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4.2

Loading XML straight into the DB

Asked by jasww in Extensible Markup Language (XML), Extensible HTML (XHTML)

Tags: xml

Hi
I have been tasked with loading some relational data into the database.  I want to utilise the XML-based power of Ado.net.
I can write out data expressed in two tables to XML easily enough when there is a PK-FK relationship between the two source tables.

The XML could be an object serialised to file, or it could be a dataset from someone else's DB.

The tables look like this:

Parent
  Parent_id (PK, uniqueidentifier)
  Parent_A
  Parent_B
  Parent_Z (has a default value)

Child:
   Child_ID  (PK, uniqueidentifier)
   Child_Parent_Id (FK, uniqueidentifier)
   Child_X
   Child_Y
   Child_Z (has a defualt value)

The select staement to use is of course
       select * from Parent inner join child on parent.parent_id = child.child_parent_id
 

But what about loading data from XML into the DB when the XML source data is nested but there are no IDs?

e.g.
<dataset>
   <parent>
      <A>   I am A </A>
      <B>   I am B </B>
      <childrow>  
            <X>I am x </Y>
            <Y>I am y </Y>
      </childrow>
      <childrow>  
            <X>I am another x </Y>
            <Y>I am another y  </Y>
      </childrow>
   <parent>
</dataset>

 

There can be 1+ children per parent.  


Please advise how to load this XML into the relational database, taking care to note that:
   a) source tag names are not necissarily the same as the target column names
   b) source tag names for child and parent are not necessarily the same as the target table names in the DB
   c) IDs used for PK and FK in the resulting tables are uniqueidentifiers.
  d) there are additional columns in the tables which do not have nodes in the XML (but these columns have default values)



Many thanks
Daniel


ps.  SQL 2000, VS2003, .net 1.1, windows server 2003.
[+][-]11/19/06 05:33 PM, ID: 17976607Accepted Solution

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Zones: Extensible Markup Language (XML), Extensible HTML (XHTML)
Tags: xml
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Solution Provided By: DarthMod
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Solution Grade: B
 
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