How to use a Global database link

Question

i try to create a global database link through two databases MZFB et MZF14952.
the MZFB database is installed under the machine MZFXPDESK
the MZF14952 database is installed under another machine SUPPORT1
i execute this code
CREATE DATABASE LINK dbl_14952_5
CONNECT TO BELGA_5          
IDENTIFIED BY mypwd
USING 'MZFB'
select * from dba_db_links
OWNER      DB_LINK      USERNAME      HOST      CREATED
MZF14952     DBL_14952_5.CORP.MYCOMPANY.COM     BELGA_5          MZFB                    02/14/2007 14:17:21:000
select * from global_name
DBL_14952_1.CORP.MYCOMPANY.COM
select * from [email protected]
=> ORA-02019: connection description for remote database not found

Answer 1

zafadm,
as Leonardo pointed out you should refer to the db link by it's name - '@dbl_14952_5'. The USING clause expects a full address or an alias that refer's to your tnsnames.ora file on the local server (SUPPORT1) where an entry would exist with that alias. You can bypass the tnsnames.ora file by supplying the full address in your create database link statement, ie;
create database link dbl_14952_5
connect to  BELGA_5
identified by "password"
using '(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=host_ip)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=MZFB)))';Update the statement with the ip of the remote (MZFXPDESK) server.