Find the total rating ratio for each channel owner.
SELECT sum(Rating_in_percent) ,  OWNER FROM channel GROUP BY OWNER
SELECT sum(Rating_in_percent) ,  OWNER FROM channel GROUP BY OWNER
[{'sum(Rating_in_percent)': 0.2, 'Owner': 'Anhui Television'}, {'sum(Rating_in_percent)': 2.4299999999999997, 'Owner': 'CCTV'}, {'sum(Rating_in_percent)': 0.53, 'Owner': 'HBS'}, {'sum(Rating_in_percent)': 0.19, 'Owner': 'Shandong Television'}]