How do I grant a database link in Oracle?
To create a private database link, you must have the CREATE DATABASE LINK system privilege. To create a public database link, you must have the CREATE PUBLIC DATABASE LINK system privilege. Also, you must have the CREATE SESSION system privilege on the remote Oracle database.
How do I find the DB link 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 a DB 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. To access the link, you must be connected to the local database that contains the data dictionary entry.
How do you check DB link is active or not?
If application schema’s password is not known to DBA. We can verify public database link using select * from dual@public_db_link; How private db links can be verified by a DBA if application schema’s password is not known.
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.
Can a remote database be an Oracle Database?
The remote database can be an Oracle Database or any ODBC compliant database such as SQL Server or MySQL. A database link allows a user or program to access database objects such as tables and views from another database. Once you create a database link, you can access the tables or views from the remote database using the following pattern:
How to access a remote object over a database link?
When accessing a remote object over a database link, the local database is acting as an Oracle client. There are a variety of syntax variations in the documentation, but the ones you will most commonly use are as follows. — Remote Username: scott — Remote Password: tiger — Private database link to a user in a remote database.
Why do you need a database link in Oracle?
A database link is a connection from the Oracle database to another remote database. The remote database can be an Oracle Database or any ODBC compliant database such as SQL Server or MySQL. Why do you need a database link A database link allows a user or program to access database objects such as tables and views from another database.
Do you have to create dB link in local database?
In local database, it has to create DB LINK through CREATE DATABASE LINK. What about remote database side, what does it have to do? On fixed user link, local database need to know ID and password set. Is the ID is a usual account with which someone can access to the remote database without DB LINK or the ID is only for DB LINK?