user: Question: What are the total points for sd 15?
Columns: ['Sd', 'Rk', 'Player', 'Points', 'Points defending', 'Points won', 'New points', 'Status']
Types: ['real', 'real', 'text', 'real', 'real', 'real', 'real', 'text']
Sample row: [2.0, 2.0, 'Rafael Nadal', 9595.0, 360.0, 1200.0, 10435.0, 'Runner-up, Final lost to Novak Djokovic [1]']
SQL:

assistant: SELECT SUM("Points") FROM "Table" WHERE "Sd" = 15.0;