CREATE TABLE "1893_1900" (
  "class" text,
  "type" text,
  "quantity" real,
  "date" text,
  "lner_class" text
);

Question: What is the Quantity of Type 2-4-2t?
SQL: SELECT SUM("quantity") FROM "1893_1900" WHERE "type"='2-4-2t';

Question: What was the Quantity on Date 1900?
SQL: SELECT SUM("quantity") FROM "1893_1900" WHERE "date"='1900';

Question: What is the Quantity of type 2-4-2t?
SQL: SELECT COUNT("quantity") FROM "1893_1900" WHERE "type"='2-4-2t';