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5881725
MongoDB Notes
Description
596 Management Information Systems (Data Technologies) Mind Map on MongoDB Notes, created by Callie Toothman on 14/07/2016.
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mongodb
management information systems
data technologies
596
Mind Map by
Callie Toothman
, updated more than 1 year ago
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Created by
Callie Toothman
over 8 years ago
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Resource summary
MongoDB Notes
Schema-Free
Hierarchy
Instance
Database
Collection
Document
Every Document has an id
JSON Format
Embedded
Attributes are not stored in separate collection
Implementation depends on the needs of the application
Linked
Optimized to quickly retrieve relevant data
Design should take into account how the application needs the data
Documentation: https://docs.mongodb.com/manual/
Extensions
Mongoose
RoboMongo
MongoChef
CRUD Operations
find
Equivalent to SELECT statement
Examples
Minimal
db.Products.find()
Query + Projection
db.Products.find({ "desc": "42in TV", "width": 41 })
Query Only
db.Products.find({"desc": "42in TV"})
Projection Only
db.Products.find({"width": 1, "height": 1, "depth": 1} )
Arrays
db.Products.find({ "priceHist" : {$elemMatch: { $gt: 100, $lt: 300 } } })
Conditional Statements
db.Products.find({"reviews.star": { $gte: 4 } })
Embedded Collections
db.Products.find({"editorReview.authorlname" : "Smith"} )
Syntax
db.collection.find(query, projection)
Projection: Which columns you're going to return
id always comes back unless id is set to false {id: 0}
Inserts
Examples
Single
db.Questions.insert({"_id": NumberInt(5), "prodID": NumberInt(4), "author": "MrsInquisitive", "text": "Sample question"})
Multiple
db.Questions.insert([{"_id": NumberInt(6), "prodID": NumberInt(4), "author": "MrsInquisitive", "text": "Sample question"}, {"_id": NumberInt(7), "prodID": NumberInt(4), "author": "MrIWantToKnow", "text": "Sample question"} ])
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