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-- first and last season (not full, any entry counts) for each driver
CREATE VIEW first_last_season AS
SELECT MIN(races.year) AS first_season, MAX(races.year) AS last_season,
drivers.driverId AS driverId,
CONCAT(drivers.forename, ' ', drivers.surname) AS driver
FROM races
JOIN results ON results.raceId = races.raceId
JOIN drivers drivers.driverId = results.driverId
GROUP BY drivers.driverId;
-- earliest and latest birth dates in each season among all the drivers
-- entered in a season, so in 1991 Schumacher is the youngest,
-- despite Hakkinen being younger than him on their respective debut races
CREATE VIEW youngest_oldest_birth_dates_in_season AS
SELECT races.year AS year,
MIN(drivers.dob) AS oldest, MAX(drivers.dob) AS youngest
FROM results
JOIN drivers ON drivers.driverId = results.driverId
JOIN races ON results.raceId = races.raceId
GROUP BY races.year;
-- youngest and oldest drivers in each season
CREATE VIEW youngest_oldest_in_season AS
SELECT tmp.year AS year,
tmp.oldest AS oldest,
CONCAT(d1.forename, ' ', d1.surname) AS oldest_name,
tmp.youngest AS youngest,
CONCAT(d2.forename, ' ', d2.surname) AS youngest_name
FROM youngest_oldest_birth_dates_in_season tmp
JOIN drivers d1 ON d1.dob = tmp.oldest
JOIN drivers d2 ON d2.dob = tmp.youngest;
-- list of drivers who were youngest in their debut season
CREATE VIEW youngest_in_first_season AS
SELECT first_last_season.first_season AS first_season,
first_last_season.driver AS driver
FROM first_last_season
JOIN youngest_oldest_in_season
ON youngest_oldest_in_season.year = first_last_season.first_season
AND youngest_oldest_in_season.youngest_name = first_last_season.driver;
-- list of drivers who were oldest in their last season
CREATE VIEW oldest_in_last_season AS
SELECT first_last_season.last_season AS last_season,
first_last_season.driver AS driver
FROM first_last_season
JOIN youngest_oldest_in_season
ON youngest_oldest_in_season.year = first_last_season.last_season
AND youngest_oldest_in_season.oldest_name = first_last_season.driver;
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