CREATE TABLE broadcast (program_id VARCHAR(255), Time_of_day VARCHAR(255)); CREATE TABLE program (owner VARCHAR(255), program_id VARCHAR(255))
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"