CREATE TABLE "table1_23294081_11" (
  "no" real,
  "num" real,
  "original_airdate" text,
  "performer_1" text,
  "performer_2" text,
  "performer_3" text,
  "performer_4" text,
  "u_s_viewers_millions" text
);

Question: How many millions of people in the US saw the episode number 226?
SQL: SELECT "u_s_viewers_millions" FROM "table1_23294081_11" WHERE "no"=226;

Question: What is the highest episode number?
SQL: SELECT MAX("no") FROM "table1_23294081_11";

Question: Who was performer 1 in the episode number 7 where Heather Anne Campbell was performer 2?
SQL: SELECT "performer_1" FROM "table1_23294081_11" WHERE "performer_2"='Heather Anne Campbell' AND "num"=7;

Question: What's the number of the episode seen by 2.99 millions of people in the US, where performer 2 was Heather Anne Campbell?
SQL: SELECT MIN("num") FROM "table1_23294081_11" WHERE "performer_2"='Heather Anne Campbell' AND "u_s_viewers_millions"='2.99';