Neo4j 3.3.5 Dmg

14.01.2020

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Don’t use this if you’re fond of SQL joins and static schemas

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Neo4j and its Cypher language
Use cases in new Sandbox
Install on Mac using Homebrew
Database creation commands
Load data
Cypher Query
Importing data
Language Extensions
Social
Triplestore
More info

NOTICE: Below are my notes on Neo4j I have abandoned because I found the product to be too difficult to figure out for me, with not enough support nor documentation. The killer for me is not being able to get pass the password on initial use.

This tutorial is a hands-on introduction to install Neo4J, configure, create a database from commands,load data, etc. Rather than innudating you with facts and conceptual words to remember, commentary here is provided after you take some action, step-by-step. Like a guided walking tour. So you learn by doing. “PROTIP” flags unique or important information.

The contribution of this article is a maticulously sequenced presentation that curates a concise yet deep tidbits from the many resources about this topic.

Before reading this, read my notes on graph databases.

The great thing about Neo4j is that it can provide future flexibility with multi-platform data access without being locked in. This means if you want to use a different language (such as C#) next year, you can access the same database (using a plugin for that language). If your data volume scales massively, you can easily switch to a cloud-based Neo4j database. That’s not the case with Python data dictionaries. If data expands, you would need to either need to get a larger machine or rewrite to access databases.

There are several ways to use Neo4j:

Online Sandbox showcasing Bloom visualization and other use cases
Install on a Mac using Homebrew:
- Install Desktop using Homebrew
- Install Neo4j server locally using Homebrew
Neo4j’s own Aura cloud offering runs on GCP (Google Cloud Platform).
Install Neo4j server in an EC2 instance

If you’re on Windows, read this.

Neo4j and its Cypher language

Neo4j is a product from Neo Technology, Inc. since 2007.

neo4j.comstarted as neo4j.org but now Neo4j installers include a Enterprise edition which requires buying a license (unless the application built on top of it is also open-sourced) to unlock limitations, allowing for LDAP role-based and subgraph access control, lock manager, clustering, hot backups of Causal Clustering using Raft protocol, and monitoring. See https://neo4j.com/startup-program/

Flagship customers include* Walmart, eBay, Cisco, Citibank, ING, UBS, HP, CenturyLink, Telenor, TomTom, Telia, Comcast, Scripps Interactive Networks, The National Geographic Society, Airbus, Orange, AT&T, Verizon, DHS, US Army, Pitney Bowes, Vanguard, Microsoft, IBM, Thomson Reuters, Amadeus Travel, Caterpillar, Volvo, and many more.

Neo4j open-sourced (at github.com/neo4j/neo4j) their “Cypher” OpenCypher query language in 2015. Among their docs is a “Refcard” of commands that are declarative (the database figures out how to do the fetching).

Developer Certification

Neo currently sends you a certificate for free if you answer 80% of 80-questions in their 60 minute on-line exam (by classmarker.com). It covers these 105 points by subject category:

44 - Cypher syntax, including creation and querying of data
11 - Developer - Developing with Neo4j
35 - Intro
15 - Modeling (The property graph model)

After going through materials below, sign up and take the exam at neo4j.com/graphacademy/neo4j-certification. At this time, you can take as many tries as you want, so use it to prompt your research.

What about the blue t-shirt?

Visual diagrams and ASCII art

Neo4j databases can be defined as both visual diagrams and by ASCII art.

[23:50] into VIDEO:

Each node can be labeled (such as entity type “Person”), have an identifier (id), and contain properties (attributes).

Its relationships from the movie “Matrix”. [13:26]

MATCH and RETURN are Cypher keywords that perform some action. Ironically, these are in all-caps but can be like “maTch” or “return” (are case-insensitive). However, others are case sensitive.

path is a variable.
:Movie is a node label.
:ACTED_IN is a relationship type.
Parentheses define nodes.
Square brackets provide details such as an action verb.

”->” arrows define one-way relationships between nodes, with Patterns drawn by connecting nodes and relationships.

