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Rodger Lepinsky, Database Expert, Data Analyst, Data Scientist.
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Author: Rodgers Notes Writer

Enron Email Analysis – Persons Of Interest

November 19, 2013 Rodgers Notes Writer 1 Comment

What can we discover about Enron’s People Of Interest by analyzing their email using SQL? Among other things, there was some very abusive management at Enron.

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Posted in: Data Science Filed under: Analysis, Email, Enron, SQL

Analyzing Enron Email Metadata Using SQL

November 10, 2013 Rodgers Notes Writer 2 Comments

What can we discover analyzing Enron emails using SQL? Quite a bit actually.

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Posted in: Data Science Filed under: Analysis, Email, Enron, SQL

NEO4J – Shortest Paths in the Cineasts Database

August 19, 2013 Rodgers Notes Writer Leave a comment

How many movies and co-actors link the actor Henry Fonda from his granddaughter Bridget Fonda? Actually, not many.

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Posted in: Graph Database Filed under: AllShortestPaths, Cypher, NEO4J, ShortestPath

Counting Many Paths Between Nodes In NEO4J

August 16, 2013 Rodgers Notes Writer Leave a comment

Continuing my exploration of DBA_OBJECTS using NEO4J, and Cypher, there can be VERY MANY paths between one object and another. The more complex and interconnected the graph, the number of paths between nodes goes up exponentially.

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Posted in: Graph Database Filed under: Child, Cypher, dba_dependencies, dba_objects, NEO4J, Parents, Path, Tree Structure

Using NEO4J To Find Paths To All Parent Or Child Objects

August 12, 2013 Rodgers Notes Writer 3 Comments

Here’s how to find the paths to all generations of parents or children of an Oracle object using the graph database, NEO4J and Cypher.

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Posted in: Graph Database Filed under: Cypher, dba_objects, NEO4J

Oracle Scripts To Recompile Invalid Objects

August 11, 2013 Rodgers Notes Writer 1 Comment

Invalid objects? Here are some scripts to recompile them.

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Posted in: Power Scripts Filed under: Invalid object

Visualizing Almost Fifty Thousand DBA_OBJECTS In A Graph

August 6, 2013 Rodgers Notes Writer 3 Comments

How would you visualize almost fifty thousand Oracle DBA_OBJECTS? Using the graph database NEO4J and Gephi.

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Posted in: Graph Database Filed under: dba_objects, Fruchterman Reingold, Gephi, NEO4J, OpenOrd

DBA_OBJECTS Tree – Modelled As A Graph in NEO4J, Visualized With Gephi

July 31, 2013 Rodgers Notes Writer 2 Comments

Here’s how you can visualize a tree of DBA_OBJECTS

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Posted in: Graph Database Filed under: Children, dba_objects, Gephi, NEO4J, Parents, Tree Structure

Installing Gephi On 64 bit Machines

July 8, 2013 Rodgers Notes Writer 4 Comments

Installing Gephi on a 64 bit machine? Here are some hints.

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Posted in: Unix and Linux Filed under: Gephi, Java, NEO4J, Windows 7

Installing NVidia Drivers on Redhat 6.4 and Removing Nouveau

July 7, 2013 Rodgers Notes Writer 5 Comments

Need to get rid of Nouveau, use the correct NVidia drivers, and implement an OpenGL 3D engine on Redhat 6.4? Here’s how I did it!

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Posted in: Unix and Linux Filed under: Gephi, Mesa, NEO4J, Nouveau, NVidia, OpenGL 3D, Redhat 6.4

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