Question: Which channels broadcast both in the morning and at night? Give me the channel names.
SQL: SELECT t1.name FROM channel AS t1 JOIN broadcast AS t2 ON t1.channel_id  =  t2.channel_id WHERE t2.time_of_day  =  'Morning' INTERSECT SELECT t1.name FROM channel AS t1 JOIN broadcast AS t2 ON t1.channel_id  =  t2.channel_id WHERE t2.time_of_day  =  'Night'