How to check Oracle installation

Title: Methods to check Oracle installation and specific code examples

After installing the Oracle database, in order to ensure that the installation is completed and the database is running normally, we need to Do some checks. The following will introduce some commonly used inspection methods and provide specific code examples.

1. Check the Oracle service status:
   You can check the service status of the Oracle database through the command line to ensure that the service has been started. The following is an example of a command to check the status of the Oracle service under Windows systems:

   net start OracleServiceORCL

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2. Check the listener status:
   Oracle database requires a listener to accept the client's connection request. You can check the listener status through the following command:

   lsnrctl status

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3. Check the Oracle database instance status:
   Use a tool such as SQL*Plus or SQL Developer to connect to the Oracle database instance and enter the following SQL Statement to check the status of the database instance:

   select instance_name, status from v$instance;

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4. Check the status of the table space and data files:
   Use the following SQL statement to check the status of the table space and data files:

   select tablespace_name, status from dba_tablespaces;
   select file_name, status from dba_data_files;

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5. Check the status of the listening port:
   You can use tools such as telnet or nc to check the status of the Oracle database listening port. The following is an example of using telnet to check the port status:

   telnet localhost 1521

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Through the above checking method, we can ensure that the Oracle database is installed and running normally. If any abnormalities are found during the inspection process, they can be investigated and processed according to specific error prompts to ensure the stable and safe operation of the database system.

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