在SQL Server中创建XML时，如何在CDATA标记中包装值？

Question

如何在CDATA中包装OldValue？

SELECT
1 AS Tag,
0 AS Parent,
(
    SELECT PositionDescription AS 'data()'
     FROM dbo.Project where ID = 32
     FOR XML PATH('')
) AS 'PositionDescription!1!OldValue!CDATA'
FOR XML EXPLICIT, TYPE