CREATE TABLE table_204_155 (id NUMBER, "rank" NUMBER, "heat" NUMBER, "athlete" CLOB, "nationality" CLOB, "time" NUMBER, "notes" CLOB)

what was the number of cyclists from heat 2 ?
SELECT COUNT(*) FROM table_204_155 WHERE "heat" = 2
SELECT COUNT(*) FROM "table_204_155" WHERE "heat" = 2