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Database Administrator's Guide, 11g Release 2 (11.2)

Database Administrator's Guide - Contents

Contentsin Database Links Global Name as a Loopback Database Link Names for Database Links Types of … Schema Objects Schema Object Name Resolution Database Link Restrictions Distributed Database … Transactions Two-Phase Commit Mechanism Database Link

Database SQL Language Reference, 11g Release 2 (11.2)

Database SQL Language Reference - Contents

ContentsALTER DATABASE ALTER DATABASE LINK ALTER DIMENSION ALTER DISKGROUP ALTER FLASHBACK ARCHIVE ALTER … CREATE CONTEXT CREATE CONTROLFILE CREATE DATABASE CREATE DATABASE LINK CREATE DIMENSION CREATE DIRECTORY … DROP CLUSTER DROP CONTEXT DROP DATABASE DROP DATABASE

Database Administrator's Guide, 11g Release 2 (11.2)

Distributed Database Concepts

Database Link Restrictionsdatabase. Jane cannot issue SET ROLE to obtain a nondefault role. Use a current user link without … You 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.

Database Administrator's Guide, 11g Release 2 (11.2)

Distributed Database Concepts

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

Database SQL Language Reference, 11g Release 2 (11.2)

ALTER DATABASE LINK

ALTER DATABASE LINKPurpose Use the ALTER DATABASE LINK statement to modify a fixed-user database link when the … the connection or authentication user associated with the database link. To change user, you must re … -create the database link. You cannot use this statement

Database SQL Language Reference, 11g Release 2 (11.2)

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 SQL Language Reference, 11g Release 2 (11.2)

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 … V$DBLINK dynamic performance view ALTER DATABASE

Database Administrator's Guide, 11g Release 2 (11.2)

Managing a Distributed Database

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 2 (11.2)

Managing a Distributed Database

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.example.com

Database Administrator's Guide, 11g Release 2 (11.2)

Managing a Distributed Database

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 2 (11.2)

Managing a Distributed Database

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.example.com CONNECT TO scott … database can use the sales.division3.example.com database

Database Administrator's Guide, 11g Release 2 (11.2)

Managing a Distributed Database

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 2 (11.2)

Managing a Distributed Database

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 … user. The consequences of this database link are as

Database Data Warehousing Guide, 11g Release 2 (11.2)

Change Data Capture

Step 7   Staging Database Publisher: Create Database LinkThe staging database publisher creates a link from the staging database to the source database … . Again, because the GLOBAL_NAMES initialization parameter is set to TRUE, the database link name will be … source_db: CREATE DATABASE LINK source_db CONNECT

Database Data Warehousing Guide, 11g Release 2 (11.2)

Change Data Capture

Step 6   Source Database Publisher: Create Database LinkThe source database publisher creates a link from the source database to the staging database … . Because the GLOBAL_NAMES initialization parameter is set to TRUE, the database link name will be same as … : CREATE DATABASE LINK staging_db CONNECT TO

SQL Developer User's Guide, 11g Release 2 (11.2)

Dialog Boxes for Creating/Editing Objects

Create/Edit Database LinkThe following information applies to a database link, which is a database object in one database … Private). Public: If this option is checked, the database link is public (available to all users). If … this option is not checked, the database link is

Application Express SQL Workshop and Utilities Guide, 11g Release 2 (11.2)

Managing Database Objects with Object Browser

Creating a Database LinkTo create a database link: On the Workspace home page, click SQL Workshop and then Object Browser … . Object Browser appears. Click Create. From the list of object types, select Database Link. Specify … the following information and click Next. Database Link Name Connect To Schema Password

Application Express SQL Workshop and Utilities Guide, 11g Release 2 (11.2)

Managing Database Objects with Object Browser

Browsing a Database LinkTo browse a database link: On the Workspace home page, click SQL Workshop and then Object Browser … , select a database link. The Object Details view appears. Summary of Available Views Click the tabs … at the top of the page to view different reports about the database link. Table 1-11

Application Express SQL Workshop and Utilities Guide, 11g Release 2 (11.2)

Managing Database Objects with Object Browser

Dropping a Database LinkTo drop a database link in Object Browser: On the Workspace home page, click SQL Workshop and then … Selection pane, select a database link. The Object Details View appears. Click Drop. … Object Browser. Object Browser appears. From the Object list, select Database Links. From the Object

Database Upgrade Guide, 11g Release 2 (11.2)

Moving Data Using Oracle Data Pump

Importing a Full Database Using a Network Linkcan use the Data Pump Import utility with a database link to perform a full database import from a … these steps to use a network link with impdp: Ensure that the exporting user at the source database has … the EXP_FULL_DATABASE role. This user must be specified when you create the database

Database Concepts, 11g Release 2 (11.2)

Glossary

database linkIn a schema object, a schema object in one database that enables users to access objects on a different database.

