摘要：
http://psoug.org/reference/xmlquery.htmlGeneralNote:XMLQuery returns query results as XML. XMLTable returns results as relation data.Demo TablesCREATE TABLE person_data (person_id NUMBER(3),person_data XMLTYPE);Demo DataINSERT INTO person_data(person_id, person_data)VALUES(1, XMLTYPE('<PDReco 阅读全文
