USING PERIODIC COMMIT 500
LOAD CSV WITH HEADERS from "file:///track_ex.csv" as row
OPTIONAL MATCH (p:Product {productId: toInteger(row.RELEASE_ID)})
MERGE (t:Track {trackId: toInteger(row.ID)})
    ON CREATE SET
        t.name = row.TRACK_NAME
MERGE (p)-[r:INCLUDES]->(t);