CREATE TABLE "most_played_songs" (
  "rank" real,
  "song_title" text,
  "composer_s" text,
  "performer_s" text,
  "year" real
);

Question: Who sang the song composed by Mariah Carey and Walter Afanasieff?
SQL: SELECT "performer_s" FROM "most_played_songs" WHERE "composer_s"='mariah carey and walter afanasieff';

Question: How many years was Louis Armstrong performing?
SQL: SELECT COUNT("year") FROM "most_played_songs" WHERE "performer_s"='louis armstrong';