README
¶
install mongo
path
Set a path environment variable pointing to the mongod program.
Some tutorials
https://www.tutorialspoint.com/mongodb/
data folder
Create a folder for data.
mac
windows
linux
run mongo
mongod
use terminal with mongo
mongo
stop
ctrl+c
exit
learn more about mongo
Mongo Commands
02_db
create
use <db name>
The above will use the database of the provided name if it exists, and create it if it doesn't
use
use <db name>
example
use temp
The above will use the database of the provided name if it exists, and create it if it doesn't
see current db
db
see all db
show dbs
You need to have at least one document in a db for it to be seen.
insert document
db.<collection name>.insert({"name":"McLeod"})
example
db.dogs.insert({"name":"toby"})
view documents
db.<collection name>.find()
example
db.cats.insert({"firstname":"coco"})
db.cats.find().pretty()
view collections
show collections
drop db
db.dropDatabase()
03_collection
collection commands
create implicitly
db.<collection name>.insert({"name":"McLeod"})
create explicitly
db.createCollection(<name>, {<optional options>})
optional options
| option | type | description |
|---|---|---|
| capped | bool | caps the size |
| size | number | sets size of cap in bytes |
| max | bool | maximum number of documents allowed in capped collection |
other options including validation
examples
db.createCollection("customers")
db.createCollection("crs",{capped:true, size:65536,max:1000000})
view collections
show collections
drop
db.<collection name>.drop()
04_document
insert
db.<collection name>.insert({document})
insert multiple
db.<collection name>.insert(< [{document}, {document}, ..., {document}] >)
pass in an array of documents
example
use playroom
db
show dbs
db.crayons.insert([
{
"hex": "#EFDECD",
"name": "Almond",
"rgb": "(239, 222, 205)"
},
{
"hex": "#CD9575",
"name": "Antique Brass",
"rgb": "(205, 149, 117)"
},
{
"hex": "#FDD9B5",
"name": "Apricot",
"rgb": "(253, 217, 181)"
},
{
"hex": "#78DBE2",
"name": "Aquamarine",
"rgb": "(120, 219, 226)"
},
{
"hex": "#87A96B",
"name": "Asparagus",
"rgb": "(135, 169, 107)"
},
{
"hex": "#FFA474",
"name": "Atomic Tangerine",
"rgb": "(255, 164, 116)"
},
{
"hex": "#FAE7B5",
"name": "Banana Mania",
"rgb": "(250, 231, 181)"
}
])
show collections
db.crayons.find()
db.crayons.drop()
db.dropDatabase()
05_query
setup
use store
db
show dbs
db.customers.insert([{"role":"double-zero","name": "Bond","age": 32},{"role":"citizen","name": "Moneypenny","age":32},{"role":"citizen","name": "Q","age":67},{"role":"citizen","name": "M","age":57},{"role":"citizen","name": "Dr. No","age":52}])
find
db.<collection name>.find()
db.customers.find()
find one
db.<collection name>.findOne()
db.customers.findOne()
find specific
db.customers.find({"name":"Bond"})
db.customers.find({name:"Bond"})
You can do it either way: "name" or name. JSON specification is to enclose name (object name-value pair) in double qoutes
and
db.customers.find({$and: [{name:"Bond"}, {age:32}]})
db.customers.find({$and: [{name:"Bond"}, {age:{$lt:20}}]})
db.customers.find({$and: [{name:"Bond"}, {age:{$gt:20}}]})
or
db.customers.find({$or: [{name:"Bond"}, {age:67}]})
db.customers.find({$or: [{name:"Bond"}, {age:{$lt:20}}]})
db.customers.find({$or: [{name:"Bond"}, {age:{$gt:32}}]})
and or
db.customers.find({role:"citizen"})
db.customers.find({age:52})
db.customers.find({$and: [{role:"citizen"}, {age:52}]})
db.customers.find({$or: [{role:"citizen"}, {age:52}]})
db.customers.find({$or: [{role:"citizen"}, {age:52}, {name:"Bond"}]})
db.customers.find({$or:[
{ $and : [ { role : "citizen" }, { age : 32 } ] },
{ $and : [ { role : "citizen" }, { age : 67 } ] }
]})
regex
db.customers.find({name: {$regex: '^M'}})
pretty
db.<collection name>.find().pretty()
pretty prints the results
operators
| operator | syntax | example |
|---|---|---|
| equality | {key:value} | db.customers.find({"name":"Bond"}).pretty() |
| less than | {key:{$lt:value}} | db.customers.find({"age":{$lt:20}}).pretty() |
| less than equals | {key:{$lte:value}} | db.customers.find({"age":{$lte:20}}).pretty() |
| greater than | {key:{$gt:value}} | db.customers.find({"age":{$gt:20}}).pretty() |
| greater than equals | {key:{$gte:value}} | db.customers.find({"age":{$gte:20}}).pretty() |
| not equals | {key:{$ne:value}} | db.customers.find({"age":{$ne:20}}).pretty() |
JSON reminder
JavaScript Object Notation (JSON) is a text format for the serialization of structured data.
