Delete all nodes and relationships in neo4j 1.8

Question

I know that many people already ask this question.
for my research, some questions are asked here before

• How to remove all relationships in neo4j chart?
• https://groups.google.com/forum/#!topic/neo4j/lgIaESPgUgE

But still they can’t solve our problems,
we just want to remove the "ALL" nodes and relations "ALL"

suppose delete "ALL" can see that there are remaining 0 nodes 0 properties and 0 relationships

This is a screenshot that I took after performing the removal of "ALL" proposed by the forum

My question is still the same, how to remove all nodes and all relations in neo4j

Answer 1

Starting from version 2.3.0

MATCH (n) DETACH DELETE n 

Docs

Pre 2.3.0

 MATCH (n) OPTIONAL MATCH (n)-[r]-() DELETE n,r 

Docs

Answer 2

you are probably doing it right, only the control panel shows only a higher identifier, and therefore the number of "active" nodes, relationships, although they are not. it is just informative.

to make sure you have an empty graph, run the following command:

 START n=node(*) return count(n); START r=rel(*) return count(r); 

if both give you 0, your delete was successful.

Answer 3

for a large database, you must either delete the database from disk (after you stop the engine, as I assume), or use something like Cypher:

 MATCH (n) OPTIONAL MATCH (n)-[r]-() WITH n,r LIMIT 50000 DELETE n,r RETURN count(n) as deletedNodesCount 

see https://zoomicon.wordpress.com/2015/04/18/howto-delete-all-nodes-and-relationships-from-neo4j-graph-database/ for more information. I compiled this from various answers.

Answer 4

He will do the trick.

 Match (n)-[r]-() Delete n,r;