APEX for multiple databases

Question

Can I install APEX in one database and use it to connect and develop applications for other databases in network.

Answer 1

The two issues that I have run into with running an ApEx application in one database against data in another database is dealing with sequences and LOBs.
If you use a database link which does not specify a user name and password to get a sequence value from a remote database in an ApEx application you get the following type of error:
failed to parse SQL query:
ORA-01017: invalid username/password; logon denied
ORA-02063: preceding line from ...Since the sequence is stored in the other database and ApEx runs in the PL/SQL engine because of the engine's security, you have to use a database link with a user name and password in it like:
CREATE DATABASE LINK db_link CONNECT TO you_username IDENTIFIED BY your_password USING your_remote_db;
SELECT your_sequence.NEXTVAL@db_link FROM DUAL;Accessing LOB columns in your remote database cannot be done via a SELECT statement. You have to use an INSERT statement. I have my solution to this on my blog.
Mike