Dear All,
i want to have history of an oracle instance startup for last Six month

e.g

STARTUP_TIME
--------------
9/1/07 3:36 PM
8/31/07 9:25 PM
8/3/07 4:23 PM
7/28/07 10:26 AM
4/6/07 6:21 PM
3/28/07 8:34 PM
3/19/07 1:10 AM
3/16/07 12:48 PM
3/14/07 12:11 PM

can anybody help me in this regard?