It is derived from the object literals of JavaScript.
JSON can represent four primitive types (strings, numbers, booleans, and null) and two structured types (objects and arrays)
Primitive JSON
Here are four small JSON texts containing only values:
"Hello world!"
42
true
null
Object JSON
An object structure is represented as a pair of curly brackets surrounding zero or more name-value pairs (or members).
An object is an unordered collection of zero or more name:value pairs
A name is a string
A value is a string, number, boolean, null, object, or array.
Declare properties using name:value pairings separated by commas
Enclose names in curly braces
There is no trailing comma
This is a JSON object:
{
"Image": {
"Width": 800,
"Height": 600,
"Title": "View from 15th Floor",
"Thumbnail": {
"Url": "http://www.example.com/image/481989943",
"Height": 125,
"Width": 100
},
"Animated" : false,
"IDs": [116, 943, 234, 38793]
}
}
Array JSON
An array structure is represented as square brackets surrounding zero or more values (or elements).
Elements are separated by commas.
A value must be an
object
array
number
string
three literal names
true
false
null
This is a JSON array containing two objects:
[
{
"precision": "zip",
"Latitude": 37.7668,
"Longitude": -122.3959,
"Address": "",
"City": "SAN FRANCISCO",
"State": "CA",
"Zip": "94107",
"Country": "US"
},
{
"precision": "zip",
"Latitude": 37.371991,
"Longitude": -122.026020,
"Address": "",
"City": "SUNNYVALE",
"State": "CA",
"Zip": "94085",
"Country": "US"
}
]
Number
The representation of numbers is similar to that used in most programming languages. A number is represented in base 10 using decimal digits. It contains an integer component that may be prefixed with an optional minus sign, which may be followed by a fraction part and/or an exponent part. Leading zeros are not allowed. A fraction part is a decimal point followed by one or more digits.
String
The representation of strings is similar to conventions used in the C family of programming languages. A string begins and ends with double quotation marks.
source: The Internet Engineering Task Force (IETF)
06_update
update & save
update will update a record
save will overwrite a record
update
db.<collection mame>.update(<selection criteria>, <update data>, <optional options>)
example
db.customers.find()
gives this data
{ "_id" : ObjectId("5891221756867ebff44cc885"), "role" : "double-zero", "name" : "Bond", "age" : 32 }
{ "_id" : ObjectId("5891221756867ebff44cc886"), "role" : "citizen", "name" : "Moneypenny", "age" : 32 }
{ "_id" : ObjectId("5891221756867ebff44cc887"), "role" : "citizen", "name" : "Q", "age" : 67 }
{ "_id" : ObjectId("5891221756867ebff44cc888"), "role" : "citizen", "name" : "M", "age" : 57 }
{ "_id" : ObjectId("5891221756867ebff44cc889"), "role" : "citizen", "name" : "Dr. No", "age" : 52 }
update like this
db.customers.update({_id:ObjectId("5891221756867ebff44cc886")},{$set:{role:"double-zero"}})
db.customers.update({name:"Moneypenny"},{$set:{role:"double-zero"}})
db.customers.update({name:"Moneypenny"},{$set:{role:"citizen", name: "Miss Moneypenny"}})
db.customers.update({age:{$gt:35}},{$set:{role:"double-zero"}})
db.customers.update({age:{$gt:35}},{$set:{role:"double-zero"}}, {multi:true})
db.customers.update({},{$set:{role:"citizen"}}, {multi:true})
("5893888012acb8ada532a8e4"
save
db.customers.save({"role":"villain","name":"Jaws","age":43})
db.customers.save({"_id":ObjectId("5891221756867ebff44cc889"),"role":"villain","name":"Goldfinger","age":77})
db.customers.save({"_id":ObjectId("5893888012acb8ada532a8e4"),"role":"villain","name":"PussyGalore","age":31})
07_remove
db.<collection name>.remove(<selection criteria>)
db.customers.remove({role:"double-zero"})
db.customers.remove({role:"villain"})
removes all it matches
remove only 1
db.customers.remove({role:"citizen"},1)
remove
