合并 Neo4j 中的现有记录，删除重复项，保持关系

Question

CREATE出于性能原因，我已经导入了数百万条记录，现在我想将MERGE这些记录放在一起，并保持所有关系完好无损。

有任何想法吗？

编辑：

MATCH (c1:company), (c2:company) 
WITH c1, c2 
WHERE c1.name = c2.name 
SET c1=c2

是我正在寻找的类型。

Answer 1

如果你想在 cypher 中合并节点，你可以这样做：

MATCH (c:Company)
WITH c.name as name, collect(c) as companies, count(*) as cnt
WHERE cnt > 1
WITH head(companies) as first, tail(companies) as rest
LIMIT 1000
UNWIND rest AS to_delete
MATCH (to_delete)<-[r:WORKS_AT]-(e:Employee)
MERGE (first)<-[:WORKS_AT]-(e)
DELETE r
DELETE to_delete
RETURN count(*);

见：http : //www.neo4j.org/graphgist?dropbox-14493611%2Fmerge_nodes.adoc