apoc.nodes.collapse
Procedure

Prior to the release of APOC 2025.07, this procedure was restricted on on-premise instances. To use it on an older version, it must be unrestricted. For more details, see Installation → Load and unrestrict.

Details
Syntax	`apoc.nodes.collapse(nodes [, config ]) :: (from, rel, to)`
Description	Merges `NODE` values together in the given `LIST<NODE>`. The `NODE` values are then combined to become one `NODE`, with all labels of the previous `NODE` values attached to it, and all `RELATIONSHIP` values pointing to it.
Input arguments	Name	Type	Description
	`nodes`	`LIST<NODE>`	The list of node values to merge.
	`config`	`MAP`	`{ mergeRels :: BOOLEAN, selfRef :: BOOLEAN, produceSelfRef = true :: BOOLEAN, preserveExistingSelfRels = true :: BOOLEAN, countMerge = true :: BOOLEAN, collapsedLabel :: BOOLEAN, singleElementAsArray = false :: BOOLEAN, avoidDuplicates = false :: BOOLEAN, relationshipSelectionStrategy = "incoming" :: ["incoming", "outgoing", "merge"] properties :: ["overwrite", "discard", "combine"] }`. The default is: `{}`.
Return arguments	Name	Type	Description
	`from`	`NODE`	The recently collapsed virtual node.
	`rel`	`RELATIONSHIP`	A relationship connected to the collapsed node.
	`to`	`NODE`	A node connected to the other end of the relationship.

More documentation of apoc.nodes.collapse