How to solve ora12154 cannot resolve the specified connection identifier

ORA-12154 error indicates that the database does not recognize the connection identifier. Common causes include typographical errors, non-existent connection identifiers, insufficient permissions, database unavailability, or network problems. Solutions include checking the connection identifier, confirming the connection identifier, checking permissions, checking database status, and checking network connectivity. If the above steps do not resolve the issue, contact your database administrator for assistance.

ORA-12154: The specified connection identifier cannot be resolved

This error message ORA-12154 indicates that the database cannot Identify the connection identifier you provided. A connection identifier is a unique string used to identify a database connection.

The following are some common causes of ORA-12154 errors:

• Input error: You may have made a spelling or grammatical error when entering the connection identifier .
• Connection identifier does not exist: The specified connection identifier does not exist in the database you are trying to connect to.
• Insufficient permissions: You do not have permission to connect to the database or do not have permission to access the connection identifier.
• Database Unavailable: The database you are trying to connect to may be temporarily unavailable or closed.
• Network problems:There may be problems with the network connection to the database, such as a firewall blocking the connection.

Workaround:

To resolve the ORA-12154 error, try the following steps:

• Check the connection Identifier:Check the connection identifier carefully to make sure there are no typos or syntax errors.
• Confirm the connection identifier: Confirm with the database administrator that the connection identifier exists and is valid in the database.
• Check permissions: Make sure you have permission to connect to the database and access the connection identifier.
• Check database status: Confirm that the database is running and accessible.
• Check network connection: Test your network connection to troubleshoot firewall or other network issues.

If you have tried the above steps and the problem persists, please contact your database administrator for further assistance.

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