Answer

• Download and Install the Oracle Instant Client
• Visit the Oracle Download page : https://www.oracle.com/database/technologies/instant-client/downloads.html
• Oracle provides a direct link to the latest Client : https://download.oracle.com/otn_software/nt/instantclient/instantclient-basic-windows.zip
• Create folder to store the Instant Client. E.g. C:\Oracle\, move and unzip the Instant Client Zip file to this folder E.g. C:\Oracle\instantclient_19_11
• Designate this folder as the “Oracle Home” folder and manually create the sub-folders (\network\admin) for Oracle to find the network connection information. The full path should be like C:\Oracle\instantclient_19_11\network\admin
• Set ORACLE_HOME environment variable to locate the necessary files used to make secure connections to the Oracle Cloud. At this point the Oracle Instant Client has been installed and the ORACLE_HOME environment variable has been set. 
• ORACLE_HOME: C:\Oracle\instantclient_19_11
• Test to make sure that your ORACLE_HOME environment variable is set correctly. Open up a CMD promt and issue the following command: echo %ORACLE_HOME%
• Login to Autonomous transaction Processing database and download the Wallet files. Move the Wallet ZIP file from your Downloads folder to the Oracle Instant Client Folder in the network/admin subfolder.
  • Unzip the Wallet Zip file into this same folder (C:\Oracle\instantclient_19_6\network\admin)
  • This will unpack important files such as:
    • tnsnames.ora 
    • sqlnet.ora
    • cwallet.sso
    • ewallet.p12
    • keystore.jks
    • truststore.jks
• Download Oracle driver. Since we are using the Oracle Cloud Wallet, all the files listed below is required and placed into C:/Program Files/Tableau/Drivers/
  • ojdbc8.jar
  • oraclepki.jar
  • osdt_cert.jar
  • osdt_core.jar
• Run Tableau Desktop and connect to Oracle by using the net_service_name defined in the tnsnames.ora.

Additional Information