walk(node) 返回一个生成器且只包含一个node labels() 返回node的标签的集合 has_label(label) node是否有这个标签 add_label(label) 给node添加标签 remove_label(label) 删除node的标签 clear_labels() 清楚node的所有标签 update_labels(labels) 添加多个标签,注labels为可迭代的 其中连接的属性有: hash(relat...
walk(node) 返回一个生成器且只包含一个node labels() 返回node的标签的集合 has_label(label) node是否有这个标签 add_label(label) 给node添加标签 remove_label(label) 删除node的标签 clear_labels() 清楚node的所有标签 update_labels(labels) 添加多个标签,注labels为可迭代的 其中连接的属性有: hash(relat...
return x,y union和union all match (x:MALE)-[:FRIEND]->() return x.name, labels(x) union match (x:FEMALE)-[:FRIEND]->() return x.name, labels(x) MATCH (x{name:""})--(y)--() with x create(n:代理{name:"",age:23})-[r:children]->(x) RETURN n,r,x 使用别名 with '...
3.使用索引 当用到索引的列的时候,索引会自动使用,无须指明 4.创建约束 Neo4j通过约束来保证数据的完整性 唯一性约束是对一类节点的一个属性设置的 4.1创建唯一性约束 使用IS UNIQUE语法创建约束,它能确保数据库中拥有特定标签和属性值的节点是唯一的 CREATECONSTRAINTON(book:Book) ASSERT book.isbnISUNIQUE 4.2删...
Match(n:标签名称) remove n.属性名称 1. 6.删除某一类标签(bingo) AI检测代码解析 #It would have 4 labels: Movie, Cinema, Film, and Picture.To remove the Picture label from all movies MATCH(m:Movie) REMOVE m:Picture RETURN m 1.
SET (and REMOVE): Set values to properties and add labels on nodes using SET and use REMOVE to remove them. MERGE: Match existing or create new nodes and patterns. This is especially useful together with unique constraints. ...
(n:Person) RETURN count(n);$$neo4j-client -u neo4j -p pass -o result.out -i query.cyp$cat result.out+:export name='Emil' +begin; +MERGE (:Person {name: {name}}); Nodes created: 1 Properties set: 1 Labels added: 1 +commit; +MATCH (n:Person) RETURN count(n); "count(n)"...
of the graph (Similar to what is done in theschema introspection PoCor Apoc Meta) and lists relationships between labels aslabel1_TYPE_label2in the data dictionary, with av$idcolumn for the relationship, andv$label1_idandv$label2_idso that ETL tools can actual join those with the labels....
UWNIND {batch} as row CALL apoc.merge.node(row.labels, {id: row.id} , row.properties) yield node RETURN count(*) 更新关系: UWNIND {batch} as row MATCH (from) WHERE id(n) = row.from MATCH (to:Label) where to.key = row.to CALL apoc.merge.relationship(from, row.type, {id: ...
$NEO4J_HOME/bin/neo4j-shell -path $NEO4J_HOME/data/databases/graph.db/ -c 'MATCH (n) RETURN labels(n), count(*);' +---+ | labels(n) | count(*) | +---+ | ["Shipper"] | 3 | | ["Employee"] | 9 | | ["Region"] | 4 | | ["Customer"] | 93 | | ["Territory"] |...