How do I find database links in Oracle?

How do I find database links in Oracle?

Any user can query USER_DB_LINKS to determine which database links are available to that user. Only those with additional privileges can use the ALL_DB_LINKS or DBA_DB_LINKS view.

What is database link in Oracle 11g?

A database link is a schema object in one database that enables you to access objects on another database. The other database need not be an Oracle Database system. After you have created a database link, you can use it to refer to tables and views on the other database.

How do you create a database link?

Oracle CREATE DATABASE LINK statement

1. First, specify the name of the database link after the CREATE DATABASE LINK keywords.
2. Second, provide user and password of the remote database after the CONNECT TO and IDENTIFIED BY keywords.
3. Finally, specify the service name of the remote database.

What is a public database link?

A public database link is one that can be used by any user. A private database link can be used only by the database link’s owner. Specification of the PUBLIC option creates a public database link. If omitted, a private database link is created.

Are database links secure?

Database links, like any tool, have their uses and misuses. There is nothing inherently insecure about using a database link. But there are certainly plenty of ways to architect a system using database links that is insecure. A database link lets you connect one database to another.

What is private DB Link?

Database links can be public or private. A public database link is one that can be used by any user. A private database link can be used only by the database link’s owner.

How do I drop a DB Link?

Use the DROP DATABASE LINK statement to remove a database link from the database. A private database link must be in your own schema. To drop a PUBLIC database link, you must have the DROP PUBLIC DATABASE LINK system privilege. You must specify PUBLIC to drop a PUBLIC database link.

How do I download and install Oracle Database 11g Release 2 client?

Under “Oracle Database 11g Release 2 Client (11.2.0.1.0) for Microsoft Windows (x64)”, click to download the client. This file requires 609 MB of free space on your hard drive. You may be prompted to enter a valid OTN username and password. Once you have done so, you will see the “File Download” dialog box.

How do I download the client Oracle Database client?

To download the client Oracle Database client directly from Oracle’s website: Go to Oracle Database 11g Release 2 for Microsoft Windows (x64) . Click OTN License Agreement, read the license agreement, and then close the window. Select Accept License Agreement.

What is a database link in Oracle?

A database link is a pointer that defines a one-way communication path from an Oracle Database server to another database server. The link pointer is actually defined as an entry in a data dictionary table.

How to connect 10g and 11g linked databases?

Create db_links (DB10, DB11) in your 11g linking database to both the 10g and 11g linked databases. Run these queries in your 11g linking database: