---

You are maintaining your database in Oracle10g. You set the value of the UNDO_RETENTION initialization parameter to zero in the initialization parameter file. What will be the impact of specifying this setting？（）  
A: The database will not start.
B: The database will start but will not retain the undo data in the undo segment.
C: The database will start， and the undo segment will contain the undo data for at least one hour.
D: The database will start， and the undo segment will retain the undo data for at least 15 minutes.

---

出自：Oracle认证

显示答案