In VIDEO: What are Graph Databases and Why should I care?,Dave Bechberger (@bechbd of Expero Labs and VIDEO: A Skeptic’s Guide to Graph Databases) explains that with Neo4j, one can easilly “travese” a graph with arbitrary hops such as “similar” to identify a recommandation:

With Neo4j, one can “travese” a graph with arbitrary hops such as “similar”without the need to build foreign key joins or bridge tables.

PLUG: Moreover, as more relationships are added in Neo4j, performance is not degraded with joins.

Sample graph and code in legacy Console

http://console.neo4j.org is a legacy UI that displays a sample graph defined by this Cypher code:

Note the commas separating commands.

Query:

Note spaces separating commands.

Use cases in new Sandbox

In a Chrome browser, go to neo4jsandbox.com, which provides built-in guides and sample datasets for popular use cases for a limited time:
Bloom visualization
Select the Bloom “springy” UI for Visual Discovery (a good first one to view)
Neo4j’s Bloom visualization is a web GUI that allows “near natural language” filter text to control what is visualized from the database (docs)
VIDEO preview based on the Beers database.
Different “Perspectives” show different information depending on permissions level.

Parent/Child in Sample Recommendations

In VIDEO: Graph Databases Will Change Your Freakin’ Life Nov 28, 2016, Ed Finkler (CTO of Cloud SaaS vendor GraphStory.com) presents this sample graph:

The arrow in the relationship line points from the “CHILD_OF” in the direction of the parent.A property of this relationship (named “Created”) is when the relationship was established (in “2002”).

Prior Cyber Console Online

Prior to the Sandbox was http://console.neo4j.org, still available.

Other Use cases in sandbox

Also on neo4jsandbox.com

Spreadsheets Grapher (load Google Sheets)
Graph Algorithms
Legis Graph? (models US Congress bills, members, votes)
Recommendation engines
Crime investigation uses a “POLE” model (Persons, Objects, Locations, Events) applicable to most forensics
Sports (Women’s World Cup 2019)
Paradise Papers by ICIJ (offshore account info leaked) VIDEO: “Graph databases: The best kept secret for effective AI”
Russian Twitter Trolls
Twitter (analysis)
Trumpworld (from Buzzfeed)
Conference (GraphConnect 2018 schedule)
Network/IT management
Blank sandbox
Neo4j 3.3
Neo4j 3.4
Neo4j 3.5.3

Additional use cases from VIDEO: “Neo4j Top Use Cases”, etc:

Geography (Euler’s 7 bridges of Kunisberg)
Internet of Things(IoT)
fraud detection,
Artificial Intelligence
Knowledge graph
Centrality and Clustering
Master data

Episodes of Dr. Who, mentioned by Ian Robertson, Neo4j Lead Engineer.

Docker Install

PROTIP: Alternately, rather than doing the above by hand, I recommend that you create and store in GitHub a shell script that does the above, then execute it a single command.

Create or navigate to an account folder, such as:
Clone the whole repo, which creates the repo’s folder,
Set permissions, then run neo4j-docker.sh cloned from GitHub:
Set permissions, then run it:
-a actually runs the docker run command.
When you see this, you’re within the Docker container:
Optionally, you can exit the script here by typing exit.
Set permissions, then run Neo4j’s Cyhper shell:
Type in Neo4j Cypher commands as described below.
Optionally, you can exit here by typing :exit,the exit the Docker container with exit.

Alternately, there is a Docker image at https://hub.docker.com/_/neo4j

Install on Mac using Homebrew

PROTIP: Its better to install on you local laptop, which does not expire, as Sandbox instances do after 10 days.

PROTIP: If you’re installing on your laptop, I recommend use of Homebrew for its ease-of-use, even though its version can be behind the official website.

