ODBC from Oracle to an other Database (Postgresql)

Hello,
I heared that it is possible with Oracle to make a "Database Link" so in Oracle I can make a query like
select * from myshema.mytable@myexterndb where ....
Is such a database link allowed with the Express Edition and how will I do this?
Thank you,
Christian

Database links to/from other Oracle databases work. As follows
SQL*Plus: Release 10.2.0.1.0 - Beta on Mon Oct 31 11:56:42 2005
Copyright (c) 1982, 2005, Oracle. All rights reserved.
SQL> connect system
Enter password:
Connected.
SQL> create database link remote connect to hr identified by hr using 'xe';
Database link created.
SQL> select count(*) from employees@remote;
COUNT(*)
107
Note that this is doing a local loopback to the same database. However, you should also be able to access other Oracle databases provided you have the correct tnsnames.ora definition set up in the right directory - on my Windows system for the default XE install that is
C:\oraclexe\app\oracle\product\10.2.0\server\NETWORK\ADMIN
Connection from Oracle Database XE to third party databases via the ODBC heterogeneous services should be possible as well, but I will need to download a 3rd party product to test it. Will do so later. In the meantime, here is a link to some doc that may help you test the setup yourself - http://download-west.oracle.com/docs/cd/B19306_01/server.102/b14232/admin.htm#i1007209

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5 execute a select
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select * from dual@XYZ
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Heterogeneous Connectivity

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| Connected! |
| |
| sql-statement |
| help [tablename] |
| quit |
| |
Please help where I'm wrong? :(
odbc.ini_
[ODBC Data Sources]
postgresql = PostgreSQL ODBC Driver
[postgresql]
Description = Test to Postgres
Driver = PostgreSQL
Trace = Yes
TraceFile = /tmp/sql.log
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Servername = xxx
UserName = postgres
Password = xxx
Port = 5432
Protocol = 6.4
ReadOnly = Yes
RowVersioning = No
ShowSystemTables = No
ShowOidColumn = No
FakeOidIndex = No
DSN=postgresql
[Default]
Driver = PostgreSQL
Description = PostgreSQL Data Source
Server = xxx
Port = 5432
UserName = postgres
Password = xxx
;Socket = 4096
;end odbc.ini
odbcinst.ini_
# Example driver definitions
# Driver from the postgresql-odbc package
# Setup from the unixODBC package
[PostgreSQL]
Description     = ODBC for PostgreSQL
Driver          = /usr/lib/psqlodbc.so
Setup          = /usr/lib/libodbcpsqlS.so
Driver64     = /usr/lib64/psqlodbc.so
Setup64          = /usr/lib64/libodbcpsqlS.so
FileUsage     = 1
# Driver from the mysql-connector-odbc package
# Setup from the unixODBC package
[MySQL]
Description     = ODBC for MySQL
Driver          = /usr/lib/libmyodbc5.so
Setup          = /usr/lib/libodbcmyS.so
Driver64     = /usr/lib64/libmyodbc5.so
Setup64          = /usr/lib64/libodbcmyS.so
FileUsage     = 1
hs/admin/initpostgresql.ora_
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ADR_BASE_LISTENER = /home/splash/oracle
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(SID_LIST =
(SID_DESC=
(SID_NAME=postgresql)
(PROGRAM=dg4odbc)
(ORACLE_HOME=/home/splash/oracle/product/11.2.0/dbhome_4)
(ENVS=LD_LIBRARY_PATH=/usr/lib64:/home/splash/oracle/product/11.2.0/dbhome_4/lib)
tnsnames.ora_
ORCLDOCS =
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(CONNECT_DATA =
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(CONNECT_DATA = (SID = postgresql))
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I have enabled
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(4294842112) [28-NOV-2011 16:37:35:650] nscall: error exit
(4294842112) [28-NOV-2011 16:37:35:650] nioqper: error from nscall
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(4294842112) [28-NOV-2011 16:37:35:650] nioqper: ns (2) err code: 12560
(4294842112) [28-NOV-2011 16:37:35:650] nioqper: nt main err code: 507
(4294842112) [28-NOV-2011 16:37:35:650] nioqper: nt (2) err code: 0
(4294842112) [28-NOV-2011 16:37:35:650] nioqper: nt OS err code: 0
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(4294842112) [28-NOV-2011 16:37:35:650] niqme: entry
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Create database link from oracle DB to MySql database using dg4odbc

Hi All
we need to fetch a data of MySQL database from oracle database using dg4odbc connection.
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hi
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wojpik wrote:
hello
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best regards
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Please Help.
Thanks.

SELECT
a."EmpID" as "Employee ID",
a."EmpStatus" "Employee Status"
b."EmpSub" as "Employee Subjects"
FROM
[email protected] a
left outer join [email protected] b on a."EmpID" = b."suEmpID"
ORDER BY a."EmpID";
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/queries006.htm#sthref3175
From your description, it appears you may need a right outer join. You want to get back all the rows from 'B', not from 'A'. Try a right join and let us know.

ODBC from Oracle to an other Database (Postgresql)

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