How to create & use database links

i have 2 databases (oracle 8.1.6) and (oracle8.1.5)
i want to call a function of one d/b from another
i think this is possible via databse links.
how do i go about creating and using them
can someone guide me to a site or post an example .
what all changes do i need to make in my configuration settings of the databases
null

Yes, you can do this with database links.
Please see: http://otn.oracle.com/docs/products/oracle8i/doc_library/817_doc/server.817/a76960/ds_admin.htm#22393
null

Similar Messages

How to create a database link on an ms acces data source

Hello every body
Is it possible to create a database link on an MS access data source under
oracle 10 g and Apex ?
If yes how to do it ?
Thanks in advace

I don't know what Apex is!!! But try to follow these instructions.
It works for Oracle 9i.
As far as I know, you are supposed to have installed other than ORACLE Client to complete these instructions.
1. Control Panel / Administrative Tools / Data Sources (ODBC)
Folder: System DSN /
click add
Choose : Microsoft Access Driver
Data Source Name : my_test
Description : any_description_you_want
click Database/Select... : full pathname for <your_file.mdb>
click OK
Click OK
2. Goto OH\hs\admin:
2.1) Create a copy of "inithsodbc.ora" file giving it this name:
initmy_test.ora
2.2) Edit "initmy_test.ora" and change as below.
# HS init parameters
HS_FDS_CONNECT_INFO = my_test
HS_FDS_TRACE_LEVEL = OFF
3. Add this entry to listener ( Don't forget to stop/start the listener )
(SID_DESC =
(SID_NAME = my_teste)
(ORACLE_HOME = <Path to OH> ) ### Ex: D:\ORANT901
(PROGRAM = hsolesql)
4. Now you need to add entries to point to the HS in the tnsnames.ora :
access =
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=<your_host>)(PORT=1521))
(CONNECT_DATA=(SID=my_test))
(HS=my_test)
5. Now you need to go into the database and create the database link:
CREATE PUBLIC DATABASE LINK "ACCESS_DB" USING 'access';
6. select * from your_table@ACCESS_DB;
HTH
RK
Message was edited by:
RKravcenko

How to create a database link between an 8i (apps) database and APEX

Want to link my Oracle APPS databse on 8i with Oracle XE and APEX. Any idea how to achieve this ?

I don't know what Apex is!!! But try to follow these instructions.
It works for Oracle 9i.
As far as I know, you are supposed to have installed other than ORACLE Client to complete these instructions.
1. Control Panel / Administrative Tools / Data Sources (ODBC)
Folder: System DSN /
click add
Choose : Microsoft Access Driver
Data Source Name : my_test
Description : any_description_you_want
click Database/Select... : full pathname for <your_file.mdb>
click OK
Click OK
2. Goto OH\hs\admin:
2.1) Create a copy of "inithsodbc.ora" file giving it this name:
initmy_test.ora
2.2) Edit "initmy_test.ora" and change as below.
# HS init parameters
HS_FDS_CONNECT_INFO = my_test
HS_FDS_TRACE_LEVEL = OFF
3. Add this entry to listener ( Don't forget to stop/start the listener )
(SID_DESC =
(SID_NAME = my_teste)
(ORACLE_HOME = <Path to OH> ) ### Ex: D:\ORANT901
(PROGRAM = hsolesql)
4. Now you need to add entries to point to the HS in the tnsnames.ora :
access =
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=<your_host>)(PORT=1521))
(CONNECT_DATA=(SID=my_test))
(HS=my_test)
5. Now you need to go into the database and create the database link:
CREATE PUBLIC DATABASE LINK "ACCESS_DB" USING 'access';
6. select * from your_table@ACCESS_DB;
HTH
RK
Message was edited by:
RKravcenko

How to Create Public database link in oracle 9i?

Friends,
OS: RHEL AS 3
DB: 9iR2
database name 1 = nubul
database name 2 = test
in the 'nubul' database server using system user.
i created a database link to connect the 'test' database
sql> create public database link test using 'test';
database link created.
then i logged in as normal user....
sql> select count(*) from employee@test
Error at line 1:
ORA-12154: TNS: could not resolve service name
where i am making mistake?
i gave the linkname as my remote database name.
am i have to make any entry in the tnsnames.ora?
thanks & regards

You have to remember that when you access a dblink, the database where the link is defined is acting as a client to the database to which the link points ... exactly the same as if you you were using sqlplus on the machine hosting the db where the link is defined. In other words, given:
Host 'Host-src', with database 'db-src', with a dblink 'lk_target'
Host 'host-trgt', with database 'db-trgt'
When you connect to db-src and access lk-target, db-src is now acting as a client to db-trgt. Exactly as if you had opened sqlplus on host-src and connected directly to db-trgt. So, given the above scenario
host-src$> sqlplus scott/tiger@db-src
sql> select * from emp@lk_target;when you execute that SELECT to the link, the same tns considerations are in effect as if you had
host-src$> sqlplus scott/tiger@db-trgtThe same tnsnames.ora entry, on the source machine, is required for both.

