How can I convert XML data to a SQL Server table using XQuery?

Converting XML Data to a Table in SQL Server

In SQL Server, you can convert XML data into a tabular format using the XML data type and XQuery expressions. Here's how:

Approach 1: Using Node Value Extractor

Suppose you have an XML document with data formatted like the following:

<row>
    <idinvernadero>8</idinvernadero>
    <idproducto>3</idproducto>
    <idcaracteristica1>8</idcaracteristica1>
    <idcaracteristica2>8</idcaracteristica2>
    <cantidad>25</cantidad>
    <folio>4568457</folio>
</row>
<row>
    <idinvernadero>3</idinvernadero>
    <idproducto>3</idproducto>
    <idcaracteristica1>1</idcaracteristica1>
    <idcaracteristica2>2</idcaracteristica2>
    <cantidad>72</cantidad>
    <folio>4568457</folio>
</row>

To convert this XML into a table, you can use the following XQuery expression:

SELECT  
       Tbl.Col.value('IdInvernadero[1]', 'smallint'),  
       Tbl.Col.value('IdProducto[1]', 'smallint'),  
       Tbl.Col.value('IdCaracteristica1[1]', 'smallint'),
       Tbl.Col.value('IdCaracteristica2[1]', 'smallint'),
       Tbl.Col.value('Cantidad[1]', 'int'),
       Tbl.Col.value('Folio[1]', 'varchar(7)')
FROM   @xml.nodes('//row') Tbl(Col)

Approach 2: Using Attribute Value Extractor

Alternatively, if your XML data is formatted with attributes instead of nodes, such as:

<row idinvernadero="8" idproducto="3" idcaracteristica1="8" idcaracteristica2="8" cantidad="25" folio="4568457"></row>
<row idinvernadero="3" idproducto="3" idcaracteristica1="1" idcaracteristica2="2" cantidad="72" folio="4568457"></row>

You can use the following XQuery expression:

SELECT  
       Tbl.Col.value('@IdInvernadero', 'smallint'),  
       Tbl.Col.value('@IdProducto', 'smallint'),  
       Tbl.Col.value('@IdCaracteristica1', 'smallint'),
       Tbl.Col.value('@IdCaracteristica2', 'smallint'),
       Tbl.Col.value('@Cantidad', 'int'),
       Tbl.Col.value('@Folio', 'varchar(7)')

FROM   @xml.nodes('//row') Tbl(Col)

This query will extract the values from the XML attributes and convert them into a tabular format.

References:

• [http://kennyshu.blogspot.com/2007/12/convert-xml-file-to-table-in-sql-2005.html](http://kennyshu.blogspot.com/2007/12/convert-xml-file-to-table-in-sql-2005.html)
• [http://msdn.microsoft.com/en-us/library/ms345117(SQL.90).aspx](http://msdn.microsoft.com/en-us/library/ms345117(SQL.90).aspx)

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