user: Question: How many different numbers are there for the game played on April 23?
Columns: ['#', 'Date', 'Opponent', 'Site/Stadium', 'Score', 'Win', 'Loss', 'Save', 'Attendance', 'Overall Record', 'Pac-10 Record']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: [22.0, 'April 1', 'Stanford', 'Jackie Robinson Stadium', '6-5 10', 'D. Klein (2-0)', 'A. Pracher (4-1)', 'None', 921.0, '22–0', '1–0']
SQL:

assistant: SELECT COUNT("#") FROM "Table" WHERE "Date" = 'April 23';