CREATE TABLE table_204_562 (id DECIMAL, "no." DECIMAL, "date" TEXT, "location" TEXT, "surface" TEXT, "opponent in final" TEXT, "score" TEXT)

what is the total number of locations that used a clay surface ?
SELECT COUNT("location") FROM table_204_562 WHERE "surface" = 'clay'
SELECT COUNT("location") FROM "table_204_562" WHERE "surface" = 'clay'