neo4j nosql图数据库学习

neo4j 文档：https://neo4j.com/docs/getting-started/current/cypher-intro/

1.索引 

#　给某类标签节点的属性添加索引

　　CREATE INDEX ON : <label_name> (<property>)

＃　删除某类标签节点属性索引
　　DROP INDEX ON : <label_name> (<property>)

#　查看索引
　　:schema

＃　对属性创建唯一约束
　　CREATE CONSTRAINT ON (<label_name>)　　ASSERT <property_name> IS UNIQUE
　　　　例如：create constraint on (cc:cell) assert cc.mobile is unique

＃ 删除唯一约束
　　DROP CONSTRAINT ON (<label_name>)    ASSERT <property_name> IS UNIQUE 
　　　　例如：drop constraint on (cc:cell) assert cc.mobile is unique

# 创建联合索引
　　CREATE INDEX ON :Person(age, country)

# 删除联合索引
　　DROP INDEX ON :Person(age, country)

文档：https://neo4j.com/docs/cypher-manual/3.5/schema/index/