CREATE TABLE table_203_248 (id DECIMAL, "code" TEXT, "year" DECIMAL)

how many different codes were used from 1953 to 1958 ?
SELECT COUNT(DISTINCT "code") FROM table_203_248 WHERE "year" >= 1953 AND "year" <= 1958
SELECT COUNT(DISTINCT "code") FROM "table_203_248" WHERE "year" <= 1958 AND "year" >= 1953