In a Terminal:
Pre-requsite Java
Install pre-requisite AdoptOpenJDK 8 with Homebrew Cask:
PROTIP: Neo4j is multi-platform because it is written in Java.
Response:
Verify:
Troubleshoot if you don’t see:
To avoid Desktop database creation error
Using Mac Finder:
Navigate to the directory where the jre is installed, in my case it was in:C:Program Files (x86)Javajre1.8.0_201bin2 - Within this directory create a folder called server3 - Still in the bin directory, go to the client directory4 - Copy all content from the client folder into the sever folder5 - Restart Neo4J Desktop as administrator6 - Try again to create the database
Install server
From any folder:
The response shows that there is both a cask (UI) and command-line neo4j avialable:
Cask install Desktop on Mac
From any folder:
Install the latest version:
In the Mac’s Finder app, navigate to your /Applications folder. Scroll to see “Neo4j Desktop”.
PROTIP: Here is where you’ll remove the program by right-clicking and selecting “Move to Trash”.
Alternately, pinch 4 fingers together on the Mac’s Touchpad to swipe until you see the Neo4j logo.
Click on the logo. You should see this:
Enable offline mode
Click the “gear” icon on the left menu.
Check “Enable offline mode.
Define Graph database
Click the “Graph” panel.
Click “Create a Local Graph”.
Click “Graph” next to the database “sandwich” icon.
Replace “Graph” with “Dr.Who” or other name for sample database.
Click in the Set Pasword field and type a password (“password”).
Click “Create”.
Browser
Click “Neo4j Browser” for a pop-up dialog:
Click the documentation icon for a list of Documents to read:
Next, work with databases.

Install Enterprise Desktop GUI

Alternately:

Select Save file such as neo4j-desktop-offline-1.2.3.dmg.
From Finder, invoke the installer.
Authorize the Desktop App by copying and pasting the Desktop key and pasting it in the app’s Authorization field.
Create a database per instructions.
Install server CLI on Mac using Homebrew
If you want programs making calls to a Neo4j server:
From any folder, get information about it:
PROTIP: Notice in the response “Required: java = 1.8 ✔” that a JVM is a pre-requisite for Neo4j server:
Install the latest version:
The response presents tips for starting the server:
Remember the path above for the forthcoming step:
Verify version:
### Configure Environment VariablePROTIP: The Summary response provides a hint of where Neo4j's binary is located.
Create an environment in ~/.bash_profile to hold the curerent version:
Create an environment in ~/.bash_profile to hold a path to the goodies:
The response should be:
Install utilities
Install the Apoc neo4j-contrib library of community-contributed code:
Identify the latest release in community-contributed jar from https://github.com/neo4j-contrib/neo4j-apoc-procedures/releases
Navigate to the plugins folder temporarily to obtain the url to the latest release to download, such as:
VIDEO: Neo4j APOC Utility Library HowTo Series
Edit $NEO4J_HOME/conf/neo4j.conf
Whitelist only specific procedures and functions (rather than all) to be loaded:
Save and exit the text editor.
Streaming Graph Loading with Neo4j and APOC Triggers by David Allen
See https://medium.com/neo4j/efficient-neo4j-data-import-using-cypher-scripts-7d1268b0747
Now skip to the Invoke section.
Alternately:
Manual download back version
You may want to install a back version if you want to follow along an older tutorial:“Introduction to Graph Databases and Neo4j2h Pluralsight video course by Microsoft MVP Roland Guijt (@RolandGuijt, rmgsolutions.nl)released February 5, 2015 while using Neo4j version 2.1.3 on Windows.So the UI has changed.
In an internet browser, go to Neo4j’s Other Releases to download:
Find the link for the version you want to use.
Click the “Download” button for sign-ups
Get the OReilly book.
Manual install
neo4j-desktop-?.?.?.dmg
Click “Open” to “Are you sure you want to open it?”.
Click “I Agree”.
Login using your email or through social media.
NOTE: It says Java 8 is downloaded if it doesn’t exist, but I got errors.
Set the $NEO4J environment variable to point to where Neo4j is installed.
Invoke
For a menu, invoke the neo4j CLI executable without any parameters:
The help response lists the sub-commands:
Initially we don’t want/need a background service, so:
If you had installed using Homebrew:
Alternately, to start neo4j now and automatically restart at login:
Add sudo before the command if you get this error:
The expected response (at time of writing):
Verify:
You should see:
Open in the default internet browser:
Restart server
Stop server
To get the PID for the Neo4j process, widen the Terminal screen, then:
Remember the PID on the line containing this CMD:
Stop it:
Edit Config for upgrade
Within a Terminal, edit the configuration file using “subl” or substituting “vi”, “nano”, or your preferred text editor (Visual Studio Code, which is invoked by the code command):
See a description of the dozens of keys at:https://neo4j.com/docs/operations-manual/3.5/reference/configuration-settings
Find text “dbms.allow_upgrade=” within the file.
Remove the # comment so your database upgrades automatically in case its built version is older than your current Neo4j version:
Set logging specifications: TODO:
Change the password:
Connect to Neo4j
Database access not available. Please use to establish connection. There’s a graph waiting for you.
Type the default username and password of “neo4j” and “neo4j”.
Click “Connect”.
BLAH

