1. Get Oracle Database Details & Whitelist Retool IP Address
You can get your database connection details from whoever set up the database. You'll also need to get them to whitelist the Retool IP address.
2. Add to Retool
Create a new resource in Retool, and select "Oracle DB" as the type.
Enter your database connection details.
3. Create Queries
You can now select your newly-created Oracle DB resource from the Select Resource dropdown when creating queries in your Retool apps. You can toggle between SQL mode for raw SQL statements or the GUI mode for structured writes.
You can display the results of Oracle DB queries as with any other query in Retool: