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2 .`whoami`
{
name: “tim”,
lastname: “vaillancourt”,
employer: “percona”,
techs: [
“mongodb”,
“mysql”,
“cassandra”,
“redis”,
“rabbitmq”,
“solr”,
“kubernetes”,
“mesos”
“kafka”,
“couch*”,
“python”,
“golang”
]
}
6 .db.people.findOne()
{
"_id" : ObjectId("5bfd90b18791fb8236b8ab13"),
"name" : "Joseph",
"address_id" : ObjectId("5bfd90c58791fb8236b8ab14")
}
db.addresses.findOne()
{
"_id" : ObjectId("5bfd90c58791fb8236b8ab14"),
"Street" : "Street Name",
"number" : 100,
"zip" : "ASDFG"
}
7 .db.people.find().pretty()
{
"_id" : ObjectId("5bfd908a8791fb8236b8ab11"),
"name" : "Joseph",
"address" : {
"street" : "Street Name",
"number" : 100,
"zip" : "ASDFG"
}
}
12 .●
> db.foo.find({name : 'Joseph'})
●
> db.foo.find({name : 'Joseph'}, {name: 1})
13 .●
> db.foo.find({code : {$gte : 1, $lte: 10}})
> db.foo.find({code : {$in : [1,2,3,4,5,6,7,8,9,10]})
14 .●
> db.foo.find({address : {$exists : true})
15 .●
> db.foo.find({$and : [{name : 'Joseph'}, {address : {$exists : true}}])
> db.foo.find({name : 'Joseph', address : {$exists : true}})
16 .●
○
> db.foo.find({$or : [{code : 1}, {code : 2}])
> db.foo.find({code : {$in : [1,2]})
●
●
17 .●
> db.foo.find({name : /seph/})
●
> db.foo.find( { $text: { $search: "seph" } } )
18 .●
> db.foo.find({name : /seph/, address : {$exists: true}, age : {$gte :
30}})
21 . A-Z
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