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Neo4j
Tabriz Software Open Talks
#opentalks
@silverman2OOO9
2015-10-29 / 1394-08-07
Farzin Bagheri
Table of Contents
Database
Relational Databases
NOSQL
● NOSQL Categories
Neo4j● Cypher● Example● Usage
Database
Relational Database
● Relational Database : SQL Server , MySQL , Oracle,...● Concepts : Table , Row, Column,…
But,is it enough?
No !
Why?
● Cost● Need Powerful hardware● Need Expert● Sometimes we need only some feature
NoSQL Databases
What is NoSQL ?
NoSQL
Not Only SQL
4 Type of NoSQL Databases :
● Key-Value : ○ Data mode : Key and value! for example : Set A 20○ Example : Redis , Riak , Dynamodb (Amazon) ,...○ Use Case : Task Queue (Celery) , Cashing ,...
● Document : ○ Data model : collection of Key - value : { FName : “Farzin” , LName : ”Bagheri” , City : “Khoy” }
○ Example : MongoDB , couchDB○ Use Case : Inserting a Log Record (Nginx or Apache)
● Column Family or BigTable : ○ Data model : big table! each rows has their own Schema.○ Example : Hbase , Cassandra○ Use Case : like Relational Databases but more flexible
● Graph Databases ○ Data mode : Node (Vertices) , Relationship (Edge) and Properties○ Example : Neo4j , OrientDB , ArangoDB ,... ○ Use Case : Social network , Recommendation , Graph-Based Search,...
4 Type of NoSQL Databases :
● Key-Value : ○ Data mode : Key and value! for example : Set A 20○ Example : Redis , Riak , Dynamodb (Amazon) ,...○ Use Case : Task Queue (Celery) , Cashing ,...
● Document : ○ Data model : collection of Key - value : { FName : “Farzin” , LName : ”Bagheri” , City : “Khoy” }
○ Example : MongoDB , couchDB○ Use Case : Inserting a Log Record (Nginx or Apache)
● Column Family or BigTable : ○ Data model : big table! each rows has their own Schema.○ Example : Hbase , Cassandra○ Use Case : like Relational Databases but more flexible
● Graph Databases ○ Data mode : Node (Vertices) , Relationship (Edge) and Properties○ Example : Neo4j , OrientDB , ArangoDB ,... ○ Use Case : Social network , Recommendation , Graph-Based Search,...
4 Type of NoSQL Databases :
● Key-Value : ○ Data mode : Key and value! for example : Set A 20○ Example : Redis , Riak , Dynamodb (Amazon) ,...○ Use Case : Task Queue (Celery) , Cashing ,...
● Document : ○ Data model : collection of Key - value : { FName : “Farzin” , LName : ”Bagheri” , City : “Khoy” }
○ Example : MongoDB , couchDB○ Use Case : Inserting a Log Record (Nginx or Apache)
● Column Family or BigTable : ○ Data model : big table! each rows has their own Schema.○ Example : Hbase , Cassandra○ Use Case : like Relational Databases but more flexible
● Graph Databases○ Data mode : Node (Vertices) , Relationship (Edge) and Properties○ Example : Neo4j , OrientDB , ArangoDB ,... ○ Use Case : Social network , Recommendation , Graph-Based Search,...
4 Type of NoSQL Databases :
● Key-Value : ○ Data mode : Key and value! for example : Set A 20○ Example : Redis , Riak , Dynamodb (Amazon) ,...○ Use Case : Task Queue (Celery) , Cashing ,...
● Document : ○ Data model : collection of Key - value : { FName : “Farzin” , LName : ”Bagheri” , City : “Khoy” }
○ Example : MongoDB , couchDB○ Use Case : Inserting a Log Record (Nginx or Apache)
● Column Family or BigTable : ○ Data model : big table! each rows has their own Schema.○ Example : Hbase , Cassandra○ Use Case : like Relational Databases but more flexible
● Graph Databases○ Data mode : Node (Vertices) , Relationship (Edge) and Properties○ Example : Neo4j , OrientDB , ArangoDB ,... ○ Use Case : Social network , Recommendation , Graph-Based Search,...
Graph are everywhere
Graph
● Nodes● Relationships● Properties
http://neo4j.com/developer/graph-database/
How to talk to Neo4j?
Cypher
Cypher
Creating Node
Getting
CREATE ( : Person { Fname : "Farzin" , Lname : "Bagheri" } )
Creating other Nodes
CREATE ( :Person { Fname : "Arash" , Lname : "Milani" } ) ,
( :Person { Fname : "Masoud" , Lname : "Sadri" } )
Getting All
Going to be Social ! :)
Creating Relationship :
Small Social Network :
Finding Friend and Friend of Friend :
● Friend of Someone :
Finding Friend and Friend of Friend :
● Friend of Friend of Someone :
● Other way :
Finding All :
Cloud
(app) -[:depend_on]-> (os) - [:depend_on] -> (VM) -[:depend_on] >(Server)-[::depend_on] -> (Power)
Dependency Chain :
Which Server Host App1?
App1 Dependency :
Most Dependent :
Recommendation
MATCH ( p:person { name:"B" } ) -[ :Has ]-> ( o1:Order )-[ :include ]->( b:Book )
<-[ :include ] - ( o2:Order )
-[:include]-> ( otherBook )
where not o1-[:include]->(otherBook)
return distinct ( otherBook.name)
Performance
Usage
● Social network● Network Analysis● Recommendation systems● Fraud Detection
● Path Finding (Shortest path , simple path ,...)● Digital Marketing
Database Popularity Change
Neo4j in Iran & World
Thank you
References
● www.db-engines.com● www.neo4j.com● www.linkedin.com● Graph Database , Ian Robinson , Jim Webber & Emil Eifrem