Graph database can store any kind of data using these concepts:

Nodes - graph data records
Relationships - connect nodes
Properties - named data values

https://diseaseknowledgebase.etriks.org/metabolic/browser/

### Query Logging

Query logging must be enabled by setting the parameter to:
To set all queries to be logged:
Alternately, set a threshold for the number of seconds before logging, such as 7:
There are additional logging parameters that are false by default:
Save the file and exit the editor.
Start Browser Console
When your Neo4j instance is ready:
Open the Neo4j Browser client:
PROTIP: So you can quickly switch among the two using Command+Tab, open a browser different than the one used to display this tutorial (perhaps Firefox instead of Chrome), thengo to the default URL:
From https://neo4j.com/developer/docker-run-neo4j/
Alternately, when running within Docker Machine, open the Neo4j Browser client using your default browser. On a Mac:
Ports (within Docker)
PROTIP: By default the Docker image for Neo4j exposes three ports for remote access:
- 7474 for HTTP
- 7473 for HTTPS
- 7687 for Bolt
Bolt Network Protocol
PROTIP: Although Neo4j as a transactional http/https versioned endpoint, the Neo4j database (since v3) by default communicates using the Bolt binary protocol (for multi-cluster routing) based on Packetstream. Much like JDBC for relational databases, Bolt operates over a TCP connection or WebSocket. Built-in Auth and TLS. It’s defined at Bolt network protocol. Connection credentials are stored in your web browser, such as:
To use the default bolt:
Confirm:
returns:
Currently, Neo4j only supports one Graph per Database.
Browser Commands
Commands can be entered in the Editor field at the top which begins with a dollar sign in gray.
Click the top command entry field to the right of the dollar sign, type the first letter of commands, a colon (:), for auto-completion list of most common commands:
Dark theme color for commands
Click the gear icon near the lower-left corner among menu icons.
Click Theme Dark.
Click the icon again to dismiss menu contents. (it’s a toggle)
Play intro
Click the icon that looks like a book (previously this was an i icon for information).
Click “Getting Started”.
Notice that these commands appear in the command field:
Notice that the commands now have different colors.
To submit the command, press Enter or click the arrow icon at the upper-right corner.
The page says for multi-line commands to press Shift+Enter to enter multi-line mode,then press Ctrl+Enter instead of the arrow icon.
Scroll down the page to see that the new response is added above the previous frame, as in a stack as a stream.
Click the gray X to dismiss a content frame.
Click “Operations Manual” under Useful Resources to pop up a new browser tab to the version installed:
https://neo4j.com/docs/operations-manual.
Monitoring limits
Type command :sysinfo and press Enter for:
PROTIP: Execute this on a schedule to ensure that more space is allocated before need.
Manage users and roles
PROTIP: Passwords can be changed in the command line. See:https://neo4j.com/docs/operations-manual/3.2/reference/user-management-community-edition/#userauth-list-all-users-ce
https://neo4j.com/docs/operations-manual/3.2/tutorial/role-based-access-control/
The Enterprise edition of ???
Change password
Per documentation:
http://boopathi.me/blog/reset-neo4j-graph-database-password/
Notice in the sample console image that the password is blank.
In the Password field, type the default “neo4j” (lower case).
Type your own password. Twice.

Note in the response your user name is “neo4j”.

After desktop install:

Database failed to create: Error: Could not change passwordhttps://github.com/neo4j/neo4j/issues/11429

Database creation commands

Neo4j comes with several databases.

