ORA-12514:TNS:listener does not currently know of service requested in connect

ORA-12514错误是Oracle数据库的一个常见错误，它表示监听程序无法找到连接请求中所请求的服务。这通常是由以下原因之一引起的：

1. 服务名错误：在连接字符串中指定的服务名可能与实际的服务名不匹配。请确保使用正确的服务名。

2. 服务未启动：如果请求的服务没有启动，监听程序将无法找到它。请确认服务已经启动并正在运行。

3. 监听程序配置错误：如果监听程序的配置不正确，它可能无法识别请求的服务。请检查监听程序的配置文件，确保它包含正确的服务名和端口号。

如果您遇到ORA-12514错误，请尝试检查以上原因并进行相应的修复。

相关问题

ORA-12514: TNS:listener does not currently know of service requested in connect

ORA-12514错误是Oracle数据库中的一个常见错误，它表示监听程序无法识别连接请求中所请求的服务。这通常是由以下几种情况引起的：

1. 服务名称错误：请确保在连接字符串中指定了正确的服务名称。服务名称是在数据库中配置的标识符，用于唯一标识一个数据库实例。

2. 监听程序未启动：请确保Oracle数据库的监听程序已经启动。监听程序负责接收客户端的连接请求，并将其转发给相应的数据库实例。

3. 监听程序配置错误：如果监听程序已经启动，但仍然无法识别请求的服务，可能是由于监听程序的配置错误导致的。您可以检查监听程序的配置文件（通常是listener.ora文件）以确保其中包含了正确的服务名称。

4. 服务未注册：如果数据库实例没有向监听程序注册所提供的服务，那么监听程序将无法识别该服务。您可以通过在数据库实例上执行相应的注册命令来解决此问题。

ORA-12514:TNS:listener does not currently know of service requested in connect descriptor Ora-12514

ORA-12514 is an error that occurs when the Oracle listener is not able to find the requested service in the connect descriptor provided. This error typically indicates that the service name or SID specified in the connection string is incorrect or not known by the listener.

To resolve this issue, you can try the following steps:

1. Verify the service name or SID: Double-check the service name or SID specified in the connect descriptor. Make sure it matches the service name or SID defined in the Oracle database.

2. Check listener status: Ensure that the Oracle listener is running and listening for incoming connections. You can use the following command to check the listener status:

   lsnrctl status

If the listener is not running, start it using the following command:

   lsnrctl start

3. Register the service: If the service name or SID is correct, but still not known by the listener, you can try registering the service manually with the following command:

   lsnrctl services

This command will reload the listener configuration and make it aware of any new services.

4. Check network connectivity: Ensure that there is no network issue between the client and the Oracle server. Check if you can ping the server from the client machine and vice versa.

If none of these steps resolve the ORA-12514 error, it might be helpful to provide more information about your specific setup, such as the version of Oracle Database, operating system, and how you are connecting to the database.