Database links between Oracle 10G and 7.1/7.3 & 8.0 databases

Hi All..
Unfortunately one of our customers is still using very very old unsupported versions of the database - 7.1 and 7.3 and 8.0. They wish to start an upgrade process - moving up to 10G (via staged upgrades) but wish to know whether they can still access information from old databases via database links.
I know that the Oracle 10G client cannot connect to database versions this old, and I am presuming that the database itself cannot via DB links but I thought it wise to check.
Any help appreciated. Thank you.

Oracle 10.1 is certified to connect to 8.1.7 and later. Database links to earlier versions are not certified and generally do not work.
The general solution to this sort of thing tends to be putting an older version of the database (8.1.7 or 9.0.1, usually) between the ancient databases and the new database. 10.1 can create a database link to 9.0.1. 9.0.1 can create a database link to 7.3.4 and create views that reference remote 7.3.4 objects that the 10.1 system can query. Of course, you're taking data over the network twice, so performance isn't ideal, but it can work in a pinch.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Similar Messages

Database link between Oracle 11g and MS Sql Server 2005 EE

Hi everybody,
I trying to create database link from Oracle 11g to MS Sql and I'm not succesful.
I found tutorial for Oracle 10g, but it does't work.
I created odbc data source, then I modified tnsnames.ora and listener.ora, then I created initkw.ora in HS directory and then I created dabase link, but it does't work.
Can you help me please? Thanks for help ... ondra
Tnsnames.ora:
KW =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = tcp)(HOST = oracle_ip)(PORT = 1521))
(CONNECT_DATA =
(SID = KW)
(HS = OK)
listener.ora:
(SID_DESC =
(SID_NAME = KW)
(ORACLE_HOME = C:\oracle\product\11.1.0\db_1)
(PROGRAM = hsodbc)
initkw.ora
HS_FDS_CONNECT_INFO = kw
HS_FDS_TRACE_LEVEL = 0
HS_FDS_TRACE_FILE_NAME = kw.trc
create public database link KW connect to "user" identified by "pass" using 'KW';
Message was edited by:
user598176

Hi, I get two errors.
ORA-28545 - NET8 mistake Unable to restrieve textof NEWTWORK/NCR message 65535
and then ORA-02063
zenda
I resolved one of error, I have wrong ip.
But now I have another error:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[Generic Connectivity Using ODBC][Microsoft][ODBC Driver Manager] Data source name
not found and no default driver specified (SQL State: IM002; SQL Code: 0)
I have ODBC data source in system DSN
PS: Our Oracle 11g database is 64 bit version
Message was edited by:
user598176

DB Link between Oracle 10g and Oracle 9i

Hi all,
Please help me to set the dblink between oracle9i and oracle10g.
Thanks in advance
Regards
K. Mahipal Reddy

Well... it depends on what type of link you wish to create.
If you have same user with same password on both databases (9i and 10G), then you can create a public database link as
CREATE PUBLIC DATABASE LINK dblink USING 'dbalias';
Note: dbalias is the value from your TNSNAMES.ORA. The database from which you are creating the db link has to have the entry in TNS for other database.
Other method is to create a private db link
CREATE DATABASE LINK dblink CONNECT TO user IDENTIFIED by pwd using 'dbalias';
The number of open connections from a particular database is governed by init parameter DB_LINKS (this was in 8i.. not sure about higher versions)
HTH...
Message was edited by:
satishkandi

DB Link between Oracle 10g and Oracle 9i for CLOB data type

How do I transport XMLType or CLOB from oracle 9i to Oracle 10G using DBLink?
Is any restrction to DBLink, while transfering CLOB with XML data from oracle 9i to Oracle 10G?
Please let me know how i resolve this issue.
Thanks in advance.
DK

