user: ### NOW ANSWER:
Question: How many production codes does "Number One" have?
Columns: ['Episode #', 'Title', 'Directed by', 'Written by', 'Original air date', 'Prod. code']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, '"Crush"', 'Chris Bailey', 'Mark McCorkle & Bob Schooley', 'June7,2002', 113.0]
SQL:

assistant: SELECT MAX("Prod. code") FROM "Table" WHERE "Title" = '"Number One"';