user: Question: What is the minimum number of the BMW Championship tournament.
Columns: ['No.', 'Date', 'Tournament', 'Winning score', 'To par', 'Margin of victory', 'Runner(s)-up']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Oct 5, 2008', 'Turning Stone Resort Championship', '72-68-70-69=279', '−9', '1 stroke', 'Robert Allenby']
SQL:

assistant: SELECT MIN("No.") FROM "Table" WHERE "Tournament" = 'BMW Championship';