toUpper(gsr.isrc) WITH toUpper(gsr.isrc) AS isrc, collect(gsr) AS gsrs // Find a normalized ISRC node if it exists, and add it to the list OPTIONAL MATCH (gsr:GlobalSoundRecording { isrc: isrc }) WITH isrc, CASE WHEN gsr IS NULL THEN gsrs ELSE [gsr] + gsrs END AS gsrs // Merge together GSRs CALL apoc.refactor.mergeNodes( gsrs, { properties: "discard", mergeRels: true } ) YIELD node // Finally, make sure that we end up with the normalized ISRC on the node SET node.isrc = isrc; ]]>