How do you fix 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.

Can’t connect connect identifier specified?

This is one of the most common Oracle errors and it is basically telling you that you are trying to connect to a database name that is unknown to the system. The most common cause are typos in your connection string or network configuration files.

How do I edit Tnsnames Ora file in Windows?

Typically, the default location of the file tnsnames. ora is \NETWORK\ADMIN\. Save and close the tnsnames. ora file….

Updating the tnsnames.ora files
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Where is Tnsnames Ora file located?

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

How do I know if TNS listener is running on Linux?

Answer

  1. Log in to the SUSE Linux as user oracle.
  2. On the command line interface (CLI), run the following command to view the state of the Oracle listener: > lsnrctl status Listener name.

How do I uninstall Oracle client from Windows?

Procedure for Removing Oracle Database Client with Oracle Universal Installer

  1. Ensure that you first follow the instructions in “Stopping Oracle Services on Windows”.
  2. Start Oracle Universal Installer.
  3. Click the Deinstall Products button.
  4. Select the Oracle home you wish to remove.
  5. Check the boxes of components to remove.

How do I fix ORA 12545 error?

Action: Ensure the ADDRESS parameters have been entered correctly; the most likely incorrect parameter is the node name. Ensure that the executable for the server exists (perhaps “oracle” is missing.) If the protocol is TCP/IP, edit the TNSNAMES. ORA file to change the host name to a numeric IP address and try again.

How do I connect to Tnsnames Ora?

Specifying a Connection by Configuring a tnsnames. ora File

  1. Run Oracle Universal Installer.
  2. Select the Custom installation type.
  3. In the Available Product Components list, select Oracle Network Utilities and click Next.
  4. In the Summary window, click Install, then click Exit and Yes to exit Oracle Universal Installer.

How do I open Tnsnames Ora file in Windows?

Directions:

  1. Begin by clicking on Start > All Programs > Accessories.
  2. Right-click on Notepad and select Run as administrator.
  3. In Notepad, click on File > Open.
  4. Locate the folder where you installed the Oracle Client (ORACLE_HOME).
  5. If files named tnsnames.

What is TNS details in Oracle?

Transparent Network Substrate (TNS), a proprietary Oracle computer-networking technology, supports homogeneous peer-to-peer connectivity on top of other networking technologies such as TCP/IP, SDP and named pipes. TNS operates mainly for connection to Oracle databases.

What to do if Oracle could not resolve the connect identifier specified?

I have specified some ways to resolve the error ‘ORA-12154: TNS:could not resolve the connect identifier specified’ which is frequent error on Oracle. Hope you like this article.If you like this article don’t forget to share it.

When does TNS could not resolve the connect identifier specified error?

ORA-12154: TNS could not resolve the connect identifier specified error comes when you try to connect Oracle database using clients/tools like SQL Plus, Toad, Oracle Forms, Oracle Reports, and SQL*Net could not find the alias specified for a connection in the TNSNAMES.ORA file or other naming adapters.

When does Oracle get an ora-12154 error?

ORA-12154 error is very common error related to ‘tnsnames.ora’ file.This error will come when oracle is unable to locate the service name specified in ODBC data source.ORA-12154 error will come at local service when application tries to connect with remote server.This error will come in following situations : Situation 1 :

What is the most common Oracle connect error?

While working with different functionalities ; the oracle developers are facing different types of errors.The most common error coming while connecting database is ORA-12154: TNS:could not resolve the connect identifier specified .

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