问题
A company provides transport services to high-ranked staffs. There are 3 tables: DRIVERS, VEHICLES, STAFFS.
DRIVERS - license number [PK] - name - language spoken - ... (and so on..)
VEHICLES - vehicle ID [PK] - registration number - model - colour - ... and so on...
STAFFS - staff ID [PK] - name - position name - ... and so on....
I want to create a new table called ORGANIZE whereby, it will assign a driver and a vehicle to match the needs of the staff. what will be the PK and FKs?
回答1:
I've written a more exhaustive answer over at your other question.
normalization of database
If you need to match a driver and a vehicle to a staff member, then you can do a three column composite pk with fk associations with the three other tables. You'll need to wire up your own logic to actually do the organization... this would not be done in the database, the db should just retain the results of the organization.
来源：https://stackoverflow.com/questions/12601416/what-is-the-pk-and-fk-i-should-assign-to-my-table