Graph storage in Neo4j
Before we look into the Cypher syntax to query the data, it is important to understand how the data is persisted as a graph. Data diagram representations give a good idea about how the Cypher queries can be written using the data model. We will take a look at a data diagram and see how it helps us with querying:
Figure 2.1 – Sample graph data diagram
This diagram shows how the data is stored in the database. Each node represents one entity that knows what relationship entities it is connected to and whether they are incoming or outgoing; each property is an entity that is associated with a node or relationship. Each relationship entity knows what nodes it is connected to and the direction of the relationship.
The preceding diagram tells us that a person named Tom owns two addresses. This person lives at one address and rents the other one. A person named Shelley lives at an address that is rented. If you read this diagram from...
