查詢oracle10G啓動時的時間和運行的時間

SELECT TO_CHAR (startup_time,'DD-MON-YYYY HH24:MI:SS') started_at,TRUNC (SYSDATE - (startup_time)) ||' day(s),'|| TRUNC (24* ((SYSDATE - startup_time) - TRUNC (SYSDATE - startup_time)))|| ' hour(s), '|| MOD (TRUNC (1440*((SYSDATE - startup_time) - TRUNC (SYSDATE - startup_time))),60)||' minute(s),'|| MOD (TRUNC (86400* ((SYSDATE - startup_time) - TRUNC (SYSDATE - startup_time))),60)||' seconds' uptime FROM  v$instance;