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Neo4j: Graph Database
Create a node
CREATE (); CREATE (:Label1); CREATE (:Label1:Label2:LabelN); CREATE (:Label1 {name: "James Bond"}) CREATE (n) RETURN n; CREATE (n:Label1) RETURN n; CREATE (n:Label1:Label2:LabelN) RETURN n; CREATE (:Label1 {name: "James Bond", ...}) RETURN n;
Query nodes
MATCH (n) RETURN n; MATCH (n) RETURN n WHERE ID(n)=1; MATCH (n) RETURN n LIMIT 25; MATCH (n:Label1) RETURN n LIMIT 25;
Create a relationship
CREATE (:Person {name: "Andy"})-[:KNOWS]->(:Person {name: "John"); MATCH (a:Person) WHERE a.name="Andy" MATCH (b:Person) WHERE b.name="John" CREATE (a)-[:KNOWS]->(b);
Query by relationship
MATCH p=()-[:RELATIONSHIP]->() RETURN p; MATCH p=()-[:RELATIONSHIP*]->() RETURN p; MATCH p=()-[:RELATIONSHIP*1]->() RETURN p; MATCH p=()-[:RELATIONSHIP*1..1]->() RETURN p; MATCH p=()-[r:RELATIONSHIP]->() WHERE r.condition=value RETURN p; MATCH p=()-[r:RELATIONSHIP]->(b) WHERE r.condition=value AND b.condition=value RETURN p;
Query relationship by node
MATCH (n:NODE1)-(r)-(b) RETURN n, r, b; MATCH (n:NODE1)-(r)-(b) RETURN *; MATCH (n:NODE1)-(r*1)-(b) RETURN *; MATCH (n:NODE1)-(r*1..1)-(b) RETURN *;
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