Create public Database link

I have two computers at my training lab. Both have computer Oracle 9i install. Bith have service/tag cats.
1.)
Computer Name : 10227-mr-srv.abc.com
Oracle service name : cats
2.)
Computer Name : 10227-ocrsrv.abc.com
Oracle service name : cats
Now from 1st oracle server, I want to connect to 2nd oracle server.
May be using fixed user hr Password hr_1.
Can you please give exact CREATE PUBILC DATABASE LINK statement for same.
May have to use identifier as creating loop.

You can check out the syntax and examples here

Similar Messages

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.

A question about CREATE PUBLIC DATABASE LINK and ORA-12154 error

Dear all,
I have a problem about public database link creation and I would appreciate if you could kindly give me a hand. I have the following connection parameters in my
tnsnames.ora file:
DGPAPROD.WORLD =
     (DESCRIPTION =
       (ADDRESS_LIST =
        (ADDRESS = (COMMUNITY=tcp.world)
          (PROTOCOL=TCP)(HOST=ORASR001)(PORT=1521)
       (CONNECT_DATA = (SID = DGPAPROD))
...Having the above mentioned parameters I can connect to this remote database directly in a SQL*Plus shell:
$ sqlplus username/[email protected] works pretty well and the connection is established without any problem.
Now, what I would like to do is to create a public database link to this remote database in order to avoid the user/connection switching for viewing the
content of this database. I proceeded according to the syntax indicated in the Oracle online documentation:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28286/statements_5005.htm#SQLRF01205
Therefore I run the following in order to create a public database link
CREATE PUBLIC DATABASE LINK SR001_dblink CONNECT TO user IDENTIFIED BY password USING 'DGPAPROD.WORLD';Apparently there is no error and the link is created successfully. However it cannot resolve the remote host and whenever I run the following query
(myenterprise is the name of a table in that remote database)
SELECT *
FROM myenterprise@SR001_dblink
ERROR at line 1:
ORA-12154: TNS:could not resolve the connect identifier specifiedWhat causes this problem?
Thanks in advance,
Kind Regards,
Dariyoosh

spajdy wrote:
You must have defined DGPAPROD.WORLD in tnsnames.oar on server where you DB is runnig.Hello there,
Thanks a lot for this nice solution. In fact I had to add the connection parameters into the tnsnames.ora file of the server on which the link was created (not the tnsnames.ora of my oracle client stored on the localhost)
After a bit googling I found another solution that allows to create the database link:
CREATE PUBLIC DATABASE LINK SR001_dblink CONNECT TO user IDENTIFIED BY password USING '(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (COMMUNITY=tcp.world)
(PROTOCOL=TCP)(HOST=ip_adresse)(PORT=1521)))(CONNECT_DATA = (SID = GPAPROD)))';Thanks a lot for your help!
Kind Regards,
Dariyoosh
Edited by: dariyoosh on 18 nov. 2009 07:15

ORA-31600 when trying to view SQL DDL for a created public database link

I created and committed a public database link and I can access the external database.
When I try to view the DDL of the link, on the SQL tab, I'm getting following error:
ORA-31600: invalid input value EMIT_SCHEMA for parameter NAME in function SET_TRANSFORM_PARAM
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 105
ORA-06512: at "SYS.DBMS_METADATA_INT", line 3900
ORA-06512: at "SYS.DBMS_METADATA_INT", line 4048
ORA-06512: at "SYS.DBMS_METADATA", line 836
ORA-06512: at line 1
and
ORA-31600: invalid input value LONGNAME for parameter NAME in function SET_FILTER
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 105
ORA-06512: at "SYS.DBMS_METADATA_INT", line 1980
ORA-06512: at "SYS.DBMS_METADATA_INT", line 3665
ORA-06512: at "SYS.DBMS_METADATA", line 670
ORA-06512: at "SYS.DBMS_METADATA", line 571
ORA-06512: at "SYS.DBMS_METADATA", line 1221
ORA-06512: at line 1
Is this because of a bug in SqlDeveloper or because the db_link and host parameters have 33 characters?
I'm using sql developer 1.5.3, build MAIN-5783
tx,
Roger Vermeir

It's probably the length; really all sqldev does is calling:
select DBMS_METADATA.get_ddl('DB_LINK',:NAME,:OWNER) FROM dual;So if you call it a bug, it's a database bug in the DBMS_METADATA package.
But if you work with identifiers over 30 chars, I'd say that's a bug on it's own...
FWIW, I can't reproduce this on our 10g DB; are you on 9i?
Regards,
K.