Database Administrator's Guide, 11g Release 2 (11.2)

Managing a Distributed Database

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 2 (11.2)

Managing a Distributed Database

Specifying Link TypesWhen you create a database link, you must decide who will have access to it. The following sections … private database link, specify the following (where link_name is the global database name or an arbitrary … link name): CREATE DATABASE LINK link_name...;

Database Administrator's Guide, 11g Release 2 (11.2)

Distributed Database Concepts

Type of Link DescriptionFigure 31-3 Database Link Description of \"Figure 31-3 Database Link\" Database links are either … their account on the local database. Fixed user link Users connect using the user name and password … referenced in the link. For example, if Jane uses

Streams Advanced Queuing User's Guide, 11g Release 2 (11.2)

JMS and AQ XML Servlet Error Messages

JMS-430 Database Link must be specifiedCause: DB Link is Action: Specify a non- Register Option

Database Administrator's Guide, 11g Release 2 (11.2)

Distributed Database Concepts

Database Linksdatabase link. A database link is a connection between two physical database servers that allows a client … Types of Database Links Users of Database Links Creation of Database Links: Examples Schema Objects and Database Links Database

Database Administrator's Guide, 11g Release 2 (11.2)

Managing a Distributed Database

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 2 (11.2)

Distributed Database Concepts

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

Streams Concepts and Administration, 11g Release 2 (11.2)

Monitoring Oracle Streams Queues and Propagations

Displaying the Queues and Database Link for Each Propagationpropagation name The source queue name The database link used by the propagation The destination queue … SOURCE_QUEUE_NAME HEADING 'Source|Queue|Name' FORMAT A17 COLUMN DESTINATION_DBLINK HEADING 'Database|Link' FORMAT … database. The query in this section displays the following information about each

Streams Concepts and Administration, 11g Release 2 (11.2)

Managing Oracle Streams Implicit Capture

Specifying Whether Downstream Capture Uses a Database LinkYou specify whether an existing downstream capture process uses a database link to the source … database link, or you set the use_database_link parameter to FALSE to specify that the downstream … capture process does not use a database link. If you want a capture process that is not

Streams Extended Examples, 11g Release 2 (11.2)

Simple Single-Source Replication Example

Step 3   Create the Database Link at str1.example.comCreate the database link from the database where changes are captured to the database where changes … : ' HIDE CREATE DATABASE LINK str2.example.com CONNECT TO strmadmin IDENTIFIED BY &password USING 'str2.example.com'; /* … are propagated. In this example, the database

Streams Extended Examples, 11g Release 2 (11.2)

Single-Source Heterogeneous Replication Example

Step 3   Create the Database Link at dbs1.example.comCreate the database link from the database where changes are captured to the database where changes … : ' HIDE CREATE DATABASE LINK dbs2.example.com CONNECT TO strmadmin IDENTIFIED BY &password USING 'dbs2.example.com'; /* … are propagated. In this example, the database

Database Administrator's Guide, 11g Release 2 (11.2)

Managing a Distributed Database

Managing Database LinksFigure 32-1 A Shared Database Link to Dedicated Server Processes Description of \"Figure 32-1 A … Shared Database Link to Dedicated Server Processes\" Creating Shared Links to Shared Servers The … as shared servers. Figure 32-2 Shared Database Link to Shared Server Description of \"Figure

Database Administrator's Guide, 11g Release 2 (11.2)

Distributed Database Concepts

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 2 (11.2)

Distributed Database Concepts

Why Use Database Links?, a local user can access a link to a remote database without having to be a user on the remote … 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 2 (11.2)

Managing a Distributed Database

Using Shared Database LinksEvery application that references a remote server using a standard database link establishes a … connection between the local database and the remote database. Many users running applications … simultaneously can cause a high number of connections between the local and remote databases. Shared database

Database SQL Language Reference, 11g Release 2 (11.2)

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 connection_qualifier components. The partial

Database Administrator's Guide, 11g Release 2 (11.2)

Distributed Database Concepts

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 2 (11.2)

Distributed Database Concepts

Auditing Database Linksand accesses a remote database through a database link, the local actions are audited in the local … actions of the username--in this case, scott on the hq database--embedded in the link if the desired … audit use of a database link, although access to remote objects

Database SQL Language Reference, 11g Release 2 (11.2)

Database Object Names and Qualifiers

Database Object Naming Rules, database names, global database names, and database link names are always case insensitive and are … ASCII characters in database names, global database names, and database link names, because ASCII … Every database object has a name.