多项选择题
A.Set the UNDO_RETENTION parameter to AUTO.
B.Create an initial undo segment in undotablespace.
C.Set the UNDO_RETENTION parameter to 900 or more
D.Set the initialization parameter UNDO_MANAGEMENT to AUTO
E.Set the UNDO_MANAGEMENT parameter to the name of an undotablespace
单项选择题 You work as a database administrator for Supportcenter.cn. Because of space constraints， you decided to manually shrink the table. You executed the ALTER TABLE ....SHRINK SPACE statement to shrink the space and you receive an error as follows： ