CREATE TABLE table_204_821 (id NUMBER, "speed [km/h  ( mph ) ]" CLOB, "train" CLOB, "type" CLOB, "location" CLOB, "date" CLOB, "comments" CLOB)

which train tested fastes after the mlx01 ?
SELECT "train" FROM table_204_821 WHERE "speed [km/h (mph)]" < (SELECT MIN("speed [km/h (mph)]") FROM table_204_821 WHERE "train" = 'mlx01') ORDER BY "speed [km/h (mph)]" DESC LIMIT 1
SELECT "train" FROM "table_204_821" WHERE "speed [km/h (mph)]" < (SELECT MIN("speed [km/h (mph)]") FROM "table_204_821" WHERE "train" = 'mlx01') ORDER BY "speed [km/h (mph)]" DESC FETCH FIRST 1 ROWS ONLY