Well... it depends on what type of link you wish to create.
If you have same user with same password on both databases (9i and 10G), then you can create a public database link as
CREATE PUBLIC DATABASE LINK dblink USING 'dbalias';
Note: dbalias is the value from your TNSNAMES.ORA. The database from which you are creating the db link has to have the entry in TNS for other database.
Other method is to create a private db link
CREATE DATABASE LINK dblink CONNECT TO user IDENTIFIED by pwd using 'dbalias';
The number of open connections from a particular database is governed by init parameter DB_LINKS (this was in 8i.. not sure about higher versions)
HTH...
Message was edited by:
satishkandi

Database link between oracle and sql server

dear all,
i m a newbie to oracle and i need your help to know how to create a database link between oracle and sql server.my oracle version 10.2.0.3 and platform is redhat linux 5.7.your help appreciated.
thanks in advance.

[oracle@localhost ~]$ rpm -qa | grep -i odbc
php-odbc-4.3.9-3.15
unixODBC-kde-2.2.11-1.RHEL4.1
MyODBC-2.50.39-21.RHEL4.1
postgresql-odbc-7.3-8.RHEL4.1
freeradius-unixODBC-1.0.1-3.RHEL4.3
qt-ODBC-3.3.3-9.3
unixODBC-devel-2.2.11-1.RHEL4.1
unixODBC-2.2.11-1.RHEL4.1
is this showing odbc installed in os?

Important differences between oracle 10g and 11g

Hi friends, can anyone tell me (pointwise) what are the major (and minor) differences between Oracle 10g and 11g.
Please point me to some documents if possible.
Thanks in advance

The name of the link says it all: "top_features."
In short it is Oracle's list of what they have for marketing and sales reasons designated "top features."
It is not intended to be, and is not, a complete list of features. Often the features Oracle does not
talk about are the most important.
Let me give you some examples. I have never seen Oracle announce DBMS_XPLAN as a new feature
yet you should not run an explain plan without it. Neither have I ever seen Oracle announce the new
NO_DATA_NEEDED predefined exception. I have listed literally hundreds of new features you will not
find in Oracle's new features docs.
I did a presentation at OpenWorld this year as part of the unconference titled "New Features in
Database 11gR2 that Oracle will not announce." It was easy to prepare a one hour presentation with
little fear of being proved incorrect. As I turned out only one of the features I presented was mentioned
by Oracle.
You can find the presentation slides here:
http://www.morganslibrary.org/pres/oow09_ucnf.pdf

How to create dblink between oracle 10G and mysql

I want to create dblink between oracle 10G and mysql
I create it in ECC6.0 using DBCO transaction tcode,which database type can choose?Microsoft sql server?Because there have no mysql item.
I choosed MSS so that I can test it, but it failed,there is an error that 'ORA-12569:TNS:packet checksun failure'.
I configured the oracle tnsnames.ora file like this:
     CW.WORLD =
           (DESCRIPTION =
                (ADDRESS_LIST =
                      (ADDRESS =
                              (COMMUNITY = SAP,WORLD)
                              (PROTOCOL = TCP)
                              (HOST = XX.XX.XX.XX)
                              (PORT = XXXX)
               (CONNECT_DATA =
                    (SID = XXX )
               (HS = ok )
When I tnsping CW,it will fail,like this " TNS-12569:TNS:packet checksum failure"
How can I do.

I want to know if this possible?

Diff between oracle 10g and 11g

Can any one could tell me what is the main diff between oracle 10g and 11g ?
Thanks in Advance
Venkat

Hi,
You can read
http://www.oracle.com/technetwork/articles/sql/index-082320.html
http://www.oracle.com/technetwork/articles/sql/index-099021.html
Anand

DB link between Oracle 9i and MS SQL server2000

Hi,
Is it possible to create a DB link between Oracle 9i and MS SQL server 2000.
If it is possible what are the different ways of creating it.
Is it possible without purchasing any propietery drivers.
Thanks,
Rohit