Click “Write Code” and press Enter to invoke :play write code.
Movie sample creation
See instructions to build a relationship graph about among actors and directors:
The “Create” pane appears with code that begins with command “CREATE”.
Click the code for it to be posted in the command line.
Click the full screen icon.
BLAH: Drag and drop items to arrange the graph to your asthetic taste.
This is like ER (Entity-Relation) diagrams for SQL databases.
PROTIP: Neo4J data is stored the same way as illustrated by the data model, whereas with SQL data is stored in separate tables joined together.
The gray controls appear after you click on an object (the red colored dot labeled “The Polar Express”).
Click the “X” in the wheel to delete the node.
PLUG: Thus, Neo4j is naturally adaptive.Entities can be added dynamically, without schema migrations required in SQL databases.
Click the database icon at the top of the left menu to view a list of
- Node Labels
- Relationship Types
- Property Keys
Create an entry:
On Create, time stamp: [40:40]
Modify an existing entry with a tagline: [37:11]

Create a relationship: [37:31]
Northwind sample creation
VIDEO:
PROTIP: Relations are not “first-class citizens” in a relational database.But they are in graph databases.
https://github.com/neo4j-contrib/developer-resources/tree/gh-pages/data/northwind
Open the “Northwind” sample database which Microsoft provides with its SQL database.
This is a more complex database with data common to business accounting.

</pre>

### Indexes

Indexes are used to find the starting point for queries to traverse (where by contrast SQL uses indexes to look up rows in tables)

PROTIP: Cypher keywords ENDS, WITH, and CONTAINS are, as of v3, index-backed. Neo4j uses “index read adjacency” to make itself quicker to traverse nodes instead of slower index lookups in SQL.

To improve performance, indexes in Neo4j can be backed by Lucene index type.

To schedule resampling of an index:
Overwatch do you do more dmg if your on fire chords. In Overwatch, though, it's a badge of honour - a sign that you're doing well. You're the most fire player in the goddamn match, you proudly think to yourself as your flesh slowly melts away.

Load data

First, stop the service:
Stop Browser
Open a Terminal window to issue command:
The response:
Now you can backup and dump the database.
Switch to or open a Mac/Linux Terminal instance and:
Notice graph.db.
PROTIP: In the Neo4j world, a physical database consists of files stored under a folder named with a .db suffix. A “graph” references a physical Neo4j database that stores data.
Backup default database
See https://neo4j.com/docs/operations-manual/3.2/tools/dump-load/for the various attributes to add.
Download sample DrWho database
With the server stopped:
Open a new browser tab to download a zip file containing a sample database from:
Right-click to Save Link as… (download) the Jim Webber’s Doctor Who Data Set drwho.zip file to your Downloads folder.
Unzip the file to create folder drwho.
Look into the folder index.
PROTIP: Neo4j uses Lucene to index, same as ElasticSearch and others.
Copy the drwho folder within the Neo4j database folder:
Check db consistency
See https://neo4j.com/docs/operations-manual/3.2/tools/consistency-checker/
Use cases
Recommendations can be made. You like Tom Hanks? Here are his other movies.
More sophisticated versions of such a database are being used to detect fraud. See https://t.co/OMHaHOrYtq
Video of use cases “What SQL had to process in batch can now be processed in real-time with Neo4j.”
https://www.youtube.com/watch?v=lb90EBfAj0o
https://maxdemarzi.com/2017/11/21/mutual-fund-benchmarks-with-neo4j/
Graph Gists
The developer community’s repository of sample data models and queries for a variety of use cases at portal.graphgist.org is showcased on the neo4j.com/GraphGists web page.
Any developer can create a GraphGist. Reach out to [email protected].
Building a graph of your data is fairly simple as the graph structure represents the real world much better than columns and rows of data.
Mental Illnesses
The Open Source Mental Illness Neo4j database is at:https://github.com/OSMIHelp/osmi-survey-graph
VIDEO: datasets are easily accessible using the blue “Write Code” button under the “Jump into Code” section of the guides.

Cypher Query

https://www.opencypher.org/#resources

A big innovation by Neo4j is that it provides programmers with a flexible network structure of nodes and relationships rather than static SQL tables.

Cypher is a language akin to SQL.

