SELECT player ,  number_of_matches ,  SOURCE FROM injury_accident WHERE injury != 'Knee problem'
What are the player name, number of matches, and information source for players who do not suffer from injury of 'Knee problem'?
SELECT player , number_of_matches , SOURCE FROM injury_accident WHERE injury ! = 'Knee problem '
select player , number_of_matches , source from injury_accident where injury ! = value
What are the player name , number of matches , and information source for players who do not suffer from injury of 'Knee problem ' ?