Thanks Lars. :) I'll start lear about it.

A complete answer. Big thanks Kleo, your answer made me understand a little about the stack in javascript. and thanks for the correction. It's useful answer.

Hello all, big thanks for all the advices for me. Outstanding response to a newbie like me. Thanks.

thanks Lars, it's help me to choose what i need. :) MongoDB can handle database for commerce? or mongoDB just can handle application like real time chat?