Sunday, February 21, 2010

FOR XML

The following query returns data as XML
SELECT ContactID, FirstName, LastName, Phone
FROM Person.Contact
ORDER BY ContactID
FOR XML AUTO,ELEMENTS
However, there're some NULL values in Phone column and it makes some Phone tag disappeared in returned XML. You need to modify this query so that all tags appear in the XML document. What should you do?

A. Add an XML index to the table that contains the product data.
B. Add the XSINIL argument to the ELEMENTS directive in the query.
C. Add a HAVING clause to the query.
D. Add the replace value of clause to the query.

Answer:[B]
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Oracle Query