在单个查询中计算入度和出度

Question

我可以使用以下查询 "In Degree" 成功：

match a=(p:Person)-->(q:Person{Address:'0xa1e4380a3b1f749673e270229993ee55f35663b4'})
RETURN count(a) as In_Degree

我可以使用以下查询 "Out Degree" 成功：

match a=(p:Person)<--(q:Person{Address:'0xa1e4380a3b1f749673e270229993ee55f35663b4'})
RETURN count(a) as Out_Degree

但是当我将两者合并并编写如下查询时，Cypher 给出的结果是 "Out Degree"。

match a=(p:Person)-->(q:Person{Address:'0xa1e4380a3b1f749673e270229993ee55f35663b4'}),b=(r:Person)<--(s:Person{Address:'0xa1e4380a3b1f749673e270229993ee55f35663b4'})
RETURN count(a) as In_Degree, count(b) as Out_Degree

我是不是漏掉了什么？有人可以帮我解决这个问题吗？

Answer 1

你能试试这个查询吗:

MATCH (p:Person{Address:'0xa1e4380a3b1f749673e270229993ee55f35663b4'})
RETURN size((p)<--(:Person)) AS In_Degree, size((p)-->(:Person)) AS Out_Degree

干杯。