db.customers.remove({role:"citizen"})
put documents back
db.customers.insert([{"role":"double-zero","name": "Bond","age": 32},{"role":"citizen","name": "Moneypenny","age":32},{"role":"citizen","name": "Q","age":67},{"role":"citizen","name": "M","age":57},{"role":"citizen","name": "Dr. No","age":52}])
remove all
db.customers.remove({})
put documents back
db.customers.insert([{"role":"double-zero","name": "Bond","age": 32},{"role":"citizen","name": "Moneypenny","age":32},{"role":"citizen","name": "Q","age":67},{"role":"citizen","name": "M","age":57},{"role":"citizen","name": "Dr. No","age":52}])
08_projection
Retrieving part of a document; only some of the fields.
db.<collection name>.find(<selection criteria>,<list of fields with toggle 0 or 1>)
db.customers.find({},{_id:0,name:1,})
_id is displayed by default; turn off with 0
db.customers.find({},{_id:0,name:1,age:1})
db.customers.find({age:{$gt:32}},{_id:0,name:1,age:1})
09_limit
setup
db.crayons.insert([
{
"hex": "#EFDECD",
"name": "Almond",
"rgb": "(239, 222, 205)"
},
{
"hex": "#CD9575",
"name": "Antique Brass",
"rgb": "(205, 149, 117)"
},
{
"hex": "#FDD9B5",
"name": "Apricot",
"rgb": "(253, 217, 181)"
},
{
"hex": "#78DBE2",
"name": "Aquamarine",
"rgb": "(120, 219, 226)"
},
{
"hex": "#87A96B",
"name": "Asparagus",
"rgb": "(135, 169, 107)"
},
{
"hex": "#FFA474",
"name": "Atomic Tangerine",
"rgb": "(255, 164, 116)"
},
{
"hex": "#FAE7B5",
"name": "Banana Mania",
"rgb": "(250, 231, 181)"
}
])
limit
db.<collection name>.find(<selection criteria>).limit(n)
db.crayons.find().limit(3)
db.customers.find({age:{$gt:32}},{_id:0,name:1,age:1}).limit(2)
10_sort
Run setup below first
db.<collection name>.find().sort(<field to sort on>:<1 for ascend, -1 descend>)
db.oscars.find().limit(10)
db.oscars.find({},{_id:0,year:1,title:1}).limit(10)
db.oscars.find({},{_id:0,year:1,title:1}).limit(10).sort({title:1})
db.oscars.find({},{_id:0,year:1,title:1}).sort({title:1}).limit(10)
db.oscars.find({},{_id:0,year:1,title:1}).limit(10).sort({title:-1})
db.oscars.find({releaseYear:{$gt:1970}},{_id:0,year:1,title:1}).limit(10).sort({title:1})
db.oscars.find({releaseYear:{$gt:1980}},{_id:0,year:1,title:1})
setup
db.oscars.insert([
{ "year": "1927",
"title": "Wings",
"imdbId": "tt0018578",
"releaseDate": "1927-05-19T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1927,
"releaseMonth": 4,
"releaseDay": 19
},
{ "year": "1929",
"title": "The Broadway Melody",
"imdbId": "tt0019729",
"releaseDate": "1929-02-01T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1929,
"releaseMonth": 1,
"releaseDay": 1
},
{ "year": "1930",
"title": "All Quiet on the Western Front",
"imdbId": "tt0020629",
"releaseDate": "1930-04-21T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1930,
"releaseMonth": 3,
"releaseDay": 21
},
{ "year": "1931",
"title": "Cimarron",
"imdbId": "tt0021746",
"releaseDate": "1931-01-26T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1931,
"releaseMonth": 0,
"releaseDay": 26
},
{ "year": "1932",
"title": "Grand Hotel",
"imdbId": "tt0022958",
"releaseDate": "1932-04-12T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1932,
"releaseMonth": 3,
"releaseDay": 12
},
{ "year": "1933",
"title": "Cavalcade",
"imdbId": "tt0023876",
"releaseDate": "1933-01-05T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1933,
"releaseMonth": 0,
"releaseDay": 5
},
{ "year": "1934",
"title": "It Happened One Night",
"imdbId": "tt0025316",
"releaseDate": "1934-02-22T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1934,
"releaseMonth": 1,
"releaseDay": 22
},
{ "year": "1935",
"title": "Mutiny on the Bounty",
"imdbId": "tt0026752",
"releaseDate": "1935-11-08T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1935,
"releaseMonth": 10,
"releaseDay": 8
},
{ "year": "1936",
"title": "The Great Ziegfeld",
"imdbId": "tt0027698",
"releaseDate": "1936-03-22T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1936,
