1.使用關鍵字INDEX ON為節點的屬性name創建一個普通的索引
CREATE INDEX ON :Person(name)
輸出：
Added 1 index, completed after 46 ms.
2.使用索引來查詢
MATCH (n:Person) WHERE n.name IN ["a","b"] RETURN n as Person
得到圖：
3.顯式使用索引查詢
MATCH(n:Person)
USING INDEX n:Person(name)
WHERE n.name = 'a'
RETURN n as Person
4.用DROP關鍵字刪除一個已經存在的索引
DROP INDEX ON :Person(name)
Removed 1 index, completed after 1 ms.
