Sequelize Query to find all records that falls in between date range

Try this condition what I think you are asking will do so.

For New Version Of Sequelize:

const where = {
    [Op.or]: [{
        from: {
            [Op.between]: [startDate, endDate]
        }
    }, {
        to: {
            [Op.between]: [startDate, endDate]
        }
    }]
};

OR as your code structure:

const where = {
    $or: [{
        from: {
            $between: [startDate, endDate]
        }
    }, {
        to: {
            $between: [startDate, endDate]
        }
    }]
};

For more info you can follow this Sequelize official documents

The solution which works for me is this:-

// here startDate and endDate are Date objects
const where = {
    from: {
        $between: [startDate, endDate]
    }
};

For reference to know more about operators:- http://docs.sequelizejs.com/en/latest/docs/querying/#operators

Note: In MYSQL between comparison operator is inclusive, which means it is equivalent to the expression (startDate <= from AND from <= endDate).