CREATE TABLE "series_1" (
  "episode_no" real,
  "airdate" text,
  "total_viewers" real,
  "share" text,
  "bbc_one_weekly_ranking" text
);

Question: What's the average total viewers that has 17.6% Share?
SQL: SELECT AVG("total_viewers") FROM "series_1" WHERE "share"='17.6%';

Question: What's the share of Episode 1?
SQL: SELECT "share" FROM "series_1" WHERE "episode_no"=1;