Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the minimum number of the bmw championship tournament.

### Inputs:
table_name: table, columns: ['No.', 'Date', 'Tournament', 'Winning score', 'To par', 'Margin of victory', 'Runner(s)-up']

### Response:
SELECT MIN No. FROM table WHERE Tournament = BMW Championship