"releaseMonth": 2,
"releaseDay": 22
},
{ "year": "1937",
"title": "The Life of Emile Zola",
"imdbId": "tt0029146",
"releaseDate": "1937-08-11T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1937,
"releaseMonth": 7,
"releaseDay": 11
},
{ "year": "1938",
"title": "You Can't Take It with You",
"imdbId": "tt0030993",
"releaseDate": "1938-08-23T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1938,
"releaseMonth": 7,
"releaseDay": 23
},
{ "year": "1939",
"title": "Gone with the Wind",
"imdbId": "tt0031381",
"releaseDate": "1939-12-28T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1939,
"releaseMonth": 11,
"releaseDay": 28
},
{ "year": "1940",
"title": "Rebecca",
"imdbId": "tt0032976",
"releaseDate": "1940-03-27T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1940,
"releaseMonth": 2,
"releaseDay": 27
},
{ "year": "1941",
"title": "How Green Was My Valley",
"imdbId": "tt0033729",
"releaseDate": "1941-10-28T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1941,
"releaseMonth": 9,
"releaseDay": 28
},
{ "year": "1942",
"title": "Mrs. Miniver",
"imdbId": "tt0035093",
"releaseDate": "1942-07-22T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1942,
"releaseMonth": 6,
"releaseDay": 22
},
{ "year": "1943",
"title": "Casablanca",
"imdbId": "tt0034583",
"releaseDate": "1942-11-26T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1942,
"releaseMonth": 10,
"releaseDay": 26
},
{ "year": "1944",
"title": "Going My Way",
"imdbId": "tt0036872",
"releaseDate": "1944-08-16T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1944,
"releaseMonth": 7,
"releaseDay": 16
},
{ "year": "1945",
"title": "The Lost Weekend",
"imdbId": "tt0037884",
"releaseDate": "1945-11-29T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1945,
"releaseMonth": 10,
"releaseDay": 29
},
{ "year": "1946",
"title": "The Best Years of Our Lives",
"imdbId": "tt0036868",
"releaseDate": "1946-12-25T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1946,
"releaseMonth": 11,
"releaseDay": 25
},
{ "year": "1947",
"title": "Gentleman's Agreement",
"imdbId": "tt0039416",
"releaseDate": "1947-11-11T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1947,
"releaseMonth": 10,
"releaseDay": 11
},
{ "year": "1948",
"title": "Hamlet",
"imdbId": "tt0040416",
"releaseDate": "1948-10-27T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1948,
"releaseMonth": 9,
"releaseDay": 27
},
{ "year": "1949",
"title": "All the Kings Men",
"imdbId": "tt0041113",
"releaseDate": "1949-11-08T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1949,
"releaseMonth": 10,
"releaseDay": 8
},
{ "year": "1950",
"title": "All About Eve",
"imdbId": "tt0042192",
"releaseDate": "1950-10-13T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1950,
"releaseMonth": 9,
"releaseDay": 13
},
{ "year": "1951",
"title": "An American in Paris",
"imdbId": "tt0043278",
"releaseDate": "1951-10-04T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1951,
"releaseMonth": 9,
"releaseDay": 4
},
{ "year": "1952",
"title": "The Greatest Show on Earth",
"imdbId": "tt0044672",
"releaseDate": "1952-01-10T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1952,
"releaseMonth": 0,
"releaseDay": 10
},
{ "year": "1953",
"title": "From Here to Eternity",
"imdbId": "tt0045793",
"releaseDate": "1953-09-30T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1953,
"releaseMonth": 8,
"releaseDay": 30
},
{ "year": "1954",
"title": "On the Waterfront",
"imdbId": "tt0047296",
"releaseDate": "1954-07-28T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1954,
"releaseMonth": 6,
"releaseDay": 28
},
{ "year": "1955",
"title": "Marty",
"imdbId": "tt0048356",
"releaseDate": "1955-07-15T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1955,
"releaseMonth": 6,
"releaseDay": 15
},
{ "year": "1956",
"title": "Around the World in 80 Days",
"imdbId": "tt0048960",
