CREATE TABLE "table1_29273115_1" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text
);

Question: On how many different dates was the episode written by Charlie Day aired for the first time?
SQL: SELECT COUNT("original_air_date") FROM "table1_29273115_1" WHERE "written_by"='Charlie Day';

Question: Who are the writers of the episode with production code IP02009?
SQL: SELECT "written_by" FROM "table1_29273115_1" WHERE "production_code"='IP02009';

Question: Who are the writers of the episode titled "Mac Bangs Dennis' Mom"?
SQL: SELECT "written_by" FROM "table1_29273115_1" WHERE "title"='\"Mac Bangs Dennis'' Mom\"';

Question: How many different titles does the episode with production code IP02003 have?
SQL: SELECT COUNT("title") FROM "table1_29273115_1" WHERE "production_code"='IP02003';