官方參考文檔：XML DB Developer's Guide(11.2)
1、帶有XMLType字段的表操作
-- Create table
create table T_XML_TEST
(
id NUMBER,
xml_value XMLTYPE
);--使用xmltype數據類型的靜態方法createxml插入xml數據
INSERT INTO T_XML_TEST(id, xml_value) VALUES (1, XMLType.CreateXML(
'<?xml version="1.0"?>
<Envelope>
<Body>
<sayHelloResponse>
<return>94065中國 say: hello [axis2]</return>
</sayHelloResponse>
</Body>
</Envelope>''));--查詢帶xmltype類型字段的表的方法
select t.id, t.xml_value.getclobval() xml_value from T_XML_TEST t;
2、XMLTABLE函數使用，檢索xml節點的值
（1）xml不帶命名空間，如下xml：
<?xml version="1.0"?>
<Envelope>
<Body>
<sayHelloResponse>
<return>94065中國 say: hello [axis2]</return>
</sayHelloResponse>
</Body>
</Envelope>示例：
SELECT t."return", t."return2"
FROM
XMLTABLE(XMLNAMESPACES('http://www.w3.org/2003/05/soap-envelope' as "soap",
'http://ws.apache.org/axis2' as "tns"
)
,'/Envelope' PASSING Xmltype.createxml(
'<?xml version="1.0"?>
<Envelope>
<Body>
<sayHelloResponse>
<return>94065中國 say: hello [axis2]</return>
</sayHelloResponse>
</Body>
</Envelope>'
)
COLUMNS
"return" varchar2(100) PATH '/Envelope/Body/sayHelloResponse/return'
,"return2" varchar2(100) PATH '/Envelope/Body/sayHelloResponse/return'
) t;輸出結果：
（2）xml帶有命名空間，如下xml：
<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://ws.apache.org/axis2">
<soap:Body>
<tns:delete>
<tns:record_id>7352</tns:record_id>
</tns:delete>
</soap:Body>
</soap:Envelope>示例：
SELECT t."return", t."return2"
FROM
XMLTABLE(XMLNAMESPACES('http://www.w3.org/2003/05/soap-envelope' as "soap",
'http://ws.apache.org/axis2' as "tns"
)
,'/soap:Envelope' PASSING Xmltype.createxml(
'<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://ws.apache.org/axis2">
<soap:Body>
<tns:delete>
<tns:record_id>7352</tns:record_id>
</tns:delete>
</soap:Body>
</soap:Envelope>'
)
COLUMNS
"return" varchar2(10) PATH '/soap:Envelope/soap:Body/tns:delete/tns:record_id'
,"return2" varchar2(10) PATH '/soap:Envelope/soap:Body/tns:delete/tns:record_id'
) t輸出結果：
（3）附加where條件
SELECT t.id, t.xml_value.getclobval(), t2."return"
FROM T_XML_TEST t,
XMLTABLE(XMLNAMESPACES('http://www.w3.org/2003/05/soap-envelope' as "soap",
'http://ws.apache.org/axis2' as "tns"
)
,'/soap:Envelope' PASSING t.xml_value COLUMNS
"return" varchar2(10) PATH '/soap:Envelope/soap:Body/tns:delete/tns:record_id') t2
where t.id = 254;