How to create a database link ?

i want to create a database link.please give mesteps

There is a chapter in the DBA Administration manual for versions 8.1, 9.2, and 10g on this topic which provide all the information you need.
You will need to choose the type of database link: global, current user, or imbedded user and if you need a public or private link.
Basically all you do is create a tnsnames.ora entry for the remote db and then create a database link (See SQL manual entry CREATE DATABASE LINK) that references the tnsnames.ora entry.
The manuals or the entire manual set can be downloaded from technet.
HTH -- Mark D Powell --

How to create a database link in someone else's schema?

I have access to Sys, but I don't have the passwords to all personal accounts. generally if you have a create any privilege you just do
create <object> <schema>.object_name ....
if i try this with a database link, the link gets created in my schema with the first part as part of its name.
so
create database link <user>.<db link> does not put the link in the other schema.
what do I do?

I assume Sybrand's suggestion works, but it is common not to know the schema passwords (who wants to remember them anyway?).
We use the time tested "db_su.sql" script:
-- db_su.sql: connect as another user
set term off
store set sqlplus_env rep
set pages 0 feed off ver off echo off term off
DEF user=&1
spo temp.sql
conn / as sysdba
select 'alter user &user identified by values '''||password||''';'
from dba_users where username = UPPER('&user')
spo off
alter user &user identified by temp;
connect &user/temp
START temp.sql
@sqlplus_env
set term on:p

How to create a database link to connect to Progress

I using 10g (10.2.0.4) and want to connect to progress 9.x using a databaselink.
Which are the steps, examples to acomplish this?.

You have to use the 11g Database Gateway for ODBC (DG4ODBC) to connect from Oracle 10.2.0.4 to Postgres.There's a note on My Oracle Support how to configure the gateway - please have a look at:
How to Configure DG4ODBC on 64bit Unix OS (Linux, Solaris, AIX, HP-UX Itanium) to Connect to Non-Oracle Databases Post Install (Doc ID 561033.1)
I would recommend you to use the latest gateway release (11.2.0.3) which can be downloaded from My Oracle Support portal as well. Just click on Patches and Updates and look for the 11.2.0.3 patch set:
Patch 10404530: 11.2.0.3.0 PATCH SET FOR ORACLE DATABASE SERVER
Although it is a patch set this software can also be used to install the gateway from scratch.
Check out the readme as it lists which ZIP file contains the gateway software you have to download.
The DG4ODBC gateway is for free and its license is included in the Oracle database license. You only need to make sure you have a suitable ODBC driver which is able to connect to your Postgres database.
Best regards,
Klaus

How to create a database link to SQL Server from a RAC environment

We have a 4 node RAC running 11.2.0.3 binaries on 64-bit linux.
Grid owns the listener named listener.
Oracle owns the database.

Thanks all! But I tried to configure and I am getting
TNS-01201: Listener cannot find executable /u01/app/oracle/product/11.2.0.3/dbhome_1/bin/InfoEdb10 for SID InfoEdb10
Listener failed to start. See the error message(s) above...
So! What I did was
1. Configure the odbc from the OS (only one node) and create the DSN and its odbc files. connectivity works from Operating Systems.
2. Create the listener entry (under GRID) user.
3. Create the remotedb.ora file under $ORACLE_HOME/hs/admin
--- Here is listener.ora file
LISTENER_NODE1_TG =
   (DESCRIPTION_LIST =
    (DESCRIPTION =
       (ADDRESS = (PROTOCOL = TCP)(HOST = devrac-a-01-vip.cssd.pitt.edu)(PORT = 1549)(IP = FIRST))
       (ADDRESS = (PROTOCOL = TCP)(HOST = devrac-a-01.cssd.pitt.edu)(PORT = 1549)(IP = FIRST))
SID_LIST_LISTENER_NODE1_TG =
   (SID_LIST =
       (SID_DESC =
         (SID_NAME = InfoEdb10)
         (ORACLE_HOME = /u01/app/oracle/product/11.2.0.3/dbhome_1)
         (ENVS = "LD_LIBRARY_PATH=/u01/app/oracle/product/11.2.0.3/dbhome_1/lib")
         (PROGRAM = InfoEdb10)
any help is appreciated

ERROR WHILE CREATING A DATABASE LINK USING HETEROGENEOUS SERVICES

I'm creating a database link with the Oracle Dataware Builder, and i get the following error:
Probando...
Fallo.
SQL Exception
Error del repositorio: Excepción SQL.
Nombre de la Clase: CacheMediator.
Nombre del Método: getDDEntryFromDB.
Mensaje de Error del Repositorio: ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[Generic Connectivity Using ODBC][Informix][Informix ODBC Driver][Informix]Incorrect password or user [email protected] is not known on the database server. (SQL State: 28000; SQL Code: -951)
ORA-02063: preceding 2 lines from PRUEBA_SEH
As you can see i'm using heterogeneus services to connect to a informix database. ALTIADM is a valid user for that database, i don't send my ip address 192.168.0.62, but the error says "[email protected] is not known in the database server". how can i solve it?????

