CREATE TABLE table_204_603 (id NUMBER, "pos" CLOB, "no" NUMBER, "rider" CLOB, "bike" CLOB, "laps" NUMBER, "time" CLOB, "grid" NUMBER, "points" NUMBER)

how many racers did not start ?
SELECT COUNT("rider") FROM table_204_603 WHERE "time" = 'did not start'
SELECT COUNT("rider") FROM "table_204_603" WHERE "time" = 'did not start'