human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: No. in season, No. in series, Title, Canadian airdate, US airdate, Production code
###Question: The canadian airdate of 17 march 2008 had how many numbers in the season?
gpt
SELECT COUNT No. in season FROM table WHERE Canadian airdate = 17 March 2008