程序代写代做代考 database SQL Graph Database
Graph Database
Graph Database
Miao Qiao
SEAT
Massey University
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Graph: model the interconnectivity of objects.
Definition (Graph)
A graph G(V , E ) has a set V of vertexes (nodes) and a set E of edges.
Each edge e ∈ E connects two nodes in V .
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Social Network
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Road Network
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Metabolic Network
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Other Networks
• Internet graph.
• Communication networks.
• Distribution networks.
• etc.
Graph is a general tool for modelling the interconnectivity of the objects in
the real world.
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Graph Size
A graph can be extremely large.
See http://law.di.unimi.it/datasets.php.
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http://law.di.unimi.it/datasets.php
Graph Queries
• Path Query.
• Pattern Query.
• Analytical Query.
• · · ·
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Graph Queries
• Path Query.
• Pattern Query.
• Analytical Query.
• · · ·
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Graph Queries
• Path Query.
• Pattern Query.
• Analytical Query.
• · · ·
8
Graph Queries
• Path Query.
• Pattern Query.
• Analytical Query.
• · · ·
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Graph Queries
• Path Query.
• Pattern Query.
• Analytical Query.
• · · ·
Many graph queries can hardly be expressed in SQL and evaluated under
RDBMS.
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Graph data: semi-structured data
• Self-describing data.
• Document/text attached on nodes/edges.
• Queries can be more complicated.
Movie (IMDB):
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Graph data: semi-structured data
• Self-describing data.
• Document/text attached on nodes/edges.
• Queries can be more complicated.
Web graph: webpages and their hyperlinks
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Graph data: semi-structured data
• Self-describing data.
• Document/text attached on nodes/edges.
• Queries can be more complicated.
Who worked in both the team of “Casablanca” and “Play it again, Sam”?
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Graph Databases
Motivation:
• Graph is a general tool for modelling the interconnectivity of the
objects in the real world.
• Real world graphs can be extremely large.
• Graph queries are computational expensive.
• Graph data: semi-structured data.
Aim: to understand and to use
• General graph database Neo4J.
• RDF graphs with their query language SPARQL.
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Graph Databases
Motivation:
• Graph is a general tool for modelling the interconnectivity of the
objects in the real world.
• Real world graphs can be extremely large.
• Graph queries are computational expensive.
• Graph data: semi-structured data.
Aim: to understand and to use
• General graph database Neo4J.
• RDF graphs with their query language SPARQL.
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