本文介绍了密码:从集合中提取唯一值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有
MATCH (x)-[rels*]->(y) RETURN extract( r in rels | r.property) as collected其中,collected是路径上所有关系的属性的集合,例如[null, 4, null, 4]或[1, 3, 3, 1].
where collected is a collection of properties of all relationships along the path, such as [null, 4, null, 4] or [1, 3, 3, 1].
如何进一步从collected中仅提取其唯一值? 例如,[null, 4, null, 4]会变成[null, 4]
How can I further extract from collected only its unique values? For example, [null, 4, null, 4] would change into [null, 4]
推荐答案请尝试以下操作:
MATCH (x)-[rels*]->(y) UNWIND rels AS rel RETURN COLLECT( distinct rel.property) AS collected更多推荐
密码:从集合中提取唯一值
发布评论