Cypher Style Guide (for M08), a 10-page pdfcovers Indentation and line breaks, Meta-characters, Casing, Patterns Spacing. The document presents this classical piece by Mark Needham:as a “sane query”:

PROTIP: Do not use a semicolon at the end of the statement.

execution plan with EXPLAIN and PROFILE.

https://www.youtube.com/watch?v=1TSBXZMv6tc

https://neo4j.com/download-thanks-desktop/docs/developer-manual/current/cypher/#how-do-i-profile-a-query

Neo4j is considered among other “NOSQL” database tech that include Key-Value Stores, Column-Family Stores, and Document Databases. But these others use aggregate data models whereas graph databases such as Neo4j work with simple records and complex interactions.

Instead of SQL union statements. an example of code is:

Direction

Neo4j API allow developers to completely ignore relationship direction when querying the graph.

https://www.youtube.com/watch?v=NH6WoJHN4UA&index=3&list=PL9Hl4pk2FsvWM9GWaguRhlCQ-pa-ERd4U

Fast?

For many applications, Neo4j offers orders of magnitude performance advantage compared to relational DBs. Each index and join adds to the time needed.

Antlr grammar
EBNF (Extened Backus–Naur Form) metasyntax notation is used to make a formal description of a formal (computer programming) language . “Extended” refers to its pedigree from Niklaus Wirth’s BNF syntax which consists of some of the concepts, but with a different syntax and notation. See https://en.wikipedia.org/wiki/Extended_Backus%E2%80%93Naur_form
Railroad diagrams https://s3.amazonaws.com/artifacts.opencypher.org/M08/railroad/Cypher.html
Grammar specification
TCK (Technology Compatibility Kit) specification

Importing data

Michael Hungar, Neo4j Developer Evangelist, wrote

Michael started the https://github.com/neo4j-contrib “Apoc” add-on library for Neo4j neo4j-apoc-procedures. It provides hundreds of procedures and functions adding a lot of useful functionality. It is available in all Neo4j Sandboxes and in the Neo4j Cloud.It can also be installed with a single click in Neo4j Desktop.It’s described with videos at neo4j.com/labs/apoc and in the Developer Guide which references https://github.com/neo4j-contrib/developer-resources.

We build something similar to apoc.load.json just for YAML. You can create a GH issue there and ask for guidance.

VIDEO:Ambrose Leung at Microsoft Seattle wrote aka.ms/csv2graph program to load CSV files using API calls.

Click the star icon on the menu to reveal the import area to drag files.
Only text files are dropped there, not images of Neo4j databases (.db files).
Import your own data
http://guides.neo4j.com/fundamentals/import.html
Import data from CSV files using Cypher LOAD CSV command in the developer guide[49:12]
Polyglot
Neo4j believes in polyglot persistence (multiple ways to store connected data), with columnar, tabular and document data stored elsewhere. The various types of data integrations possible with Neo4j is at: https://neo4j.com/developer/integration/
For information about importing transactions into the database, see:https://neo4j.com/docs/operations-manual/3.2/tools/import/https://neo4j.com/docs/operations-manual/3.2/tutorial/import-tool/
The above links are for a specific version, so can becone outdated.

Optimizing Cypher Queries

Programming

A “hello world” example of a @userfunction:

> “Hello World”

Example of making a call in Cypher:

Language Extensions

To extend Cypher with user-defined procedures in JavaScript, C# .NET, Python, and Community drivers such as R, see https://neo4j.com/developer/language-guides

Python

git clone https://github.com/neo4j/neo4j-python-driver
Graph Databases in Python from 2012
https://github.com/neo4j/neo4j-python-driver

Install Python driver:
The response (at time of writing):

Java coded queries

Neo4j provides Native server-side extensions in Java.

https://neo4j.com/blog/efficient-graph-algorithms-neo4j/

For large amounts of data, Cypher run time performance may be slower than Java API coding of traversals and writes. So do massive writes by writing a Java API program to read and query using parameterized Cypher queries.

