How to start oracle database server

To start the Oracle database server, please perform the following steps in sequence: Start the listener (lsnrctl start) Start the instance (sqlplus /nolog STARTUP) Connect to the database (sqlplus username/password) Verify the connection (SELECT sysdate FROM dual; )

How to start the Oracle database server

The process of starting the Oracle database server includes the following steps:

1. Start the listener

The listener is a process responsible for listening to client connection requests. To start the listener, use the following command:

<code>lsnrctl start</code>

2. Start the instance

An instance is an instance of the database server. To start the instance, use the following command:

<code>sqlplus /nolog
STARTUP</code>

3. Connect to the database

Now you can connect to the database using a client tool such as SQL*Plus . To connect, use the following command:

<code>sqlplus username/password</code>

4. Verify the connection

Once connected, you can enter the following command to verify the connection:

<code>SELECT sysdate FROM dual;</code>

If the current date and time is returned, you have successfully connected to the database.

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