how to query two different oracle database servers? - oracle

Question

How do I query two different Oracle database servers using a shell script?
How do I handle connecting to two different servers?
I have two different user ID and password.
I know this is not safe to include the id/pw in the shell script file but can you tell me how this is done?
server 1:
s1.mycompnay.com:1587/hr_dev.mycompany.com/HR_DB
server 1:
s2.mycompnay.com:1587/bank_dev.mycompany.com/BANK_DB
my shell script has something this:
sqlplus hr_db/$1 << EOF

Answer 1

You need to ensure that the path between the two servers is open and both servers have a registry in your tnsnames.ora file:
Using your description you would want two entries
HR_DB =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(Host = s1.mycompnay.com)(Port = 1587))
)
(CONNECT_DATA =
(SERVICE_NAME = HR_DB)
)
)
BANK_DB=
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(Host = s2.mycompnay.com)(Port = 1587))
)
(CONNECT_DATA =
(SERVICE_NAME = BANK_DB)
)
)
You already noted that it is bad practice to include the passwords in the script so I don't need to comment on that any further. After you get the entries in and have taken steps to ensure that firewalls are open you can test it by tnsping'ing the DBs:
tnsping HR_DB
tnsping BANK_DB
If those succeed it will tell you such as well as time in MS to return the packets. A failure will be immediately apparent.