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 IdInvernadero="3" IdProducto="3" IdCaracteristica1="1" IdCaracteristica2="2" Cantidad ="72" Folio="4568457" />

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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