Book Image

Learning Neo4j 3.x - Second Edition

By : Jerome Baton
Book Image

Learning Neo4j 3.x - Second Edition

By: Jerome Baton

Overview of this book

Neo4j is a graph database that allows traversing huge amounts of data with ease. This book aims at quickly getting you started with the popular graph database Neo4j. Starting with a brief introduction to graph theory, this book will show you the advantages of using graph databases along with data modeling techniques for graph databases. You'll gain practical hands-on experience with commonly used and lesser known features for updating graph store with Neo4j's Cypher query language. Furthermore, you'll also learn to create awesome procedures using APOC and extend Neo4j's functionality, enabling integration, algorithmic analysis, and other advanced spatial operation capabilities on data. Through the course of the book you will come across implementation examples on the latest updates in Neo4j, such as in-graph indexes, scaling, performance improvements, visualization, data refactoring techniques, security enhancements, and much more. By the end of the book, you'll have gained the skills to design and implement modern spatial applications, from graphing data to unraveling business capabilities with the help of real-world use cases.
Table of Contents (24 chapters)
Title Page
Credits
About the Authors
Acknowledgement
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Removing all the geo data


You may want to remove all the indexed nodes from the spatial tree. You can do this by removing all the layers, which is a rather expeditive method indeed.

Try this code, which should return an empty list :

// Removing all spatial layers
CALL spatial.layers() YIELD name AS name
WITH collect(name) AS names
UNWIND names AS nameL
CALL spatial.removeLayer(nameL)  // enamel layer :)
call spatial.layers() YIELD name AS name2
WITH collect(name2) AS emptyNamesList
RETURN emptyNamesList

I hope you enjoyed this chapter, particularly rich in puns and wordplays.