mongodb filter multiple conditions code example

Example 1: mongodb aggregation $filter multiple conditions

cond: {
  $and: [
    { $gte: ['$$item.timestamp_start', fromTimestamp] },
    { $lt: ['$$item.timestamp_start', toTimestamp] }
  ]
}

Example 2: mongoose find multiple conditions

User.find({$or:[{region: "NA"},{sector:"Some Sector"}]}, function(err, user) 
 {
    if (err)
    {
        res.send(err);
    }
    console.log(user);
    res.json(user);

 });