Neo4J用Cypher刪除字段值不帶CSV的節點

Question

您好，我想刪除所有帶有標籤GRAPH_OBJECT的節點，它們的屬性值（讓我們稱之爲myprop）不在我列出的數值列表中CSV或文本文件。

我如何用Cypher完成這項工作？

Answer 1

這應該工作。

// load csv 
LOAD CSV FROM "file://values.txt" AS row 
// create a collection of the first column turned into numeric values 
WITH collect(toInt(row[0])) AS blacklist 
// find the nodes 
MATCH (node:GRAPH_OBJECT) 
// for any of the properties of the node, if it's value is in our blacklist 
WHERE ANY(property in keys(node) WHERE node[property] IN blacklist) 
// delete node and relationships 
DETACH DELETE node; 

Answer 2

與邁克爾飢餓的代碼開始，並與您的評論的更新，我相信這應該工作：

// load csv 
LOAD CSV FROM "file://values.txt" AS row 
// create a collection of the first column turned into numeric values 
WITH collect(toInt(row[0])) AS whitelist 
// find the nodes 
MATCH (node:GRAPH_OBJECT) 
// for any of the properties of the node, if it's value is in our blacklist 
WHERE NOT node.myprop IN whitelist) 
// delete node and relationships 
DETACH DELETE node; 

第一個WHERE子句中邁​​克爾的代碼（WHERE ANY(property in keys(node)）似乎只是有這麼每個屬性上該節點可以搜索，所以如果你只需要搜索myprop，那麼這不應該需要。