CREATE TABLE broadcast (channel_id DECIMAL, program_id DECIMAL, time_of_day TEXT)
CREATE TABLE program (program_id DECIMAL, name TEXT, origin TEXT, launch DECIMAL, owner TEXT)
CREATE TABLE channel (channel_id DECIMAL, name TEXT, owner TEXT, share_in_percent DECIMAL, rating_in_percent DECIMAL)
CREATE TABLE broadcast_share (channel_id DECIMAL, program_id DECIMAL, date TEXT, share_in_percent DECIMAL)

Who are the owners of the programs that broadcast both in the morning and at night?
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"
SELECT "t1"."owner" FROM "program" AS "t1" JOIN "broadcast" AS "t2" ON "Morning" = "t2"."time_of_day" AND "t1"."program_id" = "t2"."program_id" INTERSECT SELECT "t1"."owner" FROM "program" AS "t1" JOIN "broadcast" AS "t2" ON "Night" = "t2"."time_of_day" AND "t1"."program_id" = "t2"."program_id"