一条sql求N阶乘

-- 根据公式：log(a)(MN)=log(a)(M)+log(a)(N)
SQL> SELECT POWER(10, SUM(LOG(10, LEVEL)))
  2    FROM DUAL
  3  CONNECT BY LEVEL <= 6;

POWER(10,SUM(LOG(10,LEVEL)))
----------------------------
                         720