pernilla.neo4j
DESCRIPTION
TRANSCRIPT
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A little talk about graph databases and
Neo4j
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A little talk about graph databases and
Neo4j
torsdag 17 oktober 13
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Pernilla Lindh
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Pernilla Lindh Started at Neo4j 2012
Developer Evangelist
Geek Girl Meetup Öresund, Sweden
My Blog: www.p3rnilla.com
Find me on Twitter: @p3rnilla
Email me: [email protected]
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Agenda:
Introduction
The fairytale about Neo4j- Johnny Depp, Cats, Earth, Napster, Friends, Customer, Application map
Graphs are everywhere- social, linked, interest graph
Graph Databases- What is it? My little pony’s, Matrix, Tom Hanks, Patterns, Movies, Query language
Surprise
DEMO
Become a graphista?
Thank you!
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Once upon a tim!..
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In " 90’s, #ree guys had a problem...
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In " 90’s, #ree guys had a problem...
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Between 3-8 000 language today
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2
1
StugaCottageIS_A
DEHaus
SEHusENGHouse
0
ENGBuilding
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#ey $a%ed &g into " h'tory and
realized..
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GRAPHS ARE
EVERYWHEREtorsdag 17 oktober 13
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1999
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Let’s build a graph database!
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And called it Neo, since we all
love The Matrix
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And make it open-source so everyone
can join the fun
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IDEA
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PROTOTYPE
IDEA
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PROTOTYPE
RUNNING IN PRODUCTION
IDEA
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~ 55 employeesIn 11 countries
A startup
50 000 NIP every month 2% customers of the global 2000
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Coolest Application Built in Neo4j
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GRAPHS ARE
EVERYWHEREtorsdag 17 oktober 13
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GRAPHS ARE
EVERYWHEREtorsdag 17 oktober 13
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So what is a graph database?
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What is a graph?
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Object (vertex, node)
What is a graph?
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Object (vertex, node)
What is a graph?
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Object (vertex, node)
What is a graph?
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Object (vertex, node)
What is a graph?
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Object (vertex, node)
What is a graph?
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Object (vertex, node)
Link (edge, arc, relationship)
What is a graph?
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Peter
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Peter
Johan
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Peter
Johan
Emil
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Peter
Johan
Emil
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Peter
Johan
Emil
Friend Of
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Peter
Johan
Emil
Friend Of
Friend Of
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Peter
Johan
Emil
Friend Of
Friend Of
Friend Of
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Peter
Johan
Emil
Friend Of
Friend Of
Friend Of
Frien
d Of
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Peter
Johan
Emil
Friend Of
Friend OfFrien
d Of
Friend Of
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PeterAge:38
JohanAge: 36
EmilAge: 34
Friend Ofsince: 1994
Friend Of
Since: 1992 Frien
d Of
Since: 19
84
Friend Since: 1994
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Modeling a graph
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Step one: Start with a whiteboard and a pen
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Step two: Use your imagination
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Everyone watch movies
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LANA WACHOWSKI
CLOUD ATLASTHE MATRIX
HUGO WEAVINGTOM HANKS
ACTED_IN
LANA WACHOWSKI
ACTED_IN
ACTED_IN
ACTED_IN
DIRECTED
DIRECTED
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LANA WACHOWSKI
CLOUD ATLASTHE MATRIX
HUGO WEAVINGTOM HANKS
ACTED_IN
LANA WACHOWSKI
ACTED_IN
ACTED_IN
ACTED_IN
DIRECTED
DIRECTED
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name: LANA WACHOWSKInationality: USa
won: Razzie, Hugo
title: CLOUD ATLASgenre: drama, sci-fi
title: THE MATRIXgenre: sci-fi
name:HUGO WEAVINGnationality: Australiawon: MTV Movie Award
name:TOM HANKSnationality: USAwon: Oscar, Emmy
ACTED_INrole: Bill Smoke
LANA WACHOWSKI
ACTED_INrole: Zachry
ACTED_IN
ACTED_INrole: Agent Smith
DIRECTEDDIRECTED
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So?
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name: LANA WACHOWSKInationality: USa
won: Razzie, Hugo
title: CLOUD ATLASgenre: drama, sci-fi
title: THE MATRIXgenre: sci-fi
name:HUGO WEAVINGnationality: Australiawon: MTV Movie Award
name:TOM HANKSnationality: USAwon: Oscar, Emmy
ACTED_INrole: Bill Smoke
LANA WACHOWSKI
ACTED_INrole: Zachry
ACTED_IN
ACTED_INrole: Agent Smith
DIRECTEDDIRECTED
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CYPHER
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CYPHER
Cypher is Neo4j's graph query language
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// get node with id 0start n=node(0) return a// find nodes connected to node 1start n=node(1) match (n)-->(m) return m// create a nodecreate (me {name:'Pernilla'})// delete relationshipstart n=node(1) match (n)-[r]->(m) delete r
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• Declarative Pattern-Matching language
• SQL-like syntax
• Designed for graphs
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It’s all about Patterns
A
B C
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Two����������� ������������������ nodes,����������� ������������������ one����������� ������������������ relationship
a b
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Two����������� ������������������ nodes,����������� ������������������ one����������� ������������������ relationship
(a) --> (b)
a b
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Two����������� ������������������ nodes,����������� ������������������ one����������� ������������������ relationship
START a=node(*)MATCH (a)-->(b)RETURN a, b;
a b
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A
A
A
B
B
B
START a=node(*)MATCH (a)-->(b)RETURN a, b;
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A
A
A
B
B
B
START a=node(*)MATCH (a)-->(b)RETURN a, b;
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A
A
A
B
B
B
START a=node(*)MATCH (a)-->(b)RETURN a, b;
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A
A
A
B
B
B
START a=node(*)MATCH (a)-->(b)RETURN a, b;
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torsdag 17 oktober 13
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torsdag 17 oktober 13
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Aren't we defined by how the world relates to us?
torsdag 17 oktober 13
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Become a graphista?
torsdag 17 oktober 13
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Questions?
THANK YOU!
torsdag 17 oktober 13
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torsdag 17 oktober 13