CREATE TABLE "stations" (
  "station" text,
  "local_authority_a" text,
  "servedby" text,
  "station_users_2004_05" real,
  "station_users_2005_06" real
);

Question: Which Servedby has a Local authority [a ] of thurrock, and a Station of ockendon?
SQL: SELECT "servedby" FROM "stations" WHERE "local_authority_a"='thurrock' AND "station"='ockendon';

Question: Which Station users 2005–06 has a Station users 2004–05 of 2,117,300?
SQL: SELECT MIN("station_users_2005_06") FROM "stations" WHERE "station_users_2004_05"='2,117,300';

Question: How many Station users 2005–06 that has a Station users 2004–05 of 1,455,700?
SQL: SELECT COUNT("station_users_2005_06") FROM "stations" WHERE "station_users_2004_05"='1,455,700';