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25 lut 2017 · I know I can create a unique constraint on a single property with Cypher like CREATE CONSTRAINT ON (p:Person) ASSERT p.name IS UNIQUE. But I was wondering whether it is possible to create a unique constraint which involves multiple properties. If so, how?
Create UNIQUE Constraint. Neo4j CQL provides "CREATE CONSTRAINT" command to create unique constraints on node or relationship properties. Syntax. Following is the syntax to create a UNIQUE constraint in Neo4j. MATCH (root {name: "Dhawan"}) CREATE UNIQUE (root)-[:LOVES]-(someone) RETURN someone Example
Constraints are created with the CREATE CONSTRAINT command. When creating a constraint, it is recommended to provide a constraint name. This name must be unique among both indexes and constraints. If a name is not explicitly given, a unique name will be auto-generated.
Neo4j offers several constraints to ensure the quality and integrity of data in a graph. The following constraints are available in Neo4j: Property uniqueness constraints ensure that the combined property values are unique for all nodes with a specific label or all relationships with a specific type.
Constraints are created with the CREATE CONSTRAINT command. When creating a constraint, it is recommended to provide a constraint name. This name must be unique among both indexes and constraints. If a name is not explicitly given, a unique name will be auto-generated.
We will discuss Creating UNIQUE Constraint operations with examples in this chapter. Neo4j CQL has provided "CREATE CONSTRAINT" command to create Unique constraints on NODE's or Relationship's properties. It is a Neo4j CQL keyword. 2. It is the label name of a Node or a Relationship. 3. It is a Neo4j CQL keyword. 4.
In Neo4j, you can create uniqueness constraints and property existence constraints. Uniqueness Constraint Specifies that the property must contain a unique value (i.e. no two nodes with an Artist label can share a value for the Name property.)
