Deleting a node property

We briefly talked about NULL values in the previous chapter. In Neo4j, NULL values are not saved in the properties list. An absence of a property means it's null. So, deleting a property is as simple as setting it to a NULL value:

MATCH (n {id: 1})
SET n.age = NULL
RETURN n

Here's the result:

{
  "name": "Another name",
  "address": "Earth, Universe",
  "id": 1,
  "gender": "F"
}

The other solution is to use the REMOVE keyword:

MATCH (n {id: 1})
REMOVE n.address
RETURN n

The result would be as follows:

{
 "gender": "F",
 "name": "Another name",
 "id": 1
}

If you want to remove all properties from the node, you will have to assign it an empty map like so:

MATCH (n {id: 2})
SET n = {}
RETURN n