Delete all nodes and relationships in neo4j 1 8

Question

I know this question is asked by many people already for my research  here s some questions asked before   How to delete all relationships in neo4j graph  https   groups google com forum   topic neo4j lgIaESPgUgE   But after all  still can t solve our problems  we just want to delete  ALL  nodes and  ALL  relationships    suppose delete  ALL  can see there are left 0 nodes 0 properties and 0 relationships  This is the screenshot i took after executing the delete  ALL  suggested by forum   My question still the same  how do delete all nodes and all relationships in neo4j

User · Answer

It will do the trick    Match  n - r -   Delete n r

User · Answer

As of 2 3 0 and up to 3 3 0  MATCH  n  DETACH DELETE n   Docs  Pre 2 3 0  MATCH  n  OPTIONAL MATCH  n - r -   DELETE n r   Docs

User · Answer

you are probably doing it correct  only the dashboard shows just the higher ID taken  and thus the number of  active  nodes  relationships  although there are none  it is just informative   to be sure you have an empty graph  run this command   START n node    return count n   START r rel    return count r     if both give you 0  your deletion was succesfull

User · Answer

Neo4j cannot delete nodes that have a relation  You have to delete the relations before you can delete the nodes   But  it is simple way to delete  ALL  nodes and  ALL  relationships with a simple chyper  This is the code   MATCH  n  DETACH DELETE n  --  DETACH DELETE will remove all of the nodes and relations by Match

User · Answer

Probably you will want to delete Constraints and Indexes

User · Answer

if the name of node is for example   abcd then below query will work    MATCH  n abcd  DETACH DELETE n   This will only delete the node with label  abcd  and all its relation-ships

User · Answer

for a big database you should either remove the database from the disk  after you stop the engine first I guess  or use in Cypher something like   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 some more info I ve gathered on this from various answers

[neo4j] Delete all nodes and relationships in neo4j 1.8

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