Database Connection Prerequisites
Download and install a relevant version of Oracle Client or Oracle Instant Client and Visual C++ Redistributable Package to ensure instant connection to an Oracle database.
Conquest tool 64-bit + Windows OS 64-bit
64-bit client

Conquest tool 64-bit + Windows OS 64-bit
Conquest tool 32-bit + Windows OS 64-bit / 32-bit
32-bit client

Conquest tool 32-bit + Windows OS 64-bit / 32-bit
Use Instant Oracle Client as an alternative to Oracle Client.
Instant Oracle Client Connection
1. Choose Oracle Client depending on the version of your Conquest tool and Windows OS
64-bit client
64-bit client

Conquest tool 64-bit + Windows OS 64-bit
32-bit client
32-bit client

Conquest tool 32-bit + Windows OS 64-bit / 32-bit
2. Download and install a relevant version of the Microsoft Visual C ++ Redistributable Package for Visual Studio.
3. Create a folder, e.g. instantclient, and unzip the downloaded client into this folder.
4. Go to Control Panel > System > Enter the system environment variables.
5. On the Advanced tab, click the Environment Variables button.
6. Paste the path to the unzipped client next to the Path variable.

For a more detailed explanation, refer to the Oracle documentation.
Troubleshooting
Oracle Client does not work after installation
Check if the path to the installed client was placed correctly in the PATH environmental variable. For more information, refer to the Oracle documentation.
Unable to connect to a database after installing Oracle Client
Starting from version 11, Oracle Clients require the installation of the Microsoft Visual C ++ Redistributable Package for Visual Studio. Download and install the relevant version of the package.
Unable to connect to a database using Oracle Client 10g or earlier
Oracle Clients 10g or earlier are unable to connect to Oracle databases if the application is installed in a folder containing parentheses. Reinstall your Conquest application to a folder without parentheses in the path or install Oracle Client 11 or higher.
Helpful?