CREATE TABLE "series" (
  "series_number" real,
  "number_of_episodes" real,
  "original_air_date" real,
  "dvd_region_2_release_date" text,
  "dvd_region_1_release_date" text
);

Question: How many series originally aired before 1999 with more than 7 episodes and a DVD Region 1 release date of 16 april 2013?
SQL: SELECT COUNT("series_number") FROM "series" WHERE "original_air_date"<1999 AND "number_of_episodes">7 AND "dvd_region_1_release_date"='16 april 2013';

Question: What's the latest original air date with more than 10 episodes and a DVD Region 2 release date of 23 april 2012?
SQL: SELECT MAX("original_air_date") FROM "series" WHERE "dvd_region_2_release_date"='23 april 2012' AND "number_of_episodes">10;

Question: What was the original air date of series number 10?
SQL: SELECT AVG("original_air_date") FROM "series" WHERE "series_number"=10;

Question: What's the sum of the number of episodes that originally aired after 1991 with a series number smaller than 21 and a DVD Region 2 release date of 26 march 2012?
SQL: SELECT SUM("number_of_episodes") FROM "series" WHERE "original_air_date">1991 AND "series_number"<21 AND "dvd_region_2_release_date"='26 march 2012';

Question: What's the lowest series number that originally aired before 2009 with more than 7 episodes and had a DVD Region 2 release date of 26 july 2004?
SQL: SELECT MIN("series_number") FROM "series" WHERE "original_air_date"<2009 AND "dvd_region_2_release_date"='26 july 2004' AND "number_of_episodes">7;