Right places to ask this question are
Heterogeneous Connectivity
Warehouse Builder

How to Execute a Remote Procedure in Portal using Database Link

Hi,
I followed the instructions to create a Portal form for a remote procedure. But I am encountering the following error. Can someone advise what may be the cause?
Failed to execute - Missing string(create_package_body) language(us) domain (wwv) sub_domain (wwv_builder) (WWV-04300)
ORA-04020: deadlock detected while trying to lock object PUBLIC.PORTLET_SCHEMA (WWV-11230)
Failed to parse as PORTAL - (WWV-08300)
PURPOSE
How to execute a remote procedure in Portal using Database Link.
DESCRIPTION
This procedure assumes that you have two databases, one of which is remote, and Portal is configured in the other.
Remote Database A:
==================
1) Create a procedure as follows: Create or Replace PROCEDURE SCOTT.ADD_TWO_VALUES ( v_one IN NUMBER, v_two IN NUMBER, v_result OUT NUMBER) as begin v_result :=v_one+v_two; end; 2) Grant execute privileges to PUBLIC on the procedure.
Database B (where Portal is configured): ========================================
1) Create a public database link and choose to connect as a specific user (say SYSTEM). By default, in an Oracle 8i database, the "global_names" parameter in initSID.ora (or init.ora) file is set to "true". This Global Naming parameter enforces that a dblink has the same name as the database it connects to. Therefore, if the remote global database (A) name is "ora8.acme.com" then the database link should also be named as "ora8.acme.com".
2) Create a synonym for the procedure in Database A. Make sure you fully qualify the procedure name in the remote database (like SCOTT.ADD_TWO_VALUES).
3) Create a dynamic page to execute the procedure. The ORACLE tags in the dynamic page will look similar to the following: <ORACLE> DECLARE v_total NUMBER; BEGIN ADD_TWO_VALUES(:v_one,:v_two, v_total); htp.p('The total is => '); htp.p('<input type="TEXT" VALUE='||v_total||'>'); htp.para; htp.anchor('http://<machine.domain:port#>/pls/portal30/SCOTT.DYN_ADD_TWO_VALUES.show_parms', 'Re-Execute Procedure'); END; </ORACLE>
4) Portal does not have an option to create a form based on a synonym. Therefore, if you want to create a form instead of a dynamic page, create a wrapper procedure and then create a form based on this procedure. For example: Create or Replace PROCEDURE PORTAL30.ADD_TWO_VALUES_PR ( v_one IN NUMBER, v_two IN NUMBER, v_total OUT NUMBER) as begin add_two_values(v_one, v_two, v_total); end;
5) Grant execute privileges to PUBLIC on the procedure.

hello...
any input will welcomed... Thanks..

Error while creating materialized view which using database link

Helo!
I'm getting error "ORA-00942: table or view does not exist" when I want to create materialized view.
Details:
1. On destination database I create a database link:
CREATE DATABASE LINK SDATABASE
CONNECT TO MYUSER
IDENTIFIED BY MYUSERPASS
USING 'ORCL';
=> Command "SELECT * FROM TABLE1@SDATABASE" returns data normally!
2. On source database I create MATERIALIZED VIEW LOG:
CREATE MATERIALIZED VIEW LOG
ON TABLE1
WITH PRIMARY KEY
INCLUDING NEW VALUES;
3. Now, when I want to create MATERIALIZED VIEW on destination database:
CREATE MATERIALIZED VIEW TABLE1
REFRESH FAST
START WITH SYSDATE
NEXT SYSDATE + 1/1440
WITH PRIMARY KEY
AS SELECT * FROM TABLE1@SDATABASE;
...I get error "ORA-00942: table or view does not exist"!
How is that possible if command "SELECT * FROM TABLE1@SDATABASE" returns data normally?
Thanks,
Voranc

