Error when i try to in stall mysql

I am new new to developer on rails. i have problem when i try to use
command “rails install mysql” it said like this picture.

Thanks you,

On windows I think you need to install the DevKit(, inside the devkit you will
instructions on how to patch your ruby installation to be able to
native extensions.

Also make sure you have mysql server installed.

My best,

2014-05-20 18:35 GMT-07:00 Duong vong veasna [email protected]: