// Next.js API route support: https://nextjs.org/docs/api-routes/introduction import { OkPacket, QueryError, RowDataPacket } from "mysql2"; const pool = require("../../server/db/connect"); const queryString = "SELECT products.id, products.title, description, type_pizza.img_trad, type_pizza.heft_trad FROM products, type_pizza WHERE products.status=1 and products.type='pizza' and type_pizza.id_products=products.id and type_pizza.size=40"; export default function Handler() { pool.getConnection(function(err, conn) { // Do something with the connection conn.query(queryString , function(err, rows, fields) { console.log(); }); // Don't forget to release the connection when finished! pool.releaseConnection(conn); }) }