You are using an outdated browser. Please upgrade to the latest version for the best experience.
How do I narrow my search results?

After you submit your search query:

  1. On the Refine Search results page, select one or more categories of products or services from the left sidebar.
  2. Then for a category with search results, click Select to choose your product and release filters, and then click OK.

For search queries that contain multiple words, surround the query with quotes, and then resubmit your query. Example: "database cloud service"

How do I find the documentation for my product or service?

From the home page, click the technology categories for your products or services. If you do not know which category to pick, try the following features:

  • Click the Find a product tab and search for your product or service.
  • Click Browse All Products & Services at the bottom of the home page to view an alphabetical listing of products and services.
  • Apple Safari: Version 6
  • Google Chrome: Version 29 and later
  • Mozilla Firefox: Version 24 and later
  • Microsoft Internet Explorer: Version 9 and later
Results for database link


1 to 40 of 62480 results. Previous page Prev  Next next page
Results per page:  20 |  40  | 60


Database Administrator's Guide, 11g Release 1 (11.1)

Database Administrator's Guide - Contents

ContentsResolution Database Link Restrictions Distributed Database Administration Site Autonomy Distributed … Mechanism Database Link Name Resolution Name Resolution When the Global Database Name Is Complete Name … Specifying Link Types Creating Private Database

Database SQL Language Reference, 11g Release 1 (11.1)

Database SQL Language Reference - Contents

ContentsCONTEXT CREATE CONTROLFILE CREATE DATABASE CREATE DATABASE LINK CREATE DIMENSION CREATE DIRECTORY … CONTEXT DROP DATABASE DROP DATABASE LINK DROP DIMENSION DROP DIRECTORY DROP DISKGROUP DROP FLASHBACK … Conventions What's New in the SQL Language Reference? Oracle Database

Database SQL Language Reference, 11g Release 1 (11.1)

DROP DATABASE LINK

DROP DATABASE LINKPurpose Use the DROP DATABASE LINK statement to remove a database link from the database. See Also … : CREATE DATABASE LINK for information on creating database links Prerequisites A private databaselink must be in

Database Administrator's Guide, 11g Release 1 (11.1)

Transaction Processing in a Distributed System

Database Link Name ResolutionA global object name is an object specified using a database link. The essential components of a … database link with a name that matches the database name specified in the global object name. For … searches for a database link called orders.us.acme.com. The database

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Database Link RestrictionsYou cannot perform the following operations using database links: Grant privileges on remote … referential integrity Grant roles to users in a remote database Obtain nondefault roles on a remote … database. For example, if jane connects to the local database and executes a stored procedure that … uses a fixed

Database SQL Language Reference, 11g Release 1 (11.1)

CREATE DATABASE LINK

CREATE DATABASE LINKPurpose Use the CREATE DATABASE LINK statement to create a database link. A database link is a … Heterogeneous Services. After you have created a database link, you can use it in SQL statements to … DROP DATABASE LINK

Database Administrator's Guide, 11g Release 1 (11.1)

Manually Committing an In-Doubt Transaction: Example

Obtaining Database Role and Database Link Informationlocal account for the database link connection that corresponds to the in-doubt transaction. out Your … node is a client of other servers. Lists the name of the database link that connects to the remote … node. Lists the owner of the database link for the in-doubt transaction. In this

Database Administrator's Guide, 11g Release 1 (11.1)

Managing Database Links

Procedure for Dropping a Public Database LinkConnect to the local database as a user with the DROP PUBLIC DATABASE LINK privilege. For example … selected. Drop the desired link using the DROP PUBLIC DATABASE LINK statement. For example, enter: DROP PUBLIC DATABASE LINK sales.us.oracle.com;

Database Administrator's Guide, 11g Release 1 (11.1)

Managing Database Links

Procedure for Dropping a Private Database Link… Drop the desired link using the DROP DATABASE LINK statement. For example, enter: DROP DATABASE LINK sales.us.oracle.com; … Connect to the local database using SQL*Plus. For example, enter: CONNECT scott@local_db Query

