const queryBuilder = require("@iamthes/query-builder");
const q = queryBuilder.create("mysql");
var sql = q()
    .select("*")
    .from("user")
    .where("id", 5)
    .get(); // select * from user where id = 5

const queryBuilder = require("@iamthes/query-builder");
const Builder = queryBuilder.mysql;
const b = new Builder();
var sql = b
    .select("count", "*", "total")
    .from("user")
    .get(); // select count(*) as total from user

// Using same instance to build next query.
sql = b
    .select("job, salary")
    .from("user")
    .where("salary", "@null")
    .get(); // select job, salary from user where salary = null