What's the best way to determine which version of Oracle client I'm running?

Question

The subject says it all: What is the best way to determine the exact version of the oracle client I\'m running? Our clients are all running Windows.

I found one su

Answer 1

Run the installer, click "Installed Products...". This will give you a more detailed list of all installed components of the client install, e.g., drivers, SQL*Plus, etc.

Typical Oracle installations will store inventory information in C:\Program Files\Oracle\Inventory, but figuring out the installed versions isn't simply a matter of opening a text file.

This is AFAIK authoritative, and shows any patches that might have been applied as well (which running the utilities does not do).

EDIT: A CLI option would be to use the OPatch utility:

c:\> path=%path%;
c:\>set ORACLE_HOME=
c:\>opatch lsinventory

This gives you the overall version of the client installed.