Show me all distinct kinds of injuries.
select distinct injury from injury_accident
What about those happened after season 2010?
select distinct t1.injury from injury_accident as t1 join game as t2 on t1.game_id = t2.id where t2.season > 2010
How many are there?
select count(distinct t1.injury) from injury_accident as t1 join game as t2 on t1.game_id = t2.id where t2.season > 2010