Get the official drivers for Javascript, Java, .NET, and Python

https://neo4j.com/docs/developer-manual/current/drivers/#driver-get-the-driver

Additionally, the community has built a wide variety of other drivers in languages like PHP, Ruby, Go, Haskell and more.

https://neo4j.com/developer/language-guides/

https://neo4j.com/docs/developer-manual/current/procedures/

Awesome Procedures

APOC (Awesome Procedures on Cypher) are complex implementations that can’t be expressed directly on Cypher. They support data integration, graph algorithms, data conversion.

refers to the code repository at:

Social

community.neo4j.com provides weekly news and highlights popular community content.
Sign up for events at neo4j.com/events/world/all
Sign up for http://neo4j.com/slack at http://neo4j-users-slack-invite.herokuapp.com/
Join https://groups.google.com/forum/#!forum/neo4j
Subcribe to Neo4j’s YouTube channel and view videos.
Click the icon at the bottom-left corner among menu icons.
Q&A on http://stackoverflow.com/questions/tagged/neo4j
Visit a Meetup group - https://www.meetup.com/Neo4j-Online-Meetup/
Tweet to https://twitter.com/neo4j - #GraphViz #Neo4j #GraphDatabases
Read https://neo4j.com/blog/
Read https://en.wikipedia.org/wiki/Neo4j

Live in person

https://www.meetup.com/pro/neo4j/

Travel to the https://neo4j.com/GraphTour
http://datadaytexas.com/2018/graphday (@GraphDay) was Saturday, Jan. 27, 2018 in Austin, TX #ddtx18.

Rockstars

Michael Hunger (@mesiri), Neo4j developer evangelist in Dresden, Germany

http://jexp.de (personal website)

Jim Webber provides “koan” style tutorial presents a set of databases which have something not right, so students learn to fix things. Brilliant approach and a great learning tool:

https://github.com/jimwebber/neo4j-tutorial

Ryan Boyd (LinkedIn)a SF-based ex-Googler, now Neo4j Head of Developer Relations.

5 short videos from March 2016 annotated in the Intro to Graph Databases

William Lyon (@lyonwj, lyonwj.com), software developer on the Developer Relations team, he works primarily on integrating Neo4j with other technologies, building demo apps, helping other developers build applications with Neo4j, and writing documentation. Applying an active learning algorithm for entity de-duplication in graph data.

https://www.slideshare.net/neo4j/building-a-graphql-service-backed-by-neo4j
https://github.com/neo4j-graphql/neo4j-graphql
https://grandstack.io (GraphQL, React, Apollo, Neo4j)

Emil Eifrem (@emileifrem, [email protected]), CEO

Introduction to Graph Databases Jul 14, 2011
Graph for the mass market: Neo4j launches Aura on Google Cloud

Mark Needham and Amy E. Hodler

DOWNLOAD O’Reilly BOOK: Graph Algorthms: Practical examples in Apache Spark and Neo4j
https://neo4j.com/docs/graph-algorithms/current/

Tim Ward (@jerrong, [email protected])

Using Neo4j and Machine Learning to Create a Decision Engine https://www.slideshare.net/neo4j/graphconnect-europe-2017-using-neo4j-and-machine-learning-to-create-a-decision-engine-cluedin

Mats Rydberg living in Sweden

https://github.com/opencypher Mats-SX
https://github.com/opencypher/openCypher/blob/master/tools/tck/README.adoc

Johan Svensson, CTO

Philip Rathle, products VP

Neo4j, Inc. board of directors includes Rod Johnson (founder of the Spring Framework).

@GraphCurmudgeon

Rik van Bruggen

References and tutorials

O’Reilly’s Graph Databases 211 page ebook from May 2015 with NeoLoad 2.2:

https://github.com/graphaware/neo4j-nlp Implementation of Microsoft Concept Graph

https://www.experfy.com/training/courses/an-introduction-to-neo4j#description $80 class

From https://neo4j.com/blog/7-ways-data-is-graph/

quackit.com/neo4j/tutorialcontains lots of ads, but is a nicely formatted tutorial if you don’t mind clicking after reading a few lines.

https://buff.ly/2w9PQFy The Top 13 Resources for Understanding Graph Theory & Algorithms

https://r.neo4j.com/2iSaBRi Geocoding #ParadisePapers Addresses in #Neo4j to Build Interactive Geographical Data Visualizations

