09. NEO4j CQL REMOVE

发表于 2022-10-27 17:30:16 by 月小升

NEO4j CQL REMOVE使用简介

REMOVE用来移除属性和标签

DELETE用来删除节点和关系

CREATE (:Person:Actor:Director {name: '周星驰', born: 1962})
CREATE (:Person:Actor {name: '吴孟达', born: 1952})

MATCH (p1:Person{name:'周星驰'}), (p2:Person{name:'吴孟达'}) 
CREATE (p1)-[:KNOWS{since:[1980]}]->(p2)

1. NEO4j CQL REMOVE 移除一个属性

MATCH (a {name: '周星驰'}) 
REMOVE a.born 
RETURN a.name, a.born

│"a.name"│"a.born"│
╞════════╪════════╡
│"周星驰"   │null    │

2. NEO4j CQL REMOVE 移除一个标签

MATCH (n {name: '吴孟达'}) REMOVE n:Actor RETURN n.name, labels(n)
│"n.name"│"labels(n)"│
╞════════╪═══════════╡
│"吴孟达"   │["Person"] │

3. NEO4j CQL REMOVE 移除多个标签

MATCH (n {name: '周星驰'}) REMOVE n:Actor:Director RETURN n.name, labels(n)
"n.name"│"labels(n)"│
╞════════╪═══════════╡
│"周星驰"   │["Person"] │

4. NEO4j CQL REMOVE 移除关系上的属性

MATCH (n:Person) RETURN n LIMIT 25

鼠标点击到KNOWS这个关系上，看到有个属性since [1980]

MATCH (n {name:'周星驰'})-[r:KNOWS]->() 
REMOVE r.since
RETURN r

返回

{
  "identity": 0,
  "start": 2,
  "end": 3,
  "type": "KNOWS",
  "properties": {
  }
}

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