CREATE TABLE table_49798 ("Year" FLOAT, "Tournament" CLOB, "Venue" CLOB, "Result" CLOB, "Extra" CLOB)

What is the total number of Year(s), when Tournament is 'World Championships'?
SELECT COUNT("Year") FROM table_49798 WHERE "Tournament" = 'world championships'
SELECT COUNT("Year") FROM "table_49798" WHERE "Tournament" = 'world championships'