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Return the data from XML as a table

declare @ColumnXML xml =
'<XmlValues>
  <XmlValue SomeId="1">aaaa</XmlValue>
  <XmlValue SomeId="2">bbbb</XmlValue>
  <XmlValue SomeId="3">cccc</XmlValue>
</XmlValues>
'
-- get all XML records
SELECT T.c.query('.') AS result 
FROM   @ColumnXML.nodes('/XmlValues/XmlValue') T(c) 

-- return the data from the xml as a table
SELECT T.c.value('@SomeId','nvarchar(100)') as SomeId,
              T.c.value('.', 'varchar(50)') as SomeValue
FROM   @ColumnXML.nodes('/XmlValues/XmlValue') T(c) 

-- also you can do filters:
where T.c.value('@SomeId','nvarchar(100)') = 2