Table: hamilton_croatia_club
Columns: club
league
venue
established
championships

Question: What is the Established date of the Ontario Provincial Junior A Hockey League with more than 1 Championship?
SQL: SELECT COUNT("established") FROM hamilton_croatia_club WHERE "league" = 'ontario provincial junior a hockey' AND "championships" > 1

Question: What Venue has more than 1 Championship and was Established after 1957?
SQL: SELECT "venue" FROM hamilton_croatia_club WHERE "championships" = 1 AND "established" > 1957

Question: With less than 1 Championship, what es the Established date of the Niagara Rugby Union League?
SQL: SELECT SUM("established") FROM hamilton_croatia_club WHERE "championships" < 1 AND "league" = 'niagara rugby union'

Question: What is the Established date of the Brian Timmis Stadium?
SQL: SELECT COUNT("established") FROM hamilton_croatia_club WHERE "venue" = 'brian timmis stadium'