Thanks for your reply. In our platform users can choose there own way to data table let's say user A has 1234 columns then user B has 1245 columns so as the data is not in a structured way I thought like sql may not be helpful.

Thanks a lot for giving time to answer me and thanks for that lots of information. My app will be handling large amount of data as users adds on. DB should be able to handle the large data. I found that sql type data is not suitable I just gave postgreSQL to check popularity. I tried rethinkDB and CouchDB both are easy but heard that rethinkDB has been closed. I haven't tried MongoDB. I'm sorry to tell you but I haven't found good docs to give it a start with nodeJS. Can you suggest me any so that I can give it a try. My another problem is how to setup them on server (*i'm not backend some other will be doing it just asking for idea) are they easy to setup.

HAhah

But can I install it on my server?

Thx for the reply. Can I print my desired section from complete html using this function. Can you plzzz give me a example of it.