Connection to SQL Server with Node.js doesn't work

Question

I have a big problem: I want to to connect to a MS SQL Server but whatever I am doing it doesn't work... I don't know where my mistake lies..

const parse = require("csv-parse/lib/sync");
const fs = require("fs");
const path = require("path");
var mssql = require('mssql/msnodesqlv8');
var iconv = require('iconv-lite');
var http = require('http');

// Connection to SSMS Database
var dbConfig = {
    host: 'localhost',
    user: 'user',
    server: 'server',
    database: 'database',
    options: {
        trustedConnection: true,
        useUTC: true
      }
};

var connection = new mssql.Connection(dbConfig, function(err) {
var request = new mssql.Request(connection);

...

 request.query(`INSERT INTO ${richtigername} (${namen}) VALUES (${values})`, function (err, recordset) {

                            if (err) {
                                console.log(err);

                                res.send(recordset)
                            } 

                            mssql.close();


                            });

Now there is the error message:

TypeError: request is not a function

It is so difficult to get data into a SQL Server database.. the tool works fine with MySQL but SQL Server is horrible..

I have two more queries before this with also: request.query(...) and if (err) { console.log(err); res.send(recordset) if (err) { console.log(err); res.send(recordset) ... MySQL is on the other hand so easy... only

connection.query(...) and before this

// Verbindung zur MySQL Datenbank
const connection = mysql.createConnection({
    host: 'localhost',
    user: 'root',
    password: 'password',
    database: 'database'
});

and

 // Verbindung zur Datenbank starten
    connection.connect((error) => {
        if (error) {
            console.error(error);
        } else {

        }

    }) 
}

Answer 1

It might be a type in your question, but it looks like you're missing a closing braces.

You have an open braces for this function

var connection = new mssql.Connection(dbConfig, function(err) {

But I don't see closing braces at the end.

Answer 2

First, assign a connection pool then use that to run your SQL. This example uses a stored procedure, but it is easily modified to run a query.

var express = require('express');
var app = express();

app.get('/', function (req, res) {

    var sql = require("mssql");

    // config for your database
    var config = {
        user: 'user',
        password: 'yourpassword',
        server: 'yourserver', 
        database: 'yourdb' 
    };

  new sql.ConnectionPool(config).connect().then(pool => {
    return pool.request()
      // for select query, uncomment .query and comment .input and .execute
      //.query("select * from table1 where id = 2")
      // for stored proc, comment .query and uncomment .input and .execute
      // .input is only needed if proc has params
      .input('p_id', sql.Int, 5)
      .execute('getData')
    }).then(result => {
      let rows = result.recordset
      res.setHeader('Access-Control-Allow-Origin', '*')
      res.status(200).json(rows);
      sql.close();
    }).catch(err => {
      console.log(err);
      res.status(500).send({ message: "${err}"})
      sql.close();
    });

  });

var server = app.listen(5000, function () {
    console.log('Server is running..');
});

Answer 3

why it is so difficult to run an easy query to SQL Sever.. There are so many different solutions.. I had try this:

   //Tabellen aus Datenbank anzeigen und speichern

    exports.tableNames = function (req, res) {

        sql.connect(config).then(function () {

            var sqlrequest = new sql.Request();

            sqlrequest.query('Select TABLE_NAME from TreasuryBI.INFORMATION_SCHEMA.tables').then(function (recordset) {
                console.dir(recordset);
                sql.close();
                return res.status(200).send(recordset);

            }).catch(function (err) {
                console.log(err);
            });
        });
    };

the problem is that I am unfortunately not a computer scientist or something.. Therefore, my knowledge is limited.. but I hope you could help me..

Best regards Frederic