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

Show me the owner of the channel with the highest rating.
SELECT owner FROM channel ORDER BY rating_in_percent DESC LIMIT 1
SELECT "owner" FROM "channel" ORDER BY "rating_in_percent" DESC FETCH FIRST 1 ROWS ONLY