CREATE TABLE table_204_298 (id NUMBER, "year" NUMBER, "competition" CLOB, "venue" CLOB, "position" CLOB, "event" CLOB, "notes" NUMBER)

how long did this runner compete in years ?
SELECT MAX("year") - MIN("year") + 1 FROM table_204_298
SELECT MAX("year") - MIN("year") + 1 FROM "table_204_298"