I have 3 tables:
Race - id PKRacer - id PK - rankWinner - id PK - race_id FK(Race.id) - racer_id FK(Racer.id) - rank - prize UNIQUE CONSTRAINT (race_id, rank)Racer.rank is a non-unique values, as some players can tie to a rank. I try to have records in Winner to have its rank match the Racer.rank that it references to. The unique constraint is to ensure that each race has only one 1st place.
The integrity between Winner.rank and Racer.rank is to enforcing if we later update Racer.rank, we will have to update the value in Winner as well, or remove that Winner row. How can I enforce that matching?
Other separate question:- Is there a keyword that describe what I try to accomplish? I try to search with "referential integrity", "foreign constraint non-unique"... but none gets me to satified result.
