user: Question: How many production codes are there for episode 10 in the season?
Columns: ['Series', 'Season', 'Original air date', 'Production code', 'Episode title']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, '1', 'July 8, 2007', '101', '"Not So Happy Campers - Part 1"']
SQL:

assistant: SELECT COUNT("Production code") FROM "Table" WHERE "Season" = '10';