لقاءات الخلیل التقنیةHebron Tech Meetup

Multi-model NoSQL database

Hebron Tech Meetup / 13-02-2016

TopicsThis is slides is presented at “Hebron Tech meetup “ https://www.facebook.com/groups/659298460875650/

1- What is nosql?

Introduction about nosql database , categories of them , and use-cases .

2- introduction to multi-model database.

how it works, explain relationships , and examples.

3- Demo

Open your browser and get you hands dirty with orientDb

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Hello!I am Mahdi AtawnaI am here because I love to give presentations.

You can find me at:

@mshanak

1.What is NOSQL

introduction about NOSQL types and use-casesBY: Shadi atawna

What is Problem of RDBMS?

▷ Schemas aren’t designed for Sparse data.▷ Normalize, creates a lot of tables .▷ Joins can be prohibitively expensive

What is Problem of RDBMS?

▷ Don’t do unstructured data search well (i.e. google type searching)

▷ databases are simply not designed to be distributed○ Don’t Scale well.

○ clustering is not dynamic and expensive.

▷ Class of non-relational data storage systems

▷ Running well on clusters (distributed)▷ Mostly open-source▷ Built for the 21st century web needs .▷ Schema-less

What is NoSQL?

Why NoSQL?

1. Big Users2. Big Data3. The Internet of things4. The Cloud Computing5. Scalability and Performance Advantages6. Flexible Data Model

Types/Models of NoSQL:

1. Key value Databases2. Document Databases3. Column family Stores4. Graph Databases

Types/Models of NoSQL:

1. Key value Databases2. Document Databases3. Column family Stores4. Graph Databases

1Document Databases

a computer program designed for storing, retrieving, and managing document-oriented information, also known as semi-structured data.

Document Databases

Document Databases Example

Document DatabasesFeatures:

1. Making the value visible for query2. Flexible schema3. Semi-Structured.

Limitations:

1. not handling transaction on multiple document.

Use Cases:

1. event logging2. Content management systems, blogging platforms

2Graph Databases

a database that uses graph structures for semantic queries with nodes, edges and properties to represent and store data.

Graph vs RDBMS

A Graph Database creates the relationship just once (when the edge is created)

VS

RDBMS computes the relationship every time you query a database

App with many databases

2.Multi-model database

“A multi-model database combines a

document store with a graph database and is at the same time a

key/value store,

“

Benefits

1. Just one product to learn and maintain2. Just one vendor relationship to manage3. No ETL, no synchronization required4. Performance and Reliability is easy to test

from the beginning

graph example

Popular multi-model databases

http://orientdb.com/orientdb/ https://www.arangodb.com/

OrientDb: Queries

Orient DB uses SQL as it's query language and adds some extensions to enable graph functionality.

1. SQL is the mostly widely recognized standard.2. The majority of developers have experience and

are comfortable with SQL

OrientDb: Select

OrientDb: query examples

> SELECT FROM MyClass WHERE id = 1

> SELECT FROM User WHERE name LIKE 'mahdi%'

> SELECT SUM(salary) FROM Employee WHERE age < 40 GROUP BY job

OrientDb: INSERT

> INSERT INTO Employee(name, surname, gender) VALUES ('Jay', 'Miner', 'M')

> INSERT INTO Employee CONTENT { name : 'Jay',

surname : 'Miner', gender : 'M'

}

OrientDb: JoinsSQL:SELECT *FROM Employee A, City BWHERE A.city = B.idAND B.name = 'Rome'

OrientDb:SELECT * FROM Employee WHERE city.name = 'Rome'

OrientDb: Create Relations

CREATE EDGE FROM #10:3 TO #11:4

CREATE EDGE friends FROM #10:3 TO #11:4

OrientDb: Query Relations/ TRAVERSE

TRAVERSE * FROM #10:1234

TRAVERSE friends FROM #10:1234 WHILE $depth <= 3

TRAVERSE in(“friends”) FROM #10:1234 WHILE $depth <= 3

Query Relations - TRAVERSE

SELECT FROM (TRAVERSE friends FROM #10:1234 )

WHERE city = 'Rome'

-----------------------select from

( traverse in("livedIn") from #15:2 ) where @class="teacher"

3.Demo

Thanks!Any questions?You can find me at:

@mshanak

mshanak@gmail.com

Credits

Special thanks to all the people who made and released these awesome resources for free:

▷ Presentation template by SlidesCarnival▷ Photographs by Unsplash