CREATE TABLE table_203_648 (id NUMBER, "date" CLOB, "opposition" CLOB, "result" CLOB, "score" CLOB, "brazil scorers" CLOB, "competition" CLOB)

what is the number of countries they have played ?
SELECT COUNT(DISTINCT "opposition") FROM table_203_648
SELECT COUNT(DISTINCT "opposition") FROM "table_203_648"