JAVASCRIPT

sequelize.fn

// Counting number of totalPrice from column itemPrice table 
Model.findAll({
  attributes: {
    include: [
      [sequelize.fn('COUNT', sequelize.col('itemPrice')), 'totalPrice']
    ]
  }
});

sequelize.fn

// for gettting all username in uppercase 
instance.update({
  username: sequelize.fn('upper', sequelize.col('username'))
});