Example: Using XMLSERIALIZE to Serialize an XML Value to a BLOB Value - Teradata Vantage

When serializing to BLOB or VARBYTE, you can specify the desired encoding for the serialization. If any of the data in the document cannot be represented in the specified encoding, a character translation error occurs.

SELECT XMLSERIALIZE(DOCUMENT customerXML AS BLOB ENCODING "UTF-8"
   WITH BOM INCLUDING XMLDECLARATION)
FROM customer
WHERE customerID = 1;