It is related to Linux, Oracle 9.2.0. I am new to Oracle.

I am trying to connect to Oracle database say A, but as I am running this command dbstart the error is

“ORA-12514: TNS: listener could not resolve SERVICE_NAME given in connect descriptor”

I have successfully started lsnrctl. Here are respective ora files. Please tell me where I am wrong?

My ORACLE_HOME is set as:
/home/oracle/product/9.2.0

Here are my tnsnames.ora, listener.ora & sqlnet.ora files. For clarification database names are "Pana" & "Pana2", host name is "pana".

TNSNAMES.ORA::
PANA2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)
(HOST = pana)(PORT = 1521)

(CONNECT_DATA = (SERVER = DEDICATED)
(SERVICE_NAME = Pana)
)
)

PANA =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)
(HOST = pana)(PORT = 1521)
(CONNECT_DATA = (SERVER = DEDICATED)
(SERVICE_NAME = Pana)
)
)


LISTENER.ORA:

LISTENER =
(ADDRESS = (PROTOCOL = TCP) (HOST = pana)(PORT = 1521))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DES =
(GLOBAL_DBNAME = Pana2)
(ORACLE_HOME = /home/oracle/product/9.2.0)
(SID_NAME = Pana)
)
(SID_DES =
(GLOBAL_DBNAME = Pana)
(ORACLE_HOME = /home/oracle/product/9.2.0)
(SID_NAME = Pana)
)
)

SQLNET.ORA::
SQLNET.AUTHENICATION_SERVICE = (NONE)
NAMES.DEFAULT_DOMAIN = localadmin
NAMES.DIRECTORY_PATH = (TNSNAMES, ONAMES, HOSTNAME)
NAMES.PREFERRED_SERVERS =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = TCP)
(PORT = 1521)
(HOST = Pana2)
)
(ADDRESS =
(PROTOCOL = TCP)
(PORT = 1521)
(HOST = Pana)
)
)

This error is primarily caused by:
1. Syntax error or other error in tnsnames.ora make sure parentheses match
2. HOST string in TNSNAMES does not resolve. you have pana can you tnsping pana?
3. CONNECT_DATA - I do not see that inyour tnsnames

Instead of me doing this by remote control, you do it using this guide:
ORA-12154 - Oracle FAQ

Check everything, assume nothing on your side is correct.

I have corrected the syntax error as:

TNSNAMES.ORA::
PANA2 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)
(HOST = pana)(PORT = 1521)

(CONNECT_DATA = (SERVER = DEDICATED))
(SERVICE_NAME = Pana)
)
)

&

have changed SID_DES to SID_DESC in listener.ora.

Also tnsping host pana & the reply is OK.

There is CONNECT_DATA in tnsnames.

Does initorcl.ora has any thing to do with this problem, I have copied & rename "initorcl.ora" as "initPana.ora", will be of great help if you will help me in this regard, it is verry important for me to resove this issue ASAP.

Thanks for your cooperation, this problem is resolved. There is another necessary file which play an important role is names.ora which was not there in my machine. I created that file accordingly, & check the syntax in tnsnames.ora, listener.ora & sqlnet.ora.

Thank you all