When working with different graphs in Neo4j, it is often important to count the number of relationships between different nodes. Below are examples of common relationship counting tasks. The data for these examples can be found here and the script to load this data into Neo4j can be found here. Counting Total Relationships (Edges) MATCH
Deleting Nodes and Relationships Deleting all nodes and relationships in a Neo4j database is very simple. Here is an example that does just that: MATCH (n) DETACH DELETE n; The DETACH keyword specifies to remove or “detach” all relationships from a particular node before deletion. If relationships exist on a node at the time deletion
Neo4j is a popular graph database which provides an easy way to import text files using the Cypher query language and a LOAD CSV clause. LOAD CSV by default expects files to be delimited by commas. In order to specify another field delimiter, add FIELDTERMINATOR to the LOAD CSV clause. For example:
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USING PERIODIC COMMIT LOAD CSV WITH HEADERS FROM "file:///twitter_relationships_top_100.txt" AS line FIELDTERMINATOR '\t' CREATE (u:User {username: line.username}); |
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