"releaseDate": "1956-12-22T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1956,
"releaseMonth": 11,
"releaseDay": 22
},
{ "year": "1957",
"title": "The Bridge on the River Kwai",
"imdbId": "tt0050212",
"releaseDate": "1957-12-19T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1957,
"releaseMonth": 11,
"releaseDay": 19
},
{ "year": "1958",
"title": "Gigi",
"imdbId": "tt0051658",
"releaseDate": "1958-07-10T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1958,
"releaseMonth": 6,
"releaseDay": 10
},
{ "year": "1959",
"title": "Ben-Hur",
"imdbId": "tt0052618",
"releaseDate": "1959-11-18T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1959,
"releaseMonth": 10,
"releaseDay": 18
},
{ "year": "1960",
"title": "The Apartment",
"imdbId": "tt0053604",
"releaseDate": "1960-06-21T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1960,
"releaseMonth": 5,
"releaseDay": 21
},
{ "year": "1961",
"title": "West Side Story",
"imdbId": "tt0055614",
"releaseDate": "1961-12-13T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1961,
"releaseMonth": 11,
"releaseDay": 13
},
{ "year": "1962",
"title": "Lawrence of Arabia",
"imdbId": "tt0056172",
"releaseDate": "1962-12-21T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1962,
"releaseMonth": 11,
"releaseDay": 21
},
{ "year": "1963",
"title": "Tom Jones",
"imdbId": "tt0057590",
"releaseDate": "1963-10-24T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1963,
"releaseMonth": 9,
"releaseDay": 24
},
{ "year": "1964",
"title": "My Fair Lady",
"imdbId": "tt0058385",
"releaseDate": "1964-10-28T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1964,
"releaseMonth": 9,
"releaseDay": 28
},
{ "year": "1965",
"title": "The Sound of Music",
"imdbId": "tt0059742",
"releaseDate": "1965-03-10T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1965,
"releaseMonth": 2,
"releaseDay": 10
},
{ "year": "1966",
"title": "A Man for All Seasons",
"imdbId": "tt0060665",
"releaseDate": "1966-12-14T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1966,
"releaseMonth": 11,
"releaseDay": 14
},
{ "year": "1967",
"title": "In the Heat of the Night",
"imdbId": "tt0061811",
"releaseDate": "1967-08-23T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1967,
"releaseMonth": 7,
"releaseDay": 23
},
{ "year": "1968",
"title": "Oliver!",
"imdbId": "tt0063385",
"releaseDate": "1968-12-20T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1968,
"releaseMonth": 11,
"releaseDay": 20
},
{ "year": "1969",
"title": "Midnight Cowboy",
"imdbId": "tt0064665",
"releaseDate": "1969-05-25T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1969,
"releaseMonth": 4,
"releaseDay": 25
},
{ "year": "1970",
"title": "Patton",
"imdbId": "tt0066206",
"releaseDate": "1970-02-18T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1970,
"releaseMonth": 1,
"releaseDay": 18
},
{ "year": "1971",
"title": "The French Connection",
"imdbId": "tt0067116",
"releaseDate": "1971-10-07T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1971,
"releaseMonth": 9,
"releaseDay": 7
},
{ "year": "1972",
"title": "The Godfather",
"imdbId": "tt0068646",
"releaseDate": "1972-03-22T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1972,
"releaseMonth": 2,
"releaseDay": 22
},
{ "year": "1973",
"title": "The Sting",
"imdbId": "tt0070735",
"releaseDate": "1973-12-25T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1973,
"releaseMonth": 11,
"releaseDay": 25
},
{ "year": "1974",
"title": "The Godfather Part II",
"imdbId": "tt0071562",
"releaseDate": "1974-12-18T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1974,
"releaseMonth": 11,
"releaseDay": 18
},
{ "year": "1975",
"title": "One Flew over the Cuckoo's Nest",
"imdbId": "tt0073486",
"releaseDate": "1975-11-19T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1975,
"releaseMonth": 10,
"releaseDay": 19
},
{ "year": "1976",
"title": "Rocky",
