Accessing Data with Database Links

Access data remotely by creating a database link.

• About Database Links
  
• Creating a Database Link
  
• Viewing an Existing Database Link
  

See Also:

• "Managing Database Objects with Object Browser" in Oracle Application Express SQL Workshop Guide

• "Database Links" in Oracle Database Administrator's Guide

About Database Links

Because Oracle Application Express runs in the Oracle database, you have access to all distributed Oracle database capabilities. Typically, you perform distributed database operations using database links.

A database link is a schema object in one database that enables you to access objects on another database. Once you have created the database link you can access the remote objects by appending @dblink to the table or view name where dblink is the Database Link Name you specify in the Create Database Object Wizard.

Note:

By default, the CREATE DATABASE LINK system privilege is not granted to a provisioned workspace or database user. To use this feature, a DBA or administrator must grant this specific privilege to the database user in the user's workspace. See "Creating Database Links" in Oracle Database Administrator's Guide.

Creating a Database Link

To create a database link:

1. On the Workspace home page, click SQL Workshop and then Object Browser.

   Object Browser home page appears.

2. Click Create.
3. Select Database Link and click Next.
4. Follow the on-screen instructions.

   Note that Database Link names must conform to Oracle naming conventions and cannot contain spaces, or start with a number or underscore.

Viewing an Existing Database Link

To view an existing a database link:

1. On the Workspace home page, click SQL Workshop and then Object Browser.

   Object Browser appears.

2. Select the object type Database Links at the top of the page.