Error while trying to access table using DB Link

Question

Hi All,
I had to access a table in another instance using a DB link. As there was no DB link, I was asked to create one and then access the table.
The below query was used to create DB link on my current instance FDEV:
CREATE PUBLIC DATABASE LINK to_link CONNECT TO apps IDENTIFIED BY appsdev USING 'ABCD';
The DB link gets created successfully and when I query select * from all_db_links on my current instance FDEV, I see the DB link name.
However, when I try to access the table, select * from x_stg@to_link on my current instance FDEV, this is resulting in an error as shown below:
ORA-01017: invalid username/password; logon denied
ORA-02063: preceding line from TO_LINK
The TNS entry looks something like this:
ABCD =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = abc.xx.com)(PORT = 1234))
(ADDRESS = (PROTOCOL = TCP)(HOST = abc.xyz.com)(PORT = 1234))
(CONNECT_DATA =
(SID = ABCD)
Can someone help me in this regard?
Thanks in Advance!!
Regards,
AB

Answer 1

You are trying to get 2 databases connected... so, you need to insure that FDEV can find and connect to ABCD.
So, from your FDEV database server, you can do 2 things (from command prompt):
1* tnsping ABCD (this will validate that the entry exists in your tnsnames.ora on your FDEV server, and that a valid listener can be found on remote server)
when above command succeeds:
2* sqlplus apps/appsdev@ABCD;
when you have established the connection, then you are SURE that your can connect ABCD database from FDEV database server. It will also validate the username / password combination, create session privilige, account not locked, etc.....
Please check the above, and post here the results.
HTH,
Thierry