I've never seen any documents stating that the enterprise edition is a requirement for the heterogeneous connectivity ....
There are 2 ways to set up the connection with MS SQL - using generic connectivity driver (OLE DB or ODBC) or using the Oracle Transparent Gateway.
The generic connectivity is free and comes with Oracle DB - it has several limitations - for example you can't call MS SQL stored procedures from Oracle.
The Oracle Transparent Gateways are packaged , the MS SQL gateway is part of the Open System Gateways package ($15,000.00 per CPU license cost) and i has less restrictions.
Overview:
http://www.oracle.com/technology/products/oracle9i/datasheets/gateways/gateway_rel2_ds.html
http://www.lc.leidenuniv.nl/awcourse/oracle/server.920/a96544/toc.htm
Chapter 4 - the Oracle Transparent Gateway
Chapter 7 - the free Generic connectivity.
Mike

How to create database link between oracle and SQL Server

Hello Everyone,
Here i have Oracle Database 9i and SQL Server 2005 databases.
I have some tables in sql server db and i want to access from Oracle.
How to create a database link between these two servers
Thanks,

Thanks for Everyone,
I was struggle with this almost 10 days....
I created Database link from Oracle to SQL Server
Now it is fine.........
Here i am giving my servers configuration and proceedure how i created the db link...@
Using Generic Connectivity (HSODBC) we can create db link between Oracle and SQL server.
Machine (1)
DB Version : Oracle 9.2.0.7.0
Operating System : HP-UX Itanuim 64 11.23
IP : 192.168.0.31
Host : abcdbt
Machine (2)
Version : SQL Server 2005
Operating System : Windows server 2003 x86
IP : 192.168.0.175
Host : SQLDEV1
User/PW : sa/abc@123! (Connect to database)
Database : SQLTEST (exsisting)
Table : T (“ T “ is the table existing in SQLTEST database with 10 rows)
Prerequisites in Machine (2):
a)     Oracle 10g software
b)     User account to access SQL Server database (sa/abc@123!)
c)     Existing SQL Server Database (SQLTEST)
d) Tables (testing purpose) (T)
Steps:
1)     Install Oracle 10.2.0.1 (Only SW,No need of database) *(Machine 2)*
2)     Create a DSN where your windows Oracle 10g SW resides *(Machine 2)*
Control panel >> Administrative Tools >> Data Source (ODBC) >> System DSN ADD
You can follow this link also.....
http://www.databasejournal.com/features/oracle/article.php/3442661/Making-a-Connection-from-Oracle-to-SQL-Server.htm
I created DSN as
DSN name : SQLTEST
User : SA/abc@123! (Existing user account)
Host : 192.168.0.175 (machine 2)
Already I have 1 database in SQL Server with the name SQLTEST
You can create DSN with different name also (not same as db name also)
3)     Create a hsodbc init file in $ORACLE_HOME\hs\admin *(Machine 2)*
Create init<DSN NAME> file
Ex: initSQLTEST
Copy inithsodbc to initSQLTEST
And edit
initSQLTEST file
HS_FDS_CONNECT_INFO = SQLTEST    <DSN NAME>*
HS_FDS_TRACE_LEVEL = OFF*
save the file....@
4)     Configure Listener.ora *(Machine 2)*
LISTENER_NEW =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.175)(PORT = 1525))
SID_LIST_LISTENER_NEW =
(SID_LIST =
(SID_DESC =
(SID_NAME = SQLTEST) *+< Here SQLTEST is DSN NAME >+*
(ORACLE_HOME = G:\oracle 10g\oracle\product\10.2.0\db_1)
(PROGRAM = hsodbc))
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = G:\oracle 10g\oracle\product\10.2.0\db_1)
(PROGRAM = extproc) )
:> lsnrctl start LISTENER_NEW
5)     Configure tnsname.ora *(Machine 2)*
SQLTEST11 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.175)(PORT = 1525))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = SQLTEST))
(HS=OK)
:> tnsping SQLTEST11
If No errors then conti….
6)     Configure a file *(Machine 1)*
Cd $TNS_ADMIN ($ORACLE_HOME/network/admin)
Create a file
$ vi TEST_abcdbt_ifile.ora
something=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST =192.168.0.175) (PORT=1525))
(CONNECT_DATA=
(SID=SQLTEST))
(HS=OK)
$ tnsping something
$ sqlplus system/manager
Your connected to Oracle database *(machine 1)*
create database link xyz connect to “sa” identified by “abc@123!” using ‘SOMETHING’;
select * from t@xyz;10 rows selected.
Thanks,
Edited by: ram5424 on Feb 10, 2010 7:24 PM

