Approach to multiple MySQL queries with Node.js

I'm a newbie both on event/callback style programming and NodeJS. I'm trying to implement a little http server which serves ddbb data using node-mysql module.

My problems comes from queries structuration. Since there are often queries that require results from previous queries to run, I am not able to run all them simultaneously (asynchronously) and I am forced to wait some results.

My first approach was to run all the non-dependant queries at the same time and then loop until all of them have set a flag up saying I'm done so I can continue with the dependant (synchronized) ones, but I don't know if this is the correct approach.

Something like this:

function x(){
    var result_for_asynch_query_1 = null
    var result_for_asynch_query_2 = null

    mainLoop(){
        // call non-dependant query 1
        // call non-dependant query 2

        // loop until vars are != null

        // continue with queries that require data from the first ones
    }
}

//for each browser request
httpServer{
     call_to_x();
}.listen();

This way I can save some time in the final result since I don't wait all responses in a serial way but just to the longest one.

Is there a common way to do this? Any design pattern I'm not following?