How can I get all the property-names of different nodes?

Question

I want to get the effect like using Oracle.

For example,I hava two tables: Student , Tearcher . I can get all the column names of the two tables using SQL.

Now, I have two nodes: one with label Student with Name, age, sex, grade properties, another with label Teacher and Name, sex, salary properties.

Can I get all the property names with Neo4jClient using Cypher?

Thx Z.Tom

Answer 1

You could use the keys function, if you want to get the properties by label you could match accordingly with a query like:

MATCH (a:Student) WITH keys(a) as k UNWIND k as x RETURN DISTINCT x

Will return all the existing properties on the nodes labeled as Student

Explanation:

• The query matches all the nodes labeled as Student .
• It extracts the property keys of the nodes using keys , then passes them by as arrays WITH
• UNWIND catches the arrays and splits them into single rows
• RETURN DISTINCT returns the property names as rows avoiding duplicates

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Example

On C# using Neo4jClient the code to execute that query would be something like:

client = new GraphClient(new Uri(connString), dbuser, dbpass);
client.Connect();
var results = (Result)client.Cypher.Match("(a:Student)")
                                   .With("keys(a) as k")
                                   .Unwind("k as x")
                                   .ReturnDistinct<Result>("x")
                                   .Results.ToList()

Having a class setup for results like this:

public class Result
{
    public string x { get; set; }
}