I'm using Sequelize for a express project I'm working on.  

In one query I want to retrieve a concatenated result of two columns.

Like:

```
SELECT first_name || ' ' || last_name AS full_name FROM table

```

I tried the following syntax and got an error

```
router.get('/persons', function(req, res, next) {
  models.Person.findAll({
    attributes: [models.sequelize.fn('CONCAT', 'first_name', 'last_name')]
  })
    .then(function(persons) {
      res.send(persons);
    });
});

```

The error message:

```
SELECT CONCAT('first_name', 'last_name') FROM `Persons` AS `Person`;
Possibly unhandled SequelizeDatabaseError: Error: SQLITE_ERROR: no such function: CONCAT

```