user: Question: what is the pick number minimum if the NFL team is the San Diego Chargers?
Columns: ['Pick #', 'NFL Team', 'Player', 'Position', 'College']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [197.0, 'Denver Broncos', 'Gary Kubiak', 'Quarterback', 'Texas A&M']
SQL:

assistant: SELECT MIN("Pick #") FROM "Table" WHERE "NFL Team" = 'San Diego Chargers';