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%;<path to OPatch directory in client home, e.g., C:\oracle\product\10.2.0\client_1\OPatch>
c:\>set ORACLE_HOME=<oracle home directory of client, e.g., C:\Oracle\product\10.2.0\client_1>
c:\>opatch lsinventory

This gives you the overall version of the client installed.

Answer 2

In Windows -> use Command Promt:

tnsping localhost

It show the version and if is installed 32 o 64 bit client, for example:

TNS Ping Utility for 64-bit Windows: Version 10.2.0.4.0 - Production on 03-MAR-2015 16:47:26

Source: https://decipherinfosys.wordpress.com/2007/02/10/checking-for-oracle-client-version-on-windows/