user: Question: How many different players did the most high assists on the March 4 game?
Columns: ['Game', 'Date', 'Team', 'Score', 'High points', 'High rebounds', 'High assists', 'Location Attendance', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [60.0, 'March 1', '@ LA Clippers', 'L 104–108 (OT)', 'Carlos Boozer (20)', 'Mehmet Okur (13)', 'Deron Williams (13)', 'Staples Center 15,422', '38-22']
SQL:

assistant: SELECT COUNT("High assists") FROM "Table" WHERE "Date" = 'March 4';