"imdbId": "tt0075148",
"releaseDate": "1976-11-21T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1976,
"releaseMonth": 10,
"releaseDay": 21
},
{ "year": "1977",
"title": "Annie Hall",
"imdbId": "tt0075686",
"releaseDate": "1977-04-20T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1977,
"releaseMonth": 3,
"releaseDay": 20
},
{ "year": "1978",
"title": "The Deer Hunter",
"imdbId": "tt0077416",
"releaseDate": "1978-12-08T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1978,
"releaseMonth": 11,
"releaseDay": 8
},
{ "year": "1979",
"title": "Kramer vs. Kramer",
"imdbId": "tt0079417",
"releaseDate": "1979-12-19T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1979,
"releaseMonth": 11,
"releaseDay": 19
},
{ "year": "1980",
"title": "Ordinary People",
"imdbId": "tt0081283",
"releaseDate": "1980-09-26T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1980,
"releaseMonth": 8,
"releaseDay": 26
},
{ "year": "1981",
"title": "Chariots of Fire",
"imdbId": "tt0082158",
"releaseDate": "1981-10-09T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1981,
"releaseMonth": 9,
"releaseDay": 9
},
{ "year": "1982",
"title": "Gandhi",
"imdbId": "tt0083987",
"releaseDate": "1982-12-07T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1982,
"releaseMonth": 11,
"releaseDay": 7
},
{ "year": "1983",
"title": "Terms of Endearment",
"imdbId": "tt0086425",
"releaseDate": "1983-11-20T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1983,
"releaseMonth": 10,
"releaseDay": 20
},
{ "year": "1984",
"title": "Amadeus",
"imdbId": "tt0086879",
"releaseDate": "1984-09-06T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1984,
"releaseMonth": 8,
"releaseDay": 6
},
{ "year": "1985",
"title": "Out of Africa",
"imdbId": "tt0089755",
"releaseDate": "1985-12-10T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1985,
"releaseMonth": 11,
"releaseDay": 10
},
{ "year": "1986",
"title": "Platoon",
"imdbId": "tt0091763",
"releaseDate": "1986-12-19T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1986,
"releaseMonth": 11,
"releaseDay": 19
},
{ "year": "1987",
"title": "The Last Emperor",
"imdbId": "tt0093389",
"releaseDate": "1987-11-19T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1987,
"releaseMonth": 10,
"releaseDay": 19
},
{ "year": "1988",
"title": "Rain Man",
"imdbId": "tt0095953",
"releaseDate": "1988-12-14T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1988,
"releaseMonth": 11,
"releaseDay": 14
},
{ "year": "1989",
"title": "Driving Miss Daisy",
"imdbId": "tt0097239",
"releaseDate": "1989-12-15T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1989,
"releaseMonth": 11,
"releaseDay": 15
},
{ "year": "1990",
"title": "Dances With Wolves",
"imdbId": "tt0099348",
"releaseDate": "1990-10-19T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1990,
"releaseMonth": 9,
"releaseDay": 19
},
{ "year": "1991",
"title": "The Silence of the Lambs",
"imdbId": "tt0102926",
"releaseDate": "1991-01-30T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1991,
"releaseMonth": 0,
"releaseDay": 30
},
{ "year": "1992",
"title": "Unforgiven",
"imdbId": "tt0105695",
"releaseDate": "1992-08-03T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1992,
"releaseMonth": 7,
"releaseDay": 3
},
{ "year": "1993",
"title": "Schindler's List",
"imdbId": "tt0108052",
"releaseDate": "1993-11-30T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1993,
"releaseMonth": 10,
"releaseDay": 30
},
{ "year": "1994",
"title": "Forrest Gump",
"imdbId": "tt0109830",
"releaseDate": "1994-06-23T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1994,
"releaseMonth": 5,
"releaseDay": 23
},
{ "year": "1995",
"title": "Braveheart",
"imdbId": "tt0112573",
"releaseDate": "1995-05-19T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1995,
"releaseMonth": 4,
"releaseDay": 19
},
{ "year": "1996",
"title": "The English Patient",
