I installed MySQL on Microsoft Windows 8 Using a noinstall Zip Archive. But when i tested by executing the following commands on windows prompt, the above error showed up.<
Well that could have some reasons.
THe first one is that the MySQL server/service not started.
If he is started you should check out the logfiles, and make sure there are no problems.
You could also uninstall the MySQL service and install XAMPP. With XAMPP it is easier to manage this services.