Neo4J Lab Create Node and Relationships Day 1

 Neo4J lab - Running Beginner Query/ Code

Work with  Nodes

//Create a Node:

• CREATE (n)

//View the nodes

• match (n) return (n)

//Create a Node and view results:

• CREATE (n)
• with n
• match (n) return(n)

//Creating multiple nodes is done by separating them with a comma.

• CREATE (n), (m)

//Create a node with a label:

//To add a label when creating a node, use the syntax below:

• CREATE (n:Person)
• with n
• match (n) return(n)

//Create a node with multiple labels:

//To add labels when creating a node, use the syntax below. In this case, we add two labels.

• CREATE (n:Person:Swedish)

//Create node and add labels and properties:

//When creating a new node with labels, you can add properties at the same time.

• CREATE (n:Person {name: 'Andy', title: 'Developer'})

//Return created node:

//Creating a single node is done by issuing the following query:

• CREATE (a {name: 'Andy'})
• RETURN a.name

Create Relationships

• Create a relationship between two nodes:
• To create a relationship between two nodes, we first get the two nodes. Once the nodes are loaded, we simply create a relationship between them.

// Create label and setup relationship

• Create (a:person{name:'sumit'})
• Create (b:person{name:'amit'})
• with a , b
• MATCH // set condition
•   (a:person),
•   (b:person)
• WHERE a.name = 'sumit' AND b.name = 'amit'
• CREATE (a)-[r:FRIENDS]->(b) //set relationship
• RETURN type(r)

 

//Create a relationship and set properties

//Setting properties on relationships is done in a similar manner to how it’s done when creating nodes. //Note that the values can be any expression.

• // Create label and setup relationship
• Create (a:person{name:'sumit'})
• Create (b:person{name:'amit'})
• with a , b
• MATCH  // set condition
•   (a:person),
•   (b:person)
• WHERE a.name = 'sumit' AND b.name = 'amit'
• //set relationship
• CREATE (a)-[r:frnds {name: a.name + '<->' + b.name}]->(b)
• RETURN type(r), r.name

//Create a full path

//When you use CREATE and a pattern, all parts of the pattern that are not already in scope at this time will be created. 

//This query creates three nodes and two relationships in one go, assigns it to a path variable, and returns it.

• CREATE p = (:person {name:'andy'})-[:WORKS_AT]->(:company {name: 'Neo4j'})<-[:WORKS_AT]-(:person {name: 'Michael'})
• RETURN p