant节点，另一类用于CommercialUnit。插入地址后，记录必须与Merchant和CommercialUnit的外键链接（ IdAddress)，所以数据也会插入到这里。

我尝试插入数据，但它是从 CommercialUnit 节点插入的。 下面是插入代码：

INSERT INTO Address(Region,Locality,Street,House,Block,Flat,Phone,Fax,Email)
        SELECT 
        Region=c.value('Region[1],','nvarchar(60)'),
        Locality=c.value('Locality[1],','nvarchar(50)') ,
        Street=c.value('Street[1],','nvarchar(60)') ,
        House=c.value('House[1],','nvarchar(10)') ,
        Block=c.value('Block[1],','nvarchar(10)') ,
        Flat=c.value('Flat[1],','nvarchar(10)') ,
        Phone=c.value('Phone[1],','nvarchar(30)') ,
        Fax=c.value('Fax[1],','nvarchar(60)') ,
        Email=c.value('Email[1],','nvarchar(60)') 
    FROM @xml.nodes('/NIACList/NIAC/Merchant/Address') Address(c)

Answer 1

您需要依次执行四个INSERT 语句：

1. INSERT INTO Address ...（针对商家），并将其新生成的身份值捕获到变量中。
2. INSERT INTO Merchant ... 并使用上面的变量。
3. INSERT INTO Address ...（用于 CommercialUnit），并捕获其新 将标识值生成到变量中。
4. INSERT INTO CommercialUnit ... 并使用上面的变量。

概念 SQL

DECLARE @IdAddress INT;

-- Merchant
INSERT INTO Address ...

-- get last IDENTITY value for the Address table
SET @IdAddress = SCOPE_IDENTITY();

INSERT INTO Merchant ...

-- CommercialUnit
INSERT INTO Address ...

-- get last IDENTITY value for the Address table
SET @IdAddress = SCOPE_IDENTITY();

INSERT INTO CommercialUnit ...

Answer 2

一种方法是使用cross apply。如果您只需要不同的地址，

SELECT distinct t.*             
    FROM @xml.nodes('/NIACList/NIAC') niac(n)
    cross apply (
      select  Region=c.value('Region[1],','nvarchar(60)'),
        Locality=c.value('Locality[1],','nvarchar(50)') ,
        Street=c.value('Street[1],','nvarchar(60)') ,
        House=c.value('House[1],','nvarchar(10)') ,
        Block=c.value('Block[1],','nvarchar(10)') ,
        Flat=c.value('Flat[1],','nvarchar(10)') ,
        Phone=c.value('Phone[1],','nvarchar(30)') ,
        Fax=c.value('Fax[1],','nvarchar(60)') ,
        Email=c.value('Email[1],','nvarchar(60)') 
        from niac.n.nodes('Merchant/Address') ma(c)
      union
      select  Region=c.value('Region[1],','nvarchar(60)'),
        Locality=c.value('Locality[1],','nvarchar(50)') ,
        Street=c.value('Street[1],','nvarchar(60)') ,
        House=c.value('House[1],','nvarchar(10)') ,
        Block=c.value('Block[1],','nvarchar(10)') ,
        Flat=c.value('Flat[1],','nvarchar(10)') ,
        Phone=c.value('Phone[1],','nvarchar(30)') ,
        Fax=c.value('Fax[1],','nvarchar(60)') ,
        Email=c.value('Email[1],','nvarchar(60)') 
        from niac.n.nodes('CommercialUnit/Address') ua(c)
    ) t