smart-tag/db/maxWagon.js

const con = require('./connect');

function maxWagon(collectionFk, callback) {
    let consSql = `SELECT MAX(tc.wagon) AS MaxWagons
                    FROM ticketCollection tc 
                    WHERE tc.collectionFk = ${collectionFk}`;
    con.con.query(consSql, function(err, result, fields) {
        callback(null, result);
    });
}

exports.maxWagon = maxWagon;