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18 Μαρ 2010 · This will show you any database links set up on the database: select * from dba_db_links; You would then have to search for any queries or objects using the db link by doing a text search of them for the link syntax <tablename>@<dblink name>
A good way around this is to create a view in SCHEMA_B that exposes the table you want to access through the database link. This will also give you good control over who is allowed to select from the database link, as you can control the access to the view. Do like this:
14 Νοε 2011 · These views are helpful for working with DB links in Oracle: DBA_DB_LINKS - All DB links defined in the database; ALL_DB_LINKS - All DB links the current user has access to; USER_DB_LINKS - All DB links owned by current user; See more in Oracle documentation
Most commonly, a database link is used to connect to a user in a remote database, where the USING clause points to an entry in the database servers "tnsnames.ora" file. For local links, the special entry of 'local' is used. Basic Usage. Once a database link is created, for example the "scott_remote" link, remote objects can be referenced as ...
9 Μαρ 2006 · If you want to know whether any database links exist in data dictionary views, and where the database links connect to, you can get the information from DBA_DB_LINKS view. Just launch your SQL*Plus or Toad, or whatever convenient to you and query the dba_db_links table.
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.
27 Δεκ 2023 · A database link is a schema object in one database that enables you to access objects on another database. The remote database may be on the same system or on a different system. Once the link is set, you can access the remote database by referencing the database link in SQL statements.
