Table: vuelta_2008
Columns: stage
winner
general_classification
points_classification
mountains_classification
combination_classification
team_classification

Question: How many stages were there where the winner and the points classification were Alberto Contador?
SQL: SELECT COUNT("stage") FROM vuelta_2008 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 vuelta_2008 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 vuelta_2008 WHERE "team_classification" = 'Quick Step'