​​Neo4j 查询某标签节点个数语句 删除某标签全部节点语句​​


查询:MATCH (n:标签名) RETURN count(n)

删除:MATCH (n:标签名) DELETE n



python 连接 neo4j


#coding:utf-8 from py2neo import Graph,Node,Relationship   # 根据属性进行查询 def findOne(label, propertyName, propertyValue):     foundNode = graph.find_one(         label = label,         property_key = propertyName,         property_value = propertyValue     )      return foundNode   graph = Graph("http://localhost:7474", username="neo4j", password="123456")  #创建节点 # temp_node = Node('Person', name='张红')# 节点标签名,节点属性 # graph.create(temp_node)  #建立关系 # fa = findOne('Person', 'name', '张海洋') # da = findOne('Person', 'name', '张红') # if(fa != None and da!= Node): #     fa_da = Relationship(fa, 'call', da) #     fa_da['count'] = 1 #     graph.create(fa_da) # #     da_fa = Relationship(da, 'call', fa) #     da_fa['count'] = 3 #     graph.create(da_fa)  print findOne('call','count','1')






查询:MATCH (n:标签名) RETURN count(n)

删除:MATCH (n:标签名) DELETE n