Creating a Database link for a user

Hello All,
I am trying to create a database link for one of my users.
When I create it as sysdba the link gets created in the SYS schema which tells me that my syntax is working/fine.
But when I ALTER my SESSION and set my CURRENT_SCHEMA = <USER_NAME> I get ORA-00990: missing or invalid privilege
So I tried granting the user CREATE DATABASE LINK, CREATE PUBLIC DATABASE LINK, and DROP PUBLIC DATABASE LINK.
Same error.
Any ideas what I am missing?
Thanks,
Craig

CraigBoyd wrote:
Hello All,
I am trying to create a database link for one of my users.
When I create it as sysdba the link gets created in the SYS schema which tells me that my syntax is working/fine.
But when I ALTER my SESSION and set my CURRENT_SCHEMA = <USER_NAME> I get ORA-00990: missing or invalid privilege
So I tried granting the user CREATE DATABASE LINK, CREATE PUBLIC DATABASE LINK, and DROP PUBLIC DATABASE LINK.
Same error.
Any ideas what I am missing?
Thanks,
Craigyou need to create a new session after the GRANT was issued.

Create a database link to access SqlServer 2005 view from oracle 11gr2

Hi All,
Greetings for the day.
Though I have seen quite a few posts but just wanted to cross-verfiy and double check hence posting.
Oracle Database : 11gr2
OS :SOLARIS SPARC 64 Bit
SQL Server Database : Sql Server 2005
OS : Windows 2003 32 Bit
The requirement is to access a view residing in the SQL Server 2005 Database using the Oracle Database. This involves creation of a Database link in the Oracle Database to access the SQL Server.
Can you suggest which approach should i follow ( I am able to understand that both do the same job ):
How to Configure DG4MSQL (Oracle Database Gateway for MS SQL Server) 64bit Unix OS (Linux, Solaris, AIX,HP-UX) post install [ID 562509.1]or
How to Configure DG4ODBC on 64bit Unix OS (Linux, Solaris, AIX, HP-UX Itanium) to Connect to Non-Oracle Databases Post Install [ID 561033.1]Will they do the same job ? And can they be used on any OS and version of the SQL Server Database as version information for SQL Server is not specified anywhere?
Please let me know so that I can it forward with Business for approvals and budgetting.
Regards
KK

Your question is similar to the post: Oracle 11gr2 connection to Sql Server using dg4msql problem
Please visit: http://stackoverflow.com/questions/4658942/oracle-11gr2-connection-to-sql-server-using-dg4msql-problem
Answer on the website:
You seem to be using the Gateway for MySQL set-up rather than the Heterogeneous Gateway (for ODBC connections). Here is an overview of the process
On SQL Server create a database user and give it read access to the database/tables you want to read via the Oracle database link.
In the gateway home each SQL Server database you want to access should have an init.ora located in $OH/dg4msql/admin in the form initsid.ora where sid is the name of the database to be used in the link (e.g. initbob.ora), so create one
HS_FDS_CONNECT_INFO=msserver1:1234//Example_Database
HS_FDS_TRACE_LEVEL=OFF
HS_FDS_RECOVERY_ACCOUNT=RECOVER
HS_FDS_RECOVERY_PWD=RECOVER
HS_TRANSACTION_MODEL=READ_ONLY
You must now add the new sid to the listener.ora in the gateway home using an additional SID_DESC section inside the existing SID_LIST, for example
(SID_DESC =
(SID_NAME=bob)
(ORACLE_HOME=/oracle/gateway/product/11.2.0)
(ENVS=LD_LIBRARY_PATH=/oracle/gateway/product/11.2.0/dg4msql/driver/lib;/oracle/gateway/product/11.2.0/lib)
(PROGRAM=dg4msql)
You should now stop and restart the gateway listener so that the new sid becomes active. NB a reload is not enough.
You must now add the new sid in the tnsnames.ora file for the listener of each database in which you will create a link. You don't need to do this in the gateway home unless it is also a database home in which you will create a database link.
bob =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = severname.example.com)(PORT = 1690))
(CONNECT_DATA = (SID = bob))
(HS = OK)
NB: The host and port are for the gateway not for the SQL Server database
In each database that requires a link to the MS-SQL database you should create a database link to your new gateway sid.
CREATE PUBLIC DATABASE LINK bob
CONNECT TO "ms_user" IDENTIFIED BY "ms-passwd" USING 'bob';
where ms-user and ms-password are the SQL Server user you created right at the start.
Now you can test the new database link
SELECT COUNT(*) FROM "Table_Name"@bob;
Once you have this working you can alter the initsid.ora file to add parameters to suit your connection. If you do it this way you can easily add and manage many different databases via the gateway.
Hip
Edited by: 1000595 on 04:58 17-04-2013