Database Administrator's Guide, 11g Release 1 (11.1)

Managing a Distributed Database: Examples

Example 2: Creating a Public Fixed User Shared Database LinkThe following example connects to the local database as dana and creates a public link to the sales … database (using its net service name sldb ). The link allows a connection to the remote database as … scott and authenticates this user as scott: CONNECT dana@local CREATE SHARED PUBLIC DATABASE

Database Administrator's Guide, 11g Release 1 (11.1)

Managing a Distributed Database: Examples

Example 5: Creating a Public Current User Database Linklink to the sales database (using its net service name sldb ). The following statement creates a public … current user database link: CONNECT bart@local CREATE PUBLIC DATABASE LINK sales.division3.acme.com … user. The consequences of this database link

Database Administrator's Guide, 11g Release 1 (11.1)

Managing a Distributed Database: Examples

Example 4: Creating a Public Connected User Shared Database LinkThe following example connects to the local database as neil and creates a shared, public link to … /password of crazy/horse. The following statement creates a public, connected user, shared database link … : CONNECT neil@local CREATE SHARED PUBLIC DATABASE LINK sales.division3.acme.com

Database Administrator's Guide, 11g Release 1 (11.1)

Managing Database Links

Limiting the Number of Active Database Link Connectionsno distributed transactions are allowed. See Also: Oracle Database Reference for more information about the OPEN_LINKS initialization parameter

Database Administrator's Guide, 11g Release 1 (11.1)

Managing a Distributed Database: Examples

Example 3: Creating a Public Connected User Database LinkThe following example connects to the local database as larry and creates a public link to the … database with the net service name sldb: CONNECT larry@local CREATE PUBLIC DATABASE LINK redwood USING … 'sldb'; Any user connected to the local database can use the redwood database

Database Administrator's Guide, 11g Release 1 (11.1)

Managing a Distributed Database: Examples

Example 1: Creating a Public Fixed User Database Linkdatabase link to database sales for scott. The database is accessed through its net service name sldb … : CONNECT jane@local CREATE PUBLIC DATABASE LINK sales.division3.acme.com CONNECT TO scott IDENTIFIED … use the sales.division3.acme.com database link

Database Administrator's Guide, 11g Release 1 (11.1)

Creating Database Links

Specifying Link UsersA database link defines a communication path from one database to another. When an application uses … a database link to access a remote database, Oracle Database establishes a database session in the … database link,

Database Administrator's Guide, 11g Release 1 (11.1)

Creating Database Links

Specifying Link TypesWhen you create a database link, you must decide who will have access to it. The following sections … describe how to create the three basic types of links: Creating Private Database Links Creating Public Database Links Creating Global Database Links

Database Concepts, 11g Release 1 (11.1)

Glossary

database linkA named schema object that describes a path from one database to another. Database links are … implicitly used when a reference is made to a global object name in a distributed database.

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Database LinksThe central concept in distributed database systems is a database link. A database link is a … Database Links Creation of Database Links: Examples Schema Objects and Database Links Database Link Restrictions … connection

Database Administrator's Guide, 11g Release 1 (11.1)

Viewing Information About Database Links

Determining Which Link Connections Are OpenYou may find it useful to determine which database link connections are currently open in your … . The following views show the database link connections that are currently open in your current … , with one exception: Column Which Views? Description DB_LINK All The name of the database link

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Global Database Names in Database LinksTo understand how a database link works, you must first understand what a global database name is … . Each database in a distributed database is uniquely identified by its global database name. The … database forms a global database name by prefixing

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Names for Database LinksTypically, a database link has the same name as the global database name of the remote database … the database link is also called sales.us.oracle.com. When you set the initialization parameter … GLOBAL_NAMES to TRUE, the database ensures that the name of the database

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Types of Database LinksOracle Database lets you create private, public, and global database links. These basic link types … USER_DB_LINKS Creates link in a specific schema of the local database. Only the owner of a private database link … or PL/SQL subprograms in the schema can use this link