Whats the difference between Crit Atk and Crit DMg? We know crit rate is just the chance of you critting on each hit. Either crit atk or crit dmg, amplifies your crit dmagae (purple numbers), so which 1. 3 points 1 year ago. Whats the chance of crit dmg gloves maplestory. Crit damage is Bis when it comes to glove potential. So if you roll it, keep it. Its best to aim for 2 lines. Idk if its possible for 3 lines. Depends on your current%crit damage and%str. After Union 30% stat should be better than 8% crit damage for most classes because of that 20% crit damage. Meanwhile, your effective crit damage is unlikely to be higher than about 65%, making an additional 1% crit damage a marginal dps increase of 0.6%. Tl;dr crit damage is more than twice as strong as boss damage, point per point. Nov 25, 2017 Originally these gloves were 2 line crit damage and 13% INT (3 prime lines) which took around 10b. I did not like the%INT line so I decided to buy 20 black cubes and on the 4th cube I ended up with this luckily haha. I didn't invest much on these gloves so regardless of it being abso or not it's still a great damage boost for me.

https://www.slideshare.net/bachmanm/modelling-data-in-neo4j-plus-a-few-tipsneo4j-property-graph-pulp-fiction.png

https://www.slideshare.net/KennyBastani/building-a-graph-based-analytics-platform?next_slideshow=1

https://www.youtube.com/watch?v=78r0MgH0u0w
https://www.youtube.com/watch?v=vJcxRjJ982k
https://www.youtube.com/watch?v=NO3C-CWykkY&index=4&list=PL9Hl4pk2FsvWM9GWaguRhlCQ-pa-ERd4U

Triplestore

Triplestore is based on the semantic web W3C RDF (Resource Definition Framework) for inter-connection

It is based on the subject - object - predicate tripleswhere each property is a vertex (node).

An example is airline flight information VIDEO:

Graph databases are used by inference engines to discover relationship insights not easily found using traditional approaches. Thus, it is popular among (crime) forensic scientists.

Aggregate functions

Aggregates in Cypher do not require a “GROUP BY” keyword as in SQL.

A node and relationship are essentially a container of properties.

See the one-page Cyhper Refcard.

@UserAggregationFunctions need to keep state (the aggregates).

Timings / State

More info

https://github.com/elementsinteractive/flask-graphql-neo4jhttps://medium.com/elements/diving-into-graphql-and-neo4j-with-python-244ec39ddd94makes use of docker-compose based onhttps://hub.docker.com/_/neo4j/

https://github.com/wgwz/flask-neo4j-demoby Kyle Lawlorhttps://github.com/wgwz/flask-py2neo

https://www.youtube.com/watch?v=78r0MgH0u0wTips and Tricks for Graph Data ModelingMar 25, 2015

VIDEO: Introduction to Graph Databases, Cypher, and Neo4jOctober 2018 by Roland Guijt (@RolandGuijt) in the Netherlands.

https://github.com/neo4j-examples

github.com/neo4j-examples contains several

neo4j-movies-template, presented at http://neo4jmovies.herokuapp.com returns an application error.

Neo4j and its Cypher language

Developer Certification

Visual diagrams and ASCII art

Sample graph and code in legacy Console

Use cases in new Sandbox

Bloom visualization

Parent/Child in Sample Recommendations

Prior Cyber Console Online

Other Use cases in sandbox

Docker Install

Install on Mac using Homebrew

Pre-requsite Java

To avoid Desktop database creation error

Install server

Cask install Desktop on Mac

Enable offline mode

Define Graph database

Browser

Install Enterprise Desktop GUI

Install server CLI on Mac using Homebrew

Install utilities

Manual download back version

Manual install

Invoke

Restart server

Stop server

Edit Config for upgrade

Connect to Neo4j

Start Browser Console

Ports (within Docker)

Bolt Network Protocol

Browser Commands

Dark theme color for commands

Play intro

Monitoring limits

Manage users and roles

Change password

Database creation commands

Movie sample creation

Northwind sample creation

Load data

Stop Browser

Backup default database

Download sample DrWho database

Check db consistency

Use cases

Graph Gists

Mental Illnesses