What are the major differences between oracle 10g and oracle express 10g

Hi
Can anyone tell, What are the major differences between[b] oracle 10g and oracle express 10g.
Or if you know any URL, then please do let me know.
Advance Thanks
JC

Dear sir,
here it is.
http://www.oracle.com/database/product_editions.html

HSODBC connectivity between ORACLE 10g and SQL Server 2008 R2

Hi,
I'm getting below error when using the DB link between Oracle (10.2.0.2 which is on Sun Sparc) and MS Sql server 2008 R2.
ERROR at line 1:
ORA-28500: connection from ORACLE to a non-Oracle system returned this message:
[Generic Connectivity Using ODBC][Microsoft][ODBC Driver Manager] Data source
name not found and no default driver specified (SQL State: IM002; SQL Code: 0)
ORA-02063: preceding 2 lines from SCOPEX.WORLD
My Config files:
On Sun Sparc 5.9 where Oracle server is running.
TelemetryDB1 =
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=172.16.6.48)(PORT=1522))
(CONNECT_DATA=(SID=TelemetryDB1))
(HS=OK)
Listener.ora file on Windows machine:
TelemetryDB1 =
(ADDRESS_LIST=
(ADDRESS=(PROTOCOL=tcp)(HOST=172.16.6.48)(PORT=1522))
(ADDRESS=(PROTOCOL=ipc)(KEY=PNPKEY))
SID_LIST_TelemetryDB1 =
(SID_LIST=
(SID_DESC=
(SID_NAME=TelemetryDB1)
(ORACLE_HOME=C:\oracle\product\10.2.0\db_1)
(PROGRAM=hsodbc)
Tnsnames.ora file:
TelemetryDB1 =
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=172.16.6.48)(PORT=1522))
(CONNECT_DATA=(SID=TelemetryDB1))
(HS=OK)
initTelemetryDB1.ora file under ORACLE_HOME\hs\admin\
HS_FDS_CONNECT_INFO = TelemetryDB1
HS_FDS_TRACE_LEVEL = OFF
We have created DNS with TelemetryDB1.
I'm getting the above error for DB links between Oracle 10.2 and SQL Server 2008 R2. But the same, when configured for MS SQL server 2000 works fine without any issues.
Please advise me to rectify the error. We've been working for the last couple of weeks.
Regards,
Sunil

