Ottenere valori dal campo del tipo XML utilizzando nel server SQL

Prova questo:

DECLARE @test TABLE(ID INT, XmlCol XML)

INSERT INTO @test VALUES(1, '<doc>
   <quote>
      <code>AA</code>
   </quote>
   <quote>
      <code>BB</code>
   </quote>
   <quote>
      <code>CC</code>
   </quote>
</doc>')

INSERT INTO @test VALUES(2, '<doc>
   <quote>
      <code>BB</code>
   </quote>
   <quote>
      <code>AA</code>
   </quote>
   <quote>
      <code>CC</code>
   </quote>
</doc>')

SELECT
    ID,
    X.Doc.value('(quote/code)[1]', 'varchar(20)') AS 'Code1',
    X.Doc.value('(quote/code)[2]', 'varchar(20)') AS 'Code2',
    X.Doc.value('(quote/code)[3]', 'varchar(20)') AS 'Code3'
FROM @test
CROSS APPLY xmlcol.nodes('doc') AS X(Doc)

Ti dà un output di:

ID  Code1   Code2   Code3
1   AA  BB  CC
2   BB  AA  CC