1.生成如图所示的图数据：
节点标签为Person,节点具有五类属性分别为：name,eye,age,array,对应上节所说的类型
关系存在两类：KNOWS和MARRIED
生成语句：
-----------1.创建节点
CREATE(alice:Person{name:'Alice',eyes:'brown',age:38})
CREATE(charlie:Person{name:'Charlie',eyes:'green',age:53})
CREATE(bob:Person{name:'Bob',eyes:'blue',age:25})
CREATE(daniel:Person{name:'Daniel',eyes:'brown'})
CREATE(eskil:Person{name:'Eskil',eyes:'blue',age:41,array:['one','two','three']})
-----------2.创建关系
CREATE(alice)-[:KNOWS]->(daniel)-[:KNOWS]->(daniel)
CREATE(alice)-[:KNOWS]->(bob)-[:KNOWS]->(daniel)
CREATE(bob)-[:MARRIED]->(eskil)
查询三类case查询语句：
#case查询1
MATCH(n:Person)
RETURN
CASE n.eyes
WHEN 'blue'
THEN 1
WHEN 'brown'
THEN 2
ELSE 3 END AS result
#case查询2
MATCH(n:Person)
RETURN
CASE
WHEN n.eyes ='blue'
THEN 1
WHEN n.age <40
THEN 2
ELSE 3 END AS result
#case查询2
MATCH(n:Person)
RETURN n.name,
CASE n.age
WHEN n.age IS NULL THEN -1
ELSE n.age -10 END AS age_10_years_ago
结果展示：