Table: steaua_player_stats
Columns: country
player_name
period
position
matches
goals

Question: How many goals were scored by the player who played 17 matches?
SQL: SELECT "goals" FROM steaua_player_stats WHERE "matches" = '17'

Question: What is the name of the player who played in 2009 only?
SQL: SELECT "player_name" FROM steaua_player_stats WHERE "period" = '2009'

Question: How many goals have been scored by Tiago Gomes?
SQL: SELECT "goals" FROM steaua_player_stats WHERE "player_name" = 'Tiago Gomes'