Sunil,
You don't need an Oracle ODBC driver.
The way it works is that in the gateway init<sid>.ora file, in your case initTelemetryDB1.ora, the parameter HS_FDS_CONNECT_INFO points to a system DSN. This DSN should then be configured to use an ODBC driver to connect to the non-Oracle database. So, in your setup when you want to access the SQL*Server 2008 database then the DSN should use an ODBC driver that can connect to a SQL*Server 2008 database. If you still use the initTelemetryDB1.ora file for the connection then the TelemetryDB1 DSN should be configured to access the SQL*Server 2008 database.
However, there are a couple of problems with your actual setup -
- the configuration you have - 10.2 RDBMS on a Sun machine and HSODBC on Windows - is not supported. HSODBC should only be used from a RDBMS that is in the same ORACLE_HOME as HSODBC.
- 10.2 HSODBC is now desupported and has been replaced by the 11g Database Gateway for ODBC (DG4ODBC) and the configuration you want is supported. That is because unlike HSODBC the DG4ODBC gateway can be installed standalone with a RDBMS being installed.
I recommend that you download and install 11.20.2 DG4ODBC on your Windows machine in a new Oracle_home and access that from the 10.2 RDBMS on Sun - which is a supported configuration. But to do this, you will need to apply either the 10.2.0.4 or 10.2.0.5 patchset to your RDBMS.
There is more information in the following note available on My Oracle Support (MOS) -
Note.1083703.1 Master Note for Oracle Gateway Products
The 11.2.0.2 DG4ODBC can be downloaded from MOS as patch and for the gateways on Windows 32-bit you just need to download -
p10098816_112020_platform_4of6.zip
However, to check the HSODBC ou need to confirm that the DSN used by HSODBC points to a System DSN configured to access SQL*Server 2008.
Have a look at -
Note 109730.1 How to setup generic connectivity (HSODBC) for Windows NT
But remember this is not a supported version or configuration and you should be using Dg4ODBC.
Regards,
Mike

Differences between oracle 10g and 9i

where do we differe in oracle 10g and oracle 9i
when we will be working with SQL and PL/SQL
Please help me

http://download.oracle.com/docs/cd/B14117_01/server.101/b10750/toc.htm
is what you are looking for.

What is Database Links in Oracle 10g ?

Same as subject.
Thanks.

Hi,
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 that contains the data dictionary entry.
A database link connection is one-way in the sense that a client connected to local database A can use a link stored in database A to access information in remote database B, but users connected to database B cannot use the same link to access data in database A. If local users on database B want to access data on database A, then they must define a link that is stored in the data dictionary of database B.
A database link connection allows local users to access data on a remote database. For this connection to occur, each database in the distributed system must have a unique global database name in the network domain. The global database name uniquely identifies a database server in a distributed system.
http://download-uk.oracle.com/docs/cd/B19306_01/server.102/b14231/ds_concepts.htm#i1007709
Adith

Database link between Oracle Standard Edition and Oracle Enterprise Edition

Hi,
I am looking at setting up a data transfer process between an Oracle 11g Enterprise Edition database and an Oracle 11g Standard Edition database. Database links would be required each way.
I heard once that this is not permitted as connecting Standard to Enterprise via a DB Link means that the Standard Edition database would now need an Enterprise license.
I have searched around but can't find anything to confirm this. Am I being mislead by this information? Is it permitted to
connect Standard to Enterprise via a DB Link?
John

John O'Toole wrote:
Hi,
I am looking at setting up a data transfer process between an Oracle 11g Enterprise Edition database and an Oracle 11g Standard Edition database. Database links would be required each way.
I heard once that this is not permitted as connecting Standard to Enterprise via a DB Link means that the Standard Edition database would now need an Enterprise license.
============================================================================
Where did you hear that?
--- On the internet
And you believed it?
--- Sure. They can't put anything on the internet that isn't true
Where did you hear that?
--- On the internet.
============================================================================
I have searched around but can't find anything to confirm this. Am I being mislead by this information? Is it permitted to
connect Standard to Enterprise via a DB Link?I would be shocked if it were not permitted due to licensing issues. When a db-1 has a link pointing to db-2, as far as db-2 is concerned db-1 is just another client .. no different than sqlplus. If you have an Enterprise Edition database, of course it will need to be properly licensed. But that doesn't mean all of its clients (including a SE database) have to be EE licensed.
But even my reply is just something you read on the internet. Licensing questions can only be definitively answered by Oracle itself. Ultimately you will need to put your hands on an official Oracle document or a written statement from someone authorized to make such statements.
>
John

Database links between Oracle 10G and 7.1/7.3 & 8.0 databases

Similar Messages

Maybe you are looking for