Neo4j create node - neo4j tutorial - graph database
How to Create Node using Cypher in Neo4j?
- To create nodes using Cypher, use the CREATE statement.
- The statement consists of CREATE, followed by the details of the node or relationship that you're creating.
Example
- Let's create a music database that contains band names and their albums.
- The first band will be called Strapping Young Lad. So we will create an Artist node and call it Strapping Young Lad. Our first node will look something like this.
- Note that the name is cut short only because it's too long to be displayed on the node.
- The full name is still stored in the database.
- Here's the Cypher CREATE statement to create the above node:
CREATE (a:Artist { Name : "Strapping Young Lad" })
- This Cypher statement creates a node with an Artist label. The node has a property called Name, and the value of that property is Strapping Young Lad.
- The a prefix is a variable name that we provide. We could've called this anything. This variable can be useful if we need to refer to it later in the statement (which we don't in this particular case).
- Note that a variable is restricted to a single statement.
- So go ahead and run the above statement in the Neo4j browser. The statement will create the node.
- Once Neo4j has created the node, you should see a message like
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Displaying the Node
- The CREATE statement creates the node but it doesn't display the node.
- To display the node, you need to follow it up with a RETURN statement.
- Let's create another node. This time it will be the name of an album. But this time we'll follow it up with a RETURN statement.
CREATE (b:Album { Name : "Heavy as a Really Heavy Thing", Released : "1995" })
RETURN b
- The above statement creates a node with an Album label. It has two properties: Name and Released.
- Note that we return the node by using its variable name (in this case b).
Creating Multiple Nodes
- You can create multiple nodes at once by separating each node with a comma:
CREATE (a:Album { Name: "Killers"}), (b:Album { Name: "Fear of the Dark"})
RETURN a,b
- Or you can use multiple CREATE statements:
CREATE (a:Album { Name: "Piece of Mind"})
CREATE (b:Album { Name: "Somewhere in Time"})
RETURN a,b