Download Oracle Instant Client: https://www.oracle.com/database/technologies/instant-client/winx64-64-downloads.html
Unzip the file after download, then add the instant client folder to the system path.
To use the instant client to connect to Oracle database, you need to create a tnsnames.ora file, see this: https://docs.oracle.com/en/database/oracle/oracle-database/18/ntcli/specifying-connection-by-configuring-tnsnames.ora-file.html#GUID-D039649B-3A41-4BC8-BC29-EB1F9B0B6792