How to update Nodes within a random manner in Neo4j -

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how can update random set of nodes in neo4j. tried folowing:

match (firstgraph) id(firstgraph) id return firstgraph.name, firstgraph.version,id(firstgraph) order rand(); match (g1:firstgraph) id(g1)=id set g1.version=5

my idea random set update it, got error:

expected 1 statement per query got: 2

thanks help.

let's find out what's problem here, first of all, error

expected 1 statement per query got: 2

this coming query, if check it, see did 2 queries in same sentence, that's why error.

match (firstgraph) id(firstgraph) id  return firstgraph.name, firstgraph.version,id(firstgraph) order rand(); match (g1:firstgraph) id(g1)=id set g1.version=5

this not query, because can't use ; in query sentence, it's query end marker, can't query after this, can use union:

match (firstgraph) id(firstgraph) id  return      firstgraph.name, firstgraph.version,id(firstgraph) order rand()  union  match (g1:firstgraph) id(g1)=id set g1.version=5

also, if want match random set of nodes, can (this example 50% chances each node):

match (node) rand() > 0.5 return node

and whatever want node using with


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