How do I fix my ORA 12154?

Resolution

How do I fix my ORA 12154?

Resolution

  1. Option #1. Make sure that the TNSNAMES. ORA file exists and is in the correct directory.
  2. Option #2. Make sure that the service name that you are connecting to is included in the TNSNAMES. ORA file and that it is correctly defined.
  3. Option #3. Make sure that there are no syntax errors in the TNSNAMES. ORA file.

How do you resolve error ORA 12154 TNS could not resolve the connect identifier specified?

The Solution

  1. Make sure that “TNSNAMES” is listed as one of the values of the NAMES. DIRECTORY_PATH parameter in the Oracle Net profile (SQLNET.
  2. Verify that a TNSNAMES.
  3. Check that the net service name used as the connect identifier exists in the TNSNAMES.
  4. Make sure there are no syntax errors anywhere in the TNSNAMES.

What is the connect identifier?

A “connect identifier” is an identification string of a single set of connection information to a specific target database instance on a specific Oracle server. Connect identifiers are defined and stored in a file called tnsnames.ora located in $ORACLE_HOME/network/admin/ directory.

Where can I find Tnsnames Ora?

By default, the tnsnames. ora file is located in the ORACLE_HOME/network/admin directory. Oracle Net will check the other directories for the configuration file.

How do I fix ORA 12547 TNS lost contact when trying to connect to Oracle?

Solution

  1. Ensure the DB is up and running and you can connect locally AS SYSDBA to the database using Oracle binaries owner (usually oracle:oinstall Unix / Linux user). If it does not work, probably you encounter a different problem.
  2. Check privileges of an Oracle file on Unix / Linux host where database is running:

Where can I find TNSnames Ora?

How do I find my Oracle connect identifier?

A “connect identifier” is an identification string and which is used to identify the single set of connection information to a specific target database instance on a specific Oracle server. Connect identifiers are defined and stored in a file called tnsnames. ora located in $ORACLE_HOME/network/admin/ directory.

What is the default Oracle username and password?

Oracle Enterprise Manager displays the Database Control login page. Log in to the database using the user name SYS and connect as SYSDBA. Use the password that you specified for the SYS account during the installation.

What is the username and password for Oracle SQL Developer?

Username: Whatever user you have created or SYS or SYSTEM if you have not created a user yet. Password: The password for your user or the default password you entered for SYS and SYSTEM. Hostname: 127.0. 0.1 his is only the hostname if your are running SQL Developer on the same machine where your XE is installed.

Where is TNSnames Ora in Windows 10?

tnsnames. ora is located in the ORACLE_HOME\network\admin directory on Windows. Oracle home path is usually C:\app\oracle_account\product\12.1. 0\dbhome_1 in windows.

Where is TNSnames Ora file located in Windows 10?

ORACLE_HOME/network/admin directory
By default, the tnsnames. ora file is located in the ORACLE_HOME/network/admin directory.

How do you run relink all in Oracle?

Relinking Oracle Database Client Binaries After Installation

  1. Login as the Oracle Database Client owner user ( oracle ).
  2. Set the ORACLE_HOME environment variable.
  3. Go to the $ORACLE_HOME/bin directory:
  4. Run the relink script with the as_installed option to relink the binaries.

Where can I find Sqlnet Ora?

By default, the sqlnet. ora file is located in the ORACLE_HOME/network/admin directory. The sqlnet. ora file can also be stored in the directory specified by the TNS_ADMIN environment variable.

How do I find the database name in Oracle SQL Developer?

How to Find Out Your Oracle Database Name

  1. Through V$DATABASE. SQL> select name from V$database; NAME ——— XE.
  2. Through GLOBAL_NAME. GLOBAL_NAME has the default value of db_name + db_domain.
  3. Through dbms_utility.get_parameter_value.
  4. Summary.

How can I recover my Oracle username and password?

To unlock and reset user account passwords using SQL*Plus:

  1. Start SQL*Plus and log in as the SYS user, connecting as SYSDBA: $ sqlplus /nolog SQL> CONNECT SYS/SYS_password AS SYSDBA.
  2. Enter a command similar to the following, where account is the user account that you want to unlock and password is the new password:

How do I find my Oracle system password?

5 Answers

  1. Open your SQL command line and type the following: SQL> connect / as sysdba.
  2. Once connected,you can enter the following query to get details of username and password:
  3. This will list down the usernames,but passwords would not be visible.