Nodes and Labels¶

Nodes are the fundamental entities in your graph. Each node can have one or more labels and any number of properties.

Creating Nodes¶

-- Create a node with a single label
INSERT (:Person {name: 'Alice', age: 30})

-- Create a node with multiple labels
INSERT (:Person:Employee {name: 'Bob', department: 'Engineering'})

-- Create multiple nodes
INSERT (:Person {name: 'Carol'})
INSERT (:Person {name: 'Dave'})

Labels¶

Labels categorize nodes and enable efficient querying:

-- Find all Person nodes
MATCH (p:Person)
RETURN p.name

-- Find nodes with multiple labels
MATCH (e:Person:Employee)
RETURN e.name, e.department

Node Properties¶

Nodes can have any number of properties:

INSERT (:Person {
    name: 'Alice',
    age: 30,
    email: 'alice@example.com',
    active: true,
    scores: [95, 87, 92]
})

Updating Nodes¶

-- Add or update properties
MATCH (p:Person {name: 'Alice'})
SET p.age = 31, p.updated_at = '2024-01-15'

-- Remove a property
MATCH (p:Person {name: 'Alice'})
REMOVE p.email

Deleting Nodes¶

-- Delete a node (must have no edges)
MATCH (p:Person {name: 'Alice'})
DELETE p

-- Delete a node and all its edges
MATCH (p:Person {name: 'Alice'})
DETACH DELETE p