// zadanie 1
db.klienci.find({eMail: {$regex:/^..[ap].*/, $options: 'i'}})
// zadanie 2
db.klienci.find({eMail: {$regex: /^.*o2.*/, $options: 'i'}}, {nrDowodu: 1})
//zadanie 3
db.pokoje.find({$and: [{dostawka: 'T'},
{$and: [{"cenaZaDostawke.cenaZaDobe": {$gt: 50}},
{"cenaZaDostawke.cenaZaDobe": {$lt: 80}}]
}]})
// zadanie 4
db.pokoje.find({pietro: 2}).limit(3)
//zadanie 5
db.pokoje.find({pietro: 2}).limit(4).skip(2)
//zadanie 6
db.pokoje.distinct("pietro")
//zadanie 7
db.pokoje.find({cenaZaDobe: {$lt: 200}}, {_id: 1, liczbaMiejsc: 1, cenaZaDobe: 1})
//zadanie 8
db.zakwaterowanie.find({dataZakwaterowania: new Date("2022-02-23T17:13:03Z") })
// zadanie 9
db.zakwaterowanie.find({$and: [{dataZakwaterowania: {$gt: new Date("2022-01-01T00:00:00Z")}}, {dataZakwaterowania: {$lt: new Date("2022-02-12T00:00:00Z")}}]})
// zadanie 10
// .1 ze cenaZaDostawke[1].cenaZaDobe = 100
db.pokoje.find({"cenaZaDostawke.1.cenaZaDobe": 100})
//zadanie 11
db.pokoje.find({$and: [{"cenaZaDostawke.0.cenaZaDobe": {$gt: 20}}, {"cenaZaDostawke.0.cenaZaDobe": {$lt: 80}}]})
//zadanie 12
db.pokoje.find({cenaZaDostawke: {$type: "array"}})
//zadanie 13
db.pokoje.find({liczbaMiejsc: {$mod: [2,0]}})
//zadanie 14
db.pokoje.find().min({cenaZaDobe: 400}).max({cenaZaDobe: 1000}).hint({cenaZaDobe: 1})
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}