View source for Neo4j


== Neo4J ==

Start Up
  bin/neo4j start

as a script
  bin/neo4j $1

For development use these items may want to be turned off,
  SSL - ./conf/neo4j-server.properties ~ org.neo4j.server.webserver.https.enabled - PORT: 7473
  Online Backup -  ./conf/neo4j.properties ~ online_backup_enabled - PORT: 6362

== Sample Cypher ==

Create Node
  CREATE (n:Label {property:'value'}) return n;

Create Node with multiple labels
  CREATE (n:Label1:Label2 {property:'value'}) return n;

Create a Relationship
  MATCH (n1:Node), (n2:Node) CREATE (n1)-[r:RELATIONSHIP]->(n2); <-- Not sure this is correct.
  
  MATCH (n1:Node), (n2:Node) MERGE (n1)-[r:RELATIONSHIP]->(n2); <-- This I believe should be used.

  CREATE (n1:Node)-[r:RELATIONSHIP]-(n2:Node) return n1, n2;

Find Node By Id
  MATCH (n:Label) WHERE Id(n) = 0 RETURN n;

Update Nodes properties
  MATCH (n { name: 'John' }) SET n.surname = 'Doe' RETURN n

Delete Node by Id
  MATCH (n:Node) WHERE Id(n) = 0 DELETE n;

Delete Relationship
  MATCH (n:Node)-[r:Relationship]-(n:Node) DELETE r;

Delete Relationship by id
  MATCH ()-[r]-() WHERE id(r)={id} DELETE r

Delete All Nodes and Relationships
pre 2.3.0
  MATCH (n) OPTIONAL MATCH (n)-[r]-() DELETE n,r;

2.3.0 +
  MATCH (n) DETACH DELETE n

Delete a node and all relationships attached.
  MATCH (n) WHERE id(n) = 1  DETACH DELETE n

Delete a property from a node
  MATCH (n:Node) WHERE id(n) = 0 REMOVE n.oldProperty RETURN n;

Add/Remove label from node
  MATCH (n) WHERE ID(n) = 1 REMOVE n:Lable1 SET n:Label2

== Neo4J Export ==

Export database as Cypher
  bin/neo4j-shell -c dump > ./filename.cypher

Import database as Cypher
  bin/neo4j-shell -file ./filename.cypher

Execute database statement
  bin/neo4j-shell -c "MATCH (n) OPTIONAL MATCH (n)-[r]-() DELETE n,r;"