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Update Nodes using UPDATE  

Modify properties on existing elements. 
::UPDATE({<properties_list>})

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Example 1: Updating a person’s profile

QUERY UpdateUser(user_id: ID, new_name: String, new_age: U32) =>
    updated <- N<Person>(user_id)::UPDATE({
        name: new_name,
        age: new_age
    })
    RETURN updated

QUERY CreatePerson(name: String, age: U32) =>
    person <- AddN<Person>({
        name: name,
        age: age,
    })
    RETURN person
You only need to include the fields you want to change. Any omitted properties stay the same.
Here’s how to run the query using the SDKs or curl 
from helix.client import Client

client = Client(local=True, port=6969)

alice = client.query("CreatePerson", {
    "name": "Alice",
    "age": 25,
})[0]["person"]

updated = client.query("UpdateUser", {
    "user_id": alice["id"],
    "new_name": "Alice Johnson",
    "new_age": 26,
})[0]["updated"]

print("Updated user:", updated)
The following examples would not work as the types don’t match
QUERY UpdateUser(userID: ID) =>
    // No email field in Person node
    updatedUsers <- N<Person>(userID)::UPDATE({ email: "john@example.com" })

    // Age as string instead of U32
    updatedUsers <- N<Person>(userID)::UPDATE({ age: "Hello" })

    RETURN updatedUsers