CREATE TABLE "1905_1911" (
  "class" text,
  "wheels" text,
  "date" text,
  "no_built" real,
  "loco_nos" text
);

Question: On what date were 5 built with 4-4-2t wheels?
SQL: SELECT "date" FROM "1905_1911" WHERE "no_built"=5 AND "wheels"='4-4-2t';

Question: On what date was the number of locomotives 421-6?
SQL: SELECT "date" FROM "1905_1911" WHERE "loco_nos"='421-6';

Question: How many were built with a locomotive number of 11-20?
SQL: SELECT "no_built" FROM "1905_1911" WHERE "loco_nos"='11-20';

Question: On what date were more than 5 built with 4-4-2 wheels?
SQL: SELECT "date" FROM "1905_1911" WHERE "wheels"='4-4-2' AND "no_built">5;

Question: On what date were less than 10 built with a locomotive number of 31-35?
SQL: SELECT "date" FROM "1905_1911" WHERE "no_built"<10 AND "loco_nos"='31-35';