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copied!<p>Based on Recep's answer (see comments) I created the following solution for this problem:</p> <p><strong>1. Create a recursive function</strong></p> <pre><code>CREATE function SelectChild(@key as int) returns xml begin return ( select IdIndustry as "@key", ParentId as "@parentkey", IndustryCode as "@Code", IndustryName as "@Name", dbo.SelectChild(IdIndustry) from tblIndustryCodes where ParentId = @key for xml path('record'), type ) end </code></pre> <p><strong>2. Build a SELECT statement, that calls the function</strong></p> <pre><code>SELECT IdIndustry AS "@key", '' AS "@parentkey", IndustryCode as "@Code", IndustryName as "@Name", dbo.SelectChild(IdIndustry) FROM dbo.tblIndustryCodes WHERE ParentId is null FOR XML PATH ('record') </code></pre> <p>This creates a hierarchical XML, no matter how deep the tree actually is:</p> <pre><code><record key="1" parentkey="" Code="IND" Name="Industry"> <record key="2" parentkey="1" Code="AUTO" Name="Automotive" /> <record key="3" parentkey="1" Code="PHARM" Name="Pharmaceuticals" /> </record> <record key="4" parentkey="" Code="FIN" Name="Finance"> <record key="5" parentkey="4" Code="CFIN" Name="Corporate Finance"> <record key="6" parentkey="5" Code="CMRKT" Name="Capital Markets" /> </record> </record> <record key="7" parentkey="" Code="CON" Name="Cosulting"> <record key="8" parentkey="7" Code="IMPL" Name="Implementation" /> <record key="9" parentkey="7" Code="STRAT" Name="Strategy" /> </record> </code></pre>

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