如何合并 Cypher 中三个现有节点之间的关系？

Question

节点 A、B 和 C 已存在。我想合并A、B和C之间的节点Z。我知道我可以在以下两个节点之间合并： MERGE (A)-[:HAS]->(Z)<-[:SENT]-(B)。但是，我很好奇我如何也可以与C 合并？

                              +-------+
                              |       |
                              |  A    |
                              |       |
                              +---+---+
                                  |
                                  |
                                  |
                                  |
                                  |
                                  | HAS
                                  |
                                  |
                                  |
                                  |
                             +----+-----+
                             |          |
                             |    Z     |
                             |          |
                             |          |
                             +----------+
                             |          |
                             |          |
                             |          |              +-----------+
+----------+                 |          |              |           |
|          |                 |          |              |           |
|          |                 |          |              |           |
|   B      +-----------------+          +--------------+    C      |
|          |        SENT                      RECV'D   |           |
|          |                                           |           |
|          |                                           |           |
+----------+                                           +-----------+

Answer 1

您可以匹配所有节点并保留标识符，然后重新使用这些标识符。

MATCH (a:Node {name: 'A'})
MATCH (b:Node {name: 'B'})
MATCH (c:Node {name: 'C'})
MERGE (z:Node {name: 'Z'})
MERGE (a)-[:HAS]->(z)
MERGE (b)-[:SENT]->(z)
MERGE (c)-[:RECEIVED]->(z)