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Cannot connect to a fresh installed Oracle 11g XE ." ORA-12505 TNS Listener does not currently knows

edited Sep 27, 2012 6:13AM in Database Networking (MOSC) 6 commentsAnswered ✓
HI Gurus
For training purpouses I downloaded and installed  Oracle 11.2.0   XE at a Windows XP box.

I can connect with sqlplus uitility using ( I suppose ) default service.  That is if I try  sqlplus SYSTEMUSERID/PASSWORD  I can connect and create shemas and etc ...

But when I try to connect using a client , a jdbc connection , or a ODBC one , I got this error :

ORA-12505 TNS Listener does not currently knows the service

or this one

ORA-12514 TNS Listener does not currently knows the service in cconect descriptor.

I chek a lot of forums but I just cannot get it work.

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