user: Question: Name the total number when date is 30 May 2010
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, '1 Aug 2004', 'Scandinavian Masters by Carlsberg', '69-65-69-69=272', '−16', '5 strokes', 'Peter Hanson']
SQL:

assistant: SELECT COUNT("No.") FROM "Table" WHERE "Date" = '30 May 2010';