CREATE TABLE table_204_30 (id NUMBER, "year built" CLOB, "works number" NUMBER, "wheel arr." CLOB, "gauge" CLOB, "original owner" CLOB, "name" CLOB, "current location" CLOB, "notes" CLOB)

after 1940 , how many steam locomotives were built ?
SELECT COUNT(*) FROM table_204_30 WHERE "year built" > 1940
SELECT COUNT(*) FROM "table_204_30" WHERE "year built" > 1940