How to install sqlldr.exe for Oracle bulkloading?

Download an Oracle client/driver that is compatible with your version of the Oracle database. For example Oracle Database 11g Release 2 Client (11.2.0.1.0) for Microsoft Windows (x64) is found on http://www.oracle.com/technetwork/database/enterprise-edition/downloads/112010-win64soft-094461.html.
After unzipping, double click on setup.exe
Select Administrator option for "What type of installation do you want ?"
Administrator option – Installs the management console, management tools, networking tools, utilities (including sqlldr.exe) and basic client software.

Double check that the installer has added the 'bin' folder that contains sqlldr.exe to your PATH environment variable.