CREATE TABLE "fleet" (
  "order_year" text,
  "manufacturer" text,
  "model" text,
  "fleet_series_quantity" text,
  "powertrain_engine_transmission" text,
  "fuel_propulsion" text
);

Question: how many times is the fuel propulsion is cng?
SQL: SELECT COUNT("fleet_series_quantity") FROM "fleet" WHERE "fuel_propulsion"='CNG';

Question: what is the fuel propulsion where the fleet series (quantity) is 310-329 (20)?
SQL: SELECT "fuel_propulsion" FROM "fleet" WHERE "fleet_series_quantity"='310-329 (20)';

Question: who is the manufacturer for the order year 1998?
SQL: SELECT "manufacturer" FROM "fleet" WHERE "order_year"='1998';

Question: how many times is the model ge40lfr?
SQL: SELECT COUNT("manufacturer") FROM "fleet" WHERE "model"='GE40LFR';

Question: how many times is the fleet series (quantity) is 468-473 (6)?
SQL: SELECT COUNT("order_year") FROM "fleet" WHERE "fleet_series_quantity"='468-473 (6)';

Question: what is the powertrain (engine/transmission) when the order year is 2000?
SQL: SELECT "powertrain_engine_transmission" FROM "fleet" WHERE "order_year"='2000';