"imdbId": "tt0116209",
"releaseDate": "1996-11-12T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1996,
"releaseMonth": 10,
"releaseDay": 12
},
{ "year": "1997",
"title": "Titanic",
"imdbId": "tt0120338",
"releaseDate": "1997-12-14T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1997,
"releaseMonth": 11,
"releaseDay": 14
},
{ "year": "1998",
"title": "Shakespeare in Love",
"imdbId": "tt0138097",
"releaseDate": "1998-12-08T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1998,
"releaseMonth": 11,
"releaseDay": 8
},
{ "year": "1999",
"title": "American Beauty",
"imdbId": "tt0169547",
"releaseDate": "1999-09-08T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 1999,
"releaseMonth": 8,
"releaseDay": 8
},
{ "year": "2000",
"title": "Gladiator",
"imdbId": "tt0172495",
"releaseDate": "2000-05-01T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2000,
"releaseMonth": 4,
"releaseDay": 1
},
{ "year": "2001",
"title": "A Beautiful Mind",
"imdbId": "tt0268978",
"releaseDate": "2001-12-13T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2001,
"releaseMonth": 11,
"releaseDay": 13
},
{ "year": "2002",
"title": "Chicago",
"imdbId": "tt0299658",
"releaseDate": "2002-12-18T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2002,
"releaseMonth": 11,
"releaseDay": 18
},
{ "year": "2003",
"title": "The Lord of the Rings: The Return of the King",
"imdbId": "tt0167260",
"releaseDate": "2003-12-17T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2003,
"releaseMonth": 11,
"releaseDay": 17
},
{ "year": "2004",
"title": "Million Dollar Baby",
"imdbId": "tt0405159",
"releaseDate": "2004-12-15T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2004,
"releaseMonth": 11,
"releaseDay": 15
},
{ "year": "2005",
"title": "Crash",
"imdbId": "tt0375679",
"releaseDate": "2005-04-26T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2005,
"releaseMonth": 3,
"releaseDay": 26
},
{ "year": "2006",
"title": "The Departed",
"imdbId": "tt0407887",
"releaseDate": "2006-09-26T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2006,
"releaseMonth": 8,
"releaseDay": 26
},
{ "year": "2007",
"title": "No Country for Old Men",
"imdbId": "tt0477348",
"releaseDate": "2007-11-04T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2007,
"releaseMonth": 10,
"releaseDay": 4
},
{ "year": "2008",
"title": "Slumdog Millionaire",
"imdbId": "tt1010048",
"releaseDate": "2008-11-12T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2008,
"releaseMonth": 10,
"releaseDay": 12
},
{ "year": "2009",
"title": "The Hurt Locker",
"imdbId": "tt1655246",
"releaseDate": "2009-01-29T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2009,
"releaseMonth": 0,
"releaseDay": 29
},
{ "year": "2010",
"title": "The King's Speech",
"imdbId": "tt1504320",
"releaseDate": "2010-12-24T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2010,
"releaseMonth": 11,
"releaseDay": 24
},
{ "year": "2011",
"title": "The Artist",
"imdbId": "tt1655442",
"releaseDate": "2011-11-23T05:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2011,
"releaseMonth": 10,
"releaseDay": 23
},
{ "year": "2012",
"title": "Argo",
"imdbId": "tt1024648",
"releaseDate": "2012-10-04T04:00:00.000Z",
"releaseCountry": "USA",
"releaseYear": 2012,
"releaseMonth": 9,
"releaseDay": 4
}])
11_index
db.<collection name>.createIndex({<field to index>:<1 for ascend, -1 descend>})
create index
db.oscars.createIndex({title:1})
see indexes
db.oscars.getIndexes()
learn to create a unique index and more
12_aggregate
Aggregations operations process data records and return computed results. Aggregation operations group values from multiple documents together, and can perform a variety of operations on the grouped data to return a single result. MongoDB provides three ways to perform aggregation: the aggregation pipeline, the map-reduce function, and single purpose aggregation methods.