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

Public Database Link

Hi All,
I am using Oracle 10g.
I created one Public database link as :
i created this database link by connecting ora1.
CREATE PUBLIC DATABASE LINK "ora2_1" CONNECT TO CURRENT_USER
USING 'ora2';
When i run the select query i am getting error. as:
i run this select query by connecting ora1 database.
SQL> SELECT * FROM C_UPDT@ora2_1;
SELECT * FROM C_UPDT@ora2_1
ERROR at line 1:
ORA-01017: invalid username/password; logon denied
ORA-02063: preceding line from ora2_1
What could be the problem.
Thanks

Hi..
I want to use that link for all schemas existed in ora2.so, i didnot specify the username, password.
>
The database link connects to the only one schema per db link in the target database.If you specify PUBLIC, then all the schemas in the source database (where the db link is created) can use and access data through it.So, if you want to create public database link for all the schemas in the target database ORA2, then you will have to create as many as schemas are present in ORA2.
Anand

Public database link username

Gentlemen,
I would like to recreate the public database links with new username and password. Prior to that, I want to know which user the current public database link in connecting to.
The dba_db_links table shows only the user name for private database links. Where can I find the username for public database link.
e.g.,
SQL> create public database link abc.domain.com connect to targetuser idenitified by targetpassword using 'abc.doman.com';
Where I find the information about targetuser; it is not shown in dba_db_links table for public database links.
Thanks

This indicates that the connection information (username/password) was not specified when the database link was created.
http://docs.oracle.com/cd/E11882_01/server.112/e25494/ds_admin002.htm#ADMIN12154
This implies that if user A on the local database tries to use this link, then the same account (i.e. A) with the same password exists on the remote database - i.e. all of the users on the local database that use this link are duplicated on the remote database as well.
HTH
Srini

Cann't Drop public database link

I am not able to drop public database link .
Oracle Version - 11.2.0.1.0 - 64bit Production
Os Version - Sun Solaris .
When I am going to drop a public database link it's give a error :
SQL Error: ORA-00604: error occurred at recursive SQL level 1
ORA-20000: Can not drop Object
ORA-06512: at line 2
00604. 00000 - "error occurred at recursive SQL level %s"
Can anyone help to resolve this problem? It is a Production Database and it's a Urgent .
Thanks,
Dip Sankar Rana

