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

Which program is broadcast most frequently? Give me the program name.
SELECT t1.name FROM program AS t1 JOIN broadcast AS t2 ON t1.program_id = t2.program_id GROUP BY t2.program_id ORDER BY COUNT(*) DESC LIMIT 1
SELECT "t1"."name" FROM "program" AS "t1" JOIN "broadcast" AS "t2" ON "t1"."program_id" = "t2"."program_id" GROUP BY "t2"."program_id" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1