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Creation of Database Links: ExamplesCreate database links using the CREATE DATABASE LINK statement. The table gives examples of SQL … database: SQL Statement Connects To Database Connects As Link Type CREATE DATABASE LINK … connected user CREATE DATABASE LINK

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Connected User Database Linkslink is that a user referencing the link connects to the remote database as the same user, and … jobs. The ability to use a connected user database link depends on several factors, chief among them … , then the ability to use a connected user link also depends on whether the remote database

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Schema Objects and Database LinksAfter you have created a database link, you can execute SQL statements that access objects on the … remote database. For example, to access remote object emp using database link foo, you can issue … : SELECT * FROM emp@foo; You must also be authorized in the remote database to access

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

What Are Database Links?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

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Synonyms for Schema ObjectsOracle Database lets you create synonyms so that you can hide the database link name from the user … . A synonym allows access to a table on a remote database using the same syntax that you would use to … access a table on a local database. For example, assume you issue the following query against a

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Why Use Database Links?, a local user can access a link to a remote database without having to be a user on the remote … of database link users \"Viewing Information About Database Links\" for an explanation of how to hide passwords from non-administrative users … The great advantage of database links is that

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Fixed User Database LinksA benefit of a fixed user link is that it connects a user in a primary database to a remote … can create a public database link in joe 's schema that specifies the fixed user scott with … password tiger. If jane uses the fixed user link in a query, then jane is the user on the local database

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

What Are Shared Database Links?A shared database link is a link between a local server process and the remote database. The linkdatabase is connected to a remote database through a database link, either database can run in dedicated … Shared server

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Current User Database Linksto retrieve data from the hq database. The procedure uses a current user database link, which … current user database link is not accessed from within a stored object, then the current user is … procedure, view, or trigger that accesses a database link, the current user

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Naming of Schema Objects Using Database Links, index, view, synonym, procedure, package, or a database link. global_database_name is the name that … FALSE, in which case any name is acceptable. For example, using a database link to database … .acme.com. For example, you can call the link foo. Then, you can access the remote database

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Users of Database LinksWhen creating the link, you determine which user should connect to the remote database to access … database links: User Type Description Sample Link Creation Syntax Connected user A local user accessing a … database link in which no fixed username and password have been specified. If

Database Administrator's Guide, 11g Release 1 (11.1)

Database Links

Schema Object Name Resolutionissue the following statements using database link hq.acme.com to access objects in the scott and jane … database forms object names hierarchically. For example, the database guarantees that each schema within a … database has a unique name, and that within a schema each object has a unique name. As

Database SQL Language Reference, 11g Release 1 (11.1)

Syntax for Schema Objects and Parts in SQL Statements

References to Database Linksa SQL statement that contains a database link, you can specify the database link name in one of … these forms: The complete database link name as stored in the data dictionary, including the database … , domain, and optional connect_descriptor components. The partial

Database Administrator's Guide, 11g Release 1 (11.1)

Using Shared Database Links

Creating Shared Database LinksTo create a shared database link, use the keyword SHARE D in the CREATE DATABASE LINK statement … : CREATE SHARED DATABASE LINK dblink_name [CONNECT TO username IDENTIFIED BY password]|[CONNECT TO … server processes from clients that masquerade as a database link

Database Administrator's Guide, 11g Release 1 (11.1)

Managing Database Links

Managing Database LinksThis section contains the following topics: Closing Database Links Dropping Database Links Limiting the Number of Active Database Link Connections

Database SQL Language Reference, 11g Release 1 (11.1)

Syntax for Schema Objects and Parts in SQL Statements

Creating Database LinksYou create a database link with the statement CREATE DATABASE LINK. The statement lets you specify … this information about the database link: The name of the database link The database connect string … stores this information in the

Database Administrator's Guide, 11g Release 1 (11.1)

Distributed Database Administration

Authentication Through Database Links: CREATE PUBLIC DATABASE LINK foo USING 'sales'; You create authenticated links by specifying the … CONNECT TO clause, AUTHENTICATED BY clause, or both clauses together in the database link creation … statement. For example, you can issue: CREATE DATABASE LINK sales CONNECT TO scott