MongoDB  Introduction, Installation & Execution
                      
MongoDB 
iFour Consultancy
Introduction, Installation & Execution
 
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What is MongoDB ?
Scalable High-Performance Open-source, Document-orientated 
database.
Built for Speed
Rich Document based queries for Easy readability. 
Full Index Support for High Performance. 
Replication and Failover for High Availability.
Auto Sharding for Easy Scalability. 
Map / Reduce for Aggregation.
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Why use MongoDB?
SQL was invented in the 70’s to store data.
MongoDB stores documents (or) objects.
Now-a-days, everyone works with objects (Python/Ruby/Java/etc.) 
And we need Databases to persist our objects. Then why not store 
objects directly ?
Embedded documents and arrays reduce need for joins. No Joins 
and No-multi document transactions.
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What is MongoDB great for?
RDBMS replacement for Web Applications.
Semi-structured Content Management.
Real-time Analytics & High-Speed Logging. 
Caching and High Scalability
Web 2.0, Media, SAAS, Gaming
HealthCare, Finance, Telecom, Government
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Not great for?
Highly Transactional Applications.
Problems requiring SQL.
Some Companies using MongoDB in 
Production
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Advantages of MongoDB
Schema less : Number of fields, content and size of the 
document can be differ from one document to another.
No complex joins
Data is stored as JSON style
Index on any attribute
Replication and High availability
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MongoDB Terminologies for RDBMS concepts
RDBMS MongoDB
Database Database
Table, View Collection
Row Document (JSON, BSON) 7
Column Field
Index Index
Join Embedded Document
Foreign Key Reference
Partition Shard
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JSON
“JavaScript Object Notation”
Easy for humans to write/read, easy for computers to 
parse/generate
Objects can be nested
Built on
• name/value pairs
• Ordered list of values
http://json.org/
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BSON
“Binary JSON”
Binary-encoded serialization of JSON-like docs
Embedded structure reduces need for joins
Goals
• Lightweight
• Traversable
• Efficient (decoding and encoding)
http://bsonspec.org/
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   BSON Example
{
"_id" : "37010"
“City" : “Nashik",
“Pin" :  423201,
"state" : “MH",
“Postman” : {
      name: “Ramesh Jadhav”
      address: “Panchavati”
   }
}
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Data Types of MongoDB
Integer 
Date Boolean 
Binary 
data Double 
Object ID String 
Null Arrays
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Data Types
String : This is most commonly used datatype to store the data. String in 
mongodb must be UTF-8 valid.
Integer : This type is used to store a numerical value. Integer can be 32 bit or 
64 bit depending upon your server. 
Boolean : This type is used to store a boolean (true/ false) value.
Double : This type is used to store floating point values.
Min/ Max keys : This type is used to compare a value against the lowest and 
highest BSON elements.
Arrays : This type is used to store arrays or list or multiple values into one key.
Timestamp : ctimestamp. This can be handy for recording when a document 
has been modified or added.
Object : This datatype is used for embedded documents.
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Data Types
Null : This type is used to store a Null value.
Symbol : This datatype is used identically to a string however, it's 
generally reserved for languages that use a specific symbol type.
Date : This datatype is used to store the current date or time in 
UNIX time format. You can specify your own date time by creating 
object of Date and passing day, month, year into it.
Object ID : This datatype is used to store the document’s ID.
Binary data : This datatype is used to store binay data.
Code : This datatype is used to store javascript code into document.
Regular expression : This datatype is used to store regular 
expression
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Installation in Windows
Download MongoDB from Website:
   https://www.mongodb.org/downloads
Select option
    Windows
Download and Run
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Starting MongoDB in Windows
Create one folder (eg  SNJB) in bin folder of MongoDB
Goto command prompt
Goto bin dir of MongoDB and write following command
mongod --storageEngine=mmapv1 --dbpath SNJB
 (Server will started and listen at 27017 port)
Open another command prompt and give command mongo
 (Client will be started)
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Installation in Ubuntu
Download MongoDB from Website:
   https://www.mongodb.org/downloads
Select option
    Linux
Download and Run
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Starting MongoDB in Ubuntu
Create a folder in bin directory of mongodb
Open terminal
Goto mongodb bin folder (cd mongo….)
Type  ./mongod  (Server is started)
Open another terminal
Goto mongodb bin folder (cd mongo….)
Type  ./mongo  (client will be started)
Run all commands on client terminal
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Outline
Difference Between SQL and NoSQL
Study of Open Source NOSQL 
Database
MongoDB Installation, 
Basic CRUD operations,
Execution
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Basic Database Operations
Database
collection
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Basic Database Operations- Database
use   ciommand
•
db To check currently selected database use the command db
show dbs • Displays the list of databases
db.dropDatabas • To Drop the database
e()
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Basic Database Operations- Collection
db.createCollection (name)
• To create collection
Ex:- db.createCollection(Stud)
• List out all names of collection in current 
>show collections database
db.databasename.insert • In mongodb you don't need to 
create collection. MongoDB 
({Key : Value}) creates collection automatically, 
Ex:- db.Stud.insert({{Name:”Jiya”}) when you insert some document.
db.collection.drop() • MongoDB's db.collection.drop() is used to 
Example:- 
drop a collection from the database.
db.Stud.drop()
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