Question: How many stages were there where the winner and the points classification were Alberto Contador?
SQL: SELECT COUNT("Stage") FROM "1-15294880-2" WHERE "Winner" = 'Alberto Contador' AND "Points classification" = 'Alberto Contador';

Question: When the winner was Alessandro Ballan, how many total team classifications were there?
SQL: SELECT COUNT("Team classification") FROM "1-15294880-2" WHERE "Winner" = 'Alessandro Ballan';

Question: When the team classification was Quick Step, what was the total number of general classifications?
SQL: SELECT COUNT("General classification") FROM "1-15294880-2" WHERE "Team classification" = 'Quick Step';