And, I'm using Oracle 10g.
Voranc

Creating user using database link

Hi
I have 11g installed on one of the server
I have created the database link BUGAU to bugau.us.oracle.com
link works fine
select * from table@"Bugau" gives the expected result
I need run the below statement from my server using the dblink.but not sure how to use the dblink for this purpose.Please assit
CREATE USER ABC IDENTIFIED BY welcome DEFAULT TABLESPACE USERS_001 TEMPORARY TABLESPACE temp123;
GRANT DEFAULT TO abc;
ALTER USER abc PROFILE LEVEL_1;
Thanks
Archana

as mentioned in oracle documentation for db link purpose: you can use it for accessing schema objects in remote database..
http://download.oracle.com/docs/cd/B28359_01/server.111/b28286/statements_5005.htm
>
Use the CREATE DATABASE LINK statement to create a database link. 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. However, to access non-Oracle systems you must use Oracle Heterogeneous Services.
After you have created a database link, you can use it in SQL statements to refer to tables and views on the other database by appending @dblink to the table or view name. You can query a table or view on the other database with the SELECT statement. You can also access remote tables and views using any INSERT, UPDATE, DELETE, or LOCK TABLE statement.
>
For creating users, you have to login to the remote database itself, You also need to login using the user who has the necessary credentials to create the user.
Regards,
Dipali.

How to create citadel database and link it to an existing project library programatically?

hi,
does anyone knows how to create citadel database progarmatically and linking it with my project library programatically?
samriddh sarbalhi
[email protected]

hi,
i have designed an application having four security levels like administrators, engineers, operators & guests.
now i want that whenever the guest logins in my application, windows components on the desktop will not be accessible to him means he can only view my application but he will not be able to view start menu on the task bar of the windows page or any icon on the desktop.
please tell me how to accomplish it progarmatically using labview.
the appropriate response will be highly appriciable.
thanks
samriddh sarbalhi
[email protected]

Not able to create a database link using the database gateway of oracle 11g

HI,
While trying to create a database link to SQL server from Oracle ,using the database gateway provided with 11g, i am getting the following error while making use of it in selecting columns from tables :
Error starting at line 1 in command:
select * from test1@dblink
Error at Command Line:1 Column:20
Error report:
SQL Error: ORA-28513: internal error in heterogeneous remote agent
ORA-02063: preceding line from DBLINK
These are the steps i have followed for setting up:
1.Ran the set up for the Database gateway.and mentioned the SQL server name and database .ALos set up a listener.
2. Added the following in the Listener.ora of Oraclehome 11/NETWORK/ADMIN:
LISTENER_SQL_FCD =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST =localhost) (PORT = 1541)
SID_LIST_LISTENER_SQL_FCD =
(SID_LIST =
(SID_DESC =
(SID_NAME=dg4msql)
(ORACLE_HOME= D:\app\20537\product\11.1.0\db_3)
(PROGRAM=dg4msql)
3.Added the following in tnsnames.ora inOracle home/NETWORK/ADMIN:
dg4msql=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=localhost)(PORT=1541))
(CONNECT_DATA=(SID=dg4msql))
(HS=OK)
4. Following is the entry in initdg4msql.ora in C:\product\11.1.0\tg_5\dg4msql\admin:
HS_FDS_CONNECT_INFO=10.148.45.242:1433//SalesDemo
HS_FDS_TRACE_LEVEL=DEBUG
HS_FDS_RECOVERY_ACCOUNT=RECOVER
HS_FDS_RECOVERY_PWD=RECOVER
5. Created the database link :
create database link dblink
connect to "sa" identified by "<pswd>"
using 'dg4msql'
On running :select * from test1@dblink i get the following error:
Error starting at line 1 in command:
select * from test1@dblink
Error at Command Line:1 Column:20
Error report:
SQL Error: ORA-28513: internal error in heterogeneous remote agent
ORA-02063: preceding line from DBLINK
Is there any issue with the set or definition that I get the above error?

What is the version of the Oracle database in which you have specified/and use the database link?
If it is for example 10.2.0.3.0 you need to apply the mandatory patch for RDBMS bug 5965763 first before being able to use an 11g gateway. Have a look at MetaLink note 457808.1 for details about this patch.
Regards,
Ed

How to fetch,update,insert the data using database link on diff. servers

I am using two oracle server.
1st) Oracle 9i ( Server1 )
2nd) Oracle 10g ( Server2 )
3) Forms 6i
I have created a database link on Server 1 for connecting to Server 2.
I written a piece of code which will be executed in Forms 6i and is connected to Server1.
The piece of code brings the data from SErver2 via cursor and I try to insert / update the relevant records
in my Server1 database users.
The Insert/Update runs sucessfully but at the time of commit I get the following errors
in Forms ORA-01041:internal error. hostdef does not exist.
Then it forcefully rollback the data and come out of the application.
contact :email-id : [email protected]

Suggest you test your code from sqlplus before running from forms.
Start by testing a simple "select sysdate from dual@<database link>;" then test select from application_table@<database link> then test the insert/update code. After it works from sqlplus, then try it from forms.

How to create & use database links

Similar Messages

Maybe you are looking for