Constraints in Neo4j
A iFull definition for constraint (opens in a new tab)A rule the database enforces on every node or relationship with a given label or type, rejecting any write that breaks it. is implemented internally as an index. It is used to constrain what is added to the graph.
You can define different types of constraint that apply to iFull definition for node (opens in a new tab)A vertex in a graph. In a property graph it can carry labels and properties. with a specific iFull definition for label (opens in a new tab)A tag on a node that groups it with other nodes of the same kind. A node can carry more than one. or iFull definition for relationship (opens in a new tab)A named, directed connection between two nodes. Every relationship has a type, a start node and an end node. of a type, including:
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