

kolekce vsech uzivatelu 18.5.2016
db.answers.aggregate([{$group: {_id: {user:"$user_id", condition:"$condition",ip:"$ip_id"}, count:{$sum:1}}},{$out:"users"}])

vytvorit index na answers na time
db.answers.createIndex({time:1})

kolekce vsech ip adres s poctem uzivatelu
db.users.aggregate([{$group:{_id:"$_id.ip",count:{$sum:1}}},{$out:"ips"}])