CREATE TABLE table_203_664 (id DECIMAL, "club" TEXT, "town" TEXT, "founded" DECIMAL, "nickname" TEXT, "colours" TEXT, "home ground" TEXT, "titles" DECIMAL, "website" TEXT)

which clubs have no nickname ?
SELECT "club" FROM table_203_664 WHERE "nickname" IS NULL
SELECT "club" FROM "table_203_664" WHERE "nickname" IS NULL