Database: program_share
Question: find the program owners that have some programs in both morning and night time.
SQL: select t1.owner from program as t1 join broadcast as t2 on t1.program_id  =  t2.program_id where t2.time_of_day  =  "morning" intersect select t1.owner from program as t1 join broadcast as t2 on t1.program_id  =  t2.program_id where t2.time_of_day  =  "night"