If you get sqlplus is not recognized , you downloaded the Basic package (which lacks SQL*Plus). Download the instantclient-sqlplus package and extract it into the same folder. Retry.
The Instant Client is a lightweight, free set of libraries (DLLs) that provides the necessary network connectivity. It requires no installation (just unzip) and no configuration. oracle client download for windows
To download Oracle Client software, follow these steps: If you get sqlplus is not recognized ,
Scroll down further and download the additional package: instantclient-odbc-windows.x64-21.13.0.0.0dbru.zip oracle client download for windows