CREATE TABLE table_204_354 (id DECIMAL, "opus" TEXT, "title" TEXT, "genre" TEXT, "sub\\u00addivisions" TEXT, "libretto" TEXT, "composition" TEXT, "premiere date" TEXT, "place ,  theatre" TEXT)

what is the number of operas from the oper genre ?
SELECT COUNT("title") FROM table_204_354 WHERE "genre" = 'oper'
SELECT COUNT("title") FROM "table_204_354" WHERE "genre" = 'oper'