node.js Global connection already exists. Call sql.close() first

Question

I\'m trying to create web services using node.js from an sql server database,in the frontend when i call those 2 webservices simultaneously it throws an error Global connect

Answer 1

You have to create a poolConnection try this:

new sql.ConnectionPool(config).connect().then(pool => {

  return pool.request().query("SELECT * FROM MyTable")

  }).then(result => {

    let rows = result.recordset
    res.setHeader('Access-Control-Allow-Origin', '*')
    res.status(200).json(rows);
    sql.close();

  }).catch(err => {

    res.status(500).send({ message: `${err}`})
    sql.close();

  });