Cypher - UNWIND UNION

UNWIND   将一个列表展开为一个行的序列

// 指定一个集合，行展开

 unwind [1,2,3] as x
 return x

//集合去重

with [1,1,2,2] as coll
unwind coll as x
with distinct x
return collect(x) as set

union 用于将多个查询结果组合起来
  --查询到的列名和列数必须彻底一致
  -- all union 会包含全部结果。而 union 会去重

match (u:User{id:1})
return u.name as name
union all
match (o:User{id:8})
return o.name as name