CREATE TABLE table_2394927_1 (max_downstream_throughput___mbit_s__ VARCHAR, profile VARCHAR)

List all mbit/s with profiles of 8b.
SELECT max_downstream_throughput___mbit_s__ FROM table_2394927_1 WHERE profile = "8b"
SELECT "max_downstream_throughput___mbit_s__" FROM "table_2394927_1" WHERE "8b" = "profile"