node.js async/await using with MySQL

I need to get all results synchronized and append to a string with async/await keywords like c#

I am new to node.js and i can not adapt this new syntax to my code.

var string1;
var string2;
var string3;
var string4;

DatabasePool.getConnection(function(err, connection) {

        connection.query(query,function (err, result) {
            if (err){};
            string1 = result;
        });

        connection.query(query,function (err, result) {
            if (err){};
            string2 = result;
        });     

        connection.query(query,function (err, result) {
            if (err){};
            string2 = result;   
        });

        connection.query(query,function (err, result) {
            if (err){};
            string2 = result;
        }); 

       // i need to append all these strings to appended_text but  
       // all variables remain blank because below code runs first.
       var appended_text = string1 + string2 + string3 + string4;


});

via Burc Hasergin