CREATE TABLE table_name_20 (rank INT, network VARCHAR, number_of_viewers VARCHAR)

Which Rank has a Network of bbc one, and a Number of Viewers of 30.15million? Question 2
SELECT SUM(rank) FROM table_name_20 WHERE network = "bbc one" AND number_of_viewers = "30.15million"
SELECT SUM("rank") FROM "table_name_20" WHERE "30.15million" = "number_of_viewers" AND "bbc one" = "network"