Oracle 10g: ORA-12154 when connect to database with newly created user

问题

This is the continue topic with this topic:

Oracle 10g: Error when creating database manually by scripts

Basically, I had created an Oracle database named "testdb" using only batch scripts and SQL scripts.

After successfully creating a database using script, I create a script to create user for client connect to the database.

CreateUser.bat

sqlplus sys/test as sysdba @D:\Script\CreateUser.sql

CreateUser.sql

shutdown immediate;
startup;
CREATE USER usr1 IDENTIFIED BY usr1
    DEFAULT TABLESPACE users
    QUOTA UNLIMITED ON users;
GRANT CREATE SESSION, GRANT ANY privilege TO usr1;
exit;

Everything run ok, with no error.

Then I try to test by connecting to SQLPlus on cmd:

sqlplus usr1/usr1@testdb

This retrun the error:

ORA-12154: TNS:could not resolve the connect identifier specified

I wonder what I did wrong.

The same happen for the database I created via DBCA.

回答1:

The error is because you don't seem to have an entry for testdb in your tnsnames.ora file. You could add one, manually or with the configuration tools netca etc); or you could bypass that with the 'easy connect' syntax:

 sqlplus username/password@//hostname:port/service_name

If this is on your local machine, the default port and the service name matches the SID, that could be simolified a bit to:

sqlplus usr1/usr1@//localhost/testdb

You can verify the service name in v$parameters, or with lsnrctl services.

You can read more about connections and naming methods.

If your are connecting to a database on the same machine as the client, and you are using the same ORACLE_HOME, you don't need to use TNS/SQL*Net at all. With ORACLE_SID set to the right value, just doing this will connect locally:

sqlplus usr1/usr1

回答2:

you can sqlplus usr1/usr1@testdb when you create connect string. It means that you need to entry in tnsnames.ora file

来源：https://stackoverflow.com/questions/23782117/oracle-10g-ora-12154-when-connect-to-database-with-newly-created-user