CREATE TABLE table_203_715 (id NUMBER, "year" NUMBER, "competition" CLOB, "venue" CLOB, "position" CLOB, "notes" CLOB)

what is the number of world championships ?
SELECT COUNT(*) FROM table_203_715 WHERE "competition" = 'world championships'
SELECT COUNT(*) FROM "table_203_715" WHERE "competition" = 'world championships'