Home Database Oracle How to use oracle database listening configuration file client

How to use oracle database listening configuration file client

Apr 18, 2024 pm 10:30 PM
oracle linux

To connect to the database server using the Oracle database listener client configuration file (tnsnames.ora): Find and edit the tnsnames.ora configuration file. Add a new entry, specifying the alias, connection protocol, host IP/name, port number, and service name. Optional: Configure connection properties such as user, password, and timeout. save Changes. Use aliases in client applications to connect to the database server.

How to use oracle database listening configuration file client

Using the Oracle database listener client configuration file

Oracle database listener client configuration file (tnsnames. ora) allows client applications to connect to the database server. Here's how to use this configuration file:

1. Find the configuration file

tnsnames.ora The file is usually located in the following directory:

  • Windows: C:\Program Files\Oracle\NETWORK\ADMIN
  • Unix/Linux:/etc/oracle/net/network/admin

2. Edit the configuration file

Use a text editor to open the tnsnames.ora file. Typically, you need to add new entries to configure the connection.

3. Add new entries

Add new entries in the following format:

<code><Alias Name> =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = <Protocol>) (HOST = <Host IP/Name>) (PORT = <Port Number>))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = <Service Name>)
    )
  )</code>
Copy after login

Among them:

  • <Alias ​​Name>: The alias you want to use for the connection.
  • <Protocol>: Connection protocol (TCP, IPC, etc.).
  • <Host IP/Name>: The IP address or host name of the database server.
  • <Port Number>: The port number of the database listener.
  • <Service Name>: The name of the database service to be connected.

4. Configure other properties (optional)

In addition to basic information, you can also configure other connection properties, such as:

  • USER: The username to use when connecting.
  • PASSWORD: The password to use when connecting.
  • CONNECT_TIMEOUT: Connection timeout in seconds.

5. Save changes

Save the tnsnames.ora file.

6. Using aliases

In the client application, use aliases to connect to the database server. For example:

<code>SELECT * FROM table_name@<Alias Name></code>
Copy after login

Note:

  • Make sure the database listener is running.
  • You need to have the appropriate permissions to connect to the database server.
  • Different Oracle versions may require slightly different syntax.

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