CREATE TABLE table_203_219 (id DECIMAL, "no" DECIMAL, "name" TEXT, "date of birth" TEXT, "height" TEXT, "weight" TEXT, "spike" TEXT, "block" TEXT, "2008 club" TEXT)

oliveira walewska has the same block as how many other players ?
SELECT COUNT("name") FROM table_203_219 WHERE "name" <> 'oliveira walewska' AND "block" = (SELECT "block" FROM table_203_219 WHERE "name" = 'oliveira walewska')
SELECT COUNT("name") FROM "table_203_219" WHERE "block" = (SELECT "block" FROM "table_203_219" WHERE "name" = 'oliveira walewska') AND "name" <> 'oliveira walewska'