documenation about aggregation
single purpose aggregation
documenation about single purpose aggregation
There are two functions you can use:
db.collection.count()
db.collection.distinct()
db.collection.distinct(field, query, options)
| Parameter | Description |
|---|---|
| field | The field for which to return distinct values. |
| query | A query that specifies the documents from which to retrieve the distinct values. |
| options | Optional. A document that specifies the options. See Options. |
examples - count()
db.oscars.count()
db.oscars.find().count()
db.customers.find({role:"citizen"}).count()
db.customers.find({$or: [{name:"Bond"}, {age:{$gt:32}}]}).count()
examples - distinct() - setup
db.inventory.insert([
{ "_id": 1, "dept": "A", "item": { "sku": "111", "color": "red" }, "sizes": [ "S", "M" ] },
{ "_id": 2, "dept": "A", "item": { "sku": "111", "color": "blue" }, "sizes": [ "M", "L" ] },
{ "_id": 3, "dept": "B", "item": { "sku": "222", "color": "blue" }, "sizes": "S" },
{ "_id": 4, "dept": "A", "item": { "sku": "333", "color": "black" }, "sizes": [ "S" ] }
])
examples - distinct()
db.inventory.distinct( "dept" )
db.inventory.distinct( "item.sku" )
db.inventory.distinct( "sizes" )
aggregation pipeline
db.<collection name>.aggregate([{<match, sort, geoNear>},{<group>}])
MongoDB’s aggregation framework is modeled on the concept of data processing pipelines. Documents enter a multi-stage pipeline that transforms the documents into an aggregated result.
The most basic pipeline stages provide filters that operate like queries and document transformations that modify the form of the output document.
Other pipeline operations provide tools for grouping and sorting documents by specific field or fields as well as tools for aggregating the contents of arrays, including arrays of documents. In addition, pipeline stages can use operators for tasks such as calculating the average or concatenating a string.
The pipeline provides efficient data aggregation using native operations within MongoDB, and is the preferred method for data aggregation in MongoDB.
example - setup
db.orders.insert([
{"cust_id":"A123","amount":500,"status":"A"},
{"cust_id":"A123","amount":250,"status":"A"},
{"cust_id":"B212","amount":200,"status":"A"},
{"cust_id":"A123","amount":300,"status":"D"}
])
example
db.orders.aggregate([
{$match:{status:"A"}},
{$group:{_id: "$cust_id",total: {$sum:"$amount"}}}
])
14_users
locking down your database
create admin super user
use admin
db.createUser(
{
user: "jamesbond",
pwd: "moneypennyrocks007sworld",
roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
}
)
exit mongo & then start again
mongod --auth
mongo -u "jamesbond" -p "moneypennyrocks007sworld" --authenticationDatabase "admin"
see current user
db.runCommand({connectionStatus : 1})
create regular user
Give this user readwrite permissions on the store db.
db.createUser(
{
user: "bond",
pwd: "moneypenny007",
roles: [ { role: "readWrite", db: "store" } ]
}
)
exit mongo & then start again
mongod --auth
mongo -u "bond" -p "moneypenny007" --authenticationDatabase "store"
see current user
db.runCommand({connectionStatus : 1})
lock down the database
exit mongo & then start again with auth enabled
mongod --auth
mongo -u "bond" -p "moneypenny007" --authenticationDatabase "store"
test
use store
show collections
db.customers.find()
db.customers.insert({"role" : "double-zero", "name" : "Elon Musk", "age" : 47 })
test
launch a new terminal window
mongo
should be unauthorized:
show collections
drop user
db.dropUser("<user name>")
Directories
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