Insert XML Data Into SQL Table with Foreign Keys

Question

I have this XML File (there is data, but I deleted it for a purpose):

<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>

My task is to insert all XML data from this file into SQL Tables (SQL Server). I've inserted in most of the tables data, but here it is a problem. I have tables Address and Merchant . The first table doesn't have a foreign key, but the second table contains one, named IdAddress , so they could be relational. Is it possible to insert data into Merchant , so for each record from table Address will be linked with the IdAddress from Merchant .

Any help will be appreciated.

Answer 1

You need to insert the XML data in a buffer table - for example #temporary table. Then, first get the unique values that can be referred by the foreign key. Insert the one that do not exists. After that, join the #temporary table with the referenced table by the value and insert the value ID rather then the value.