You say:
I already given syntax of creating Public database link.
But you should give real details (exact statements and exact results) to make it clear what you are attempting and what your problem is.
Please show:
- The CREATE PUBLIC DATABASE LINK statement (obscuring the password, of course) and its result (i.e. success or failure message)
- From each of schema1 (working) and schema2 (not working):
- - The result of SELECT USER FROM DUAL;
- - The result of SELECT USER FROM DUAL@DB_TST;
- - The result of SELECT COUNT(*) FROM ALL_OBJECTS@DB_TST WHERE OWNER = 'B1';
In the meantime, an observation.
You said:
I create a public db link from schema1 to other database using below command --
CREATE PUBLIC DATABASE LINK DB_TST
CONNECT TO B1 IDENTIFIED BY password
USING 'SPPROD'Note that any user (in caps: ANY USER) on this database can use this link to connect to database SPPROD as B1 without knowing the password - because you put the credentials in the link.
If you have a PUBLIC database link with credentials, like you do here, you have a serious, glaring security exposure. You really, REALLY should not do this. Use a private database link (available only to the user that created it) or do not put credentials on the link (so that any user using that link is using his own credentials to connect to the remote database).
Edited by: mtefft on Jan 14, 2011 4:14 AM

Cannot drop public database link

Hi all.
Just trying to drop some old database links and getting the following:
SQL> select * from dba_db_links where host = 'V638';
OWNER DB_LINK USERNAME HOST CREATED
PUBLIC V638 SYSADM V638 23-SEP-04
SQL> drop public database link V638;
drop public database link V638
ERROR at line 1:
ORA-02024: database link not found
There was another db link in there called V638.WORLD and when I issued
drop public database link v638 it removed that one with no errors...
Any way I can get rid of this other one?
Version info:
Oracle9i Enterprise Edition Release 9.2.0.4.0 - 64bit Production
PL/SQL Release 9.2.0.4.0 - Production
CORE 9.2.0.3.0 Production
TNS for Solaris: Version 9.2.0.4.0 - Production
NLSRTL Version 9.2.0.4.0 - Production
Thanks

Yes I already tried that...
SQL> select * from global_name;
GLOBAL_NAME
VTEST1.WORLD
SQL> alter database rename global_name to test.world;
Database altered.
SQL> alter database rename global_name to test.world;
Database altered.
SQL> select * from global_name;
GLOBAL_NAME
TEST.WORLD
SQL> drop public database link v638;
drop public database link v638
ERROR at line 1:
ORA-02024: database link not found
SQL> alter database rename global_name to vtest1.world;
Database altered.
SQL> select * from global_name;
GLOBAL_NAME
VTEST1.WORLD

Query the column names from Public database links

Greetings,
I would like to retrieve the list of all the column names from a public database link. A regular ALL_TAB_COLUMNS doesn't seem to be working.
Thanks
John9569

Hi,
I think your DBA needed to create a synonym for you to have access of that remote database view.
CREATE SYNONYM synonym_name
FOR view_name@db_link;Then you can find the column names by
DESC synonym_nameGuru's , please correct me If I am wrong.
Thanks
Edited by: user10679113 on Mar 12, 2009 12:28 PM
Edited by: user10679113 on Mar 12, 2009 12:33 PM

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 --

Create private database link

Hi,
I am currently working on a 92080 database on HPUX RISC platform.
I have a question regarding DB link.
There is already a public database link. I want to make it private since our organaization doesnt allow public database link.
OWNER                DB_LINK                        USERNAME             HOST                           CREATED
PUBLIC               DW.EADV.NA.JNJ.COM             GTWYCOMMAPP          HCSOP17.HCSPROD2.RAR.NCSUS.JNJ 05-APR-06
                                                                         .COM
PUBLIC               EDIDB.EADV.NA.JNJ.COM          USER4DBLNK           HCSOP12                        12-APR-06
PUBLIC               RAM_MART.EADV.NA.JNJ.COM       GTWYCOMMAPP          HCSOP30.hcsprod2.rar.ncsus.jnj 04-NOV-05
                                                                         .comMy question is -> If I want to create a private database link, should we login to each application schema and create the same?
Or can we create a private database link logging in as SYS/SYSTEM. Please let me know
Thanks!

You can create database link in one schema and after that you can create public synonym ,therefore all users can use this db link.
CREATE DATABASE LINK DBN
   CONNECT TO SMART IDENTIFIED BY sm
   USING 'SB222'
/You can create objects like view according this dblink and create publik synonym for this
Edited by: Chinar on Dec 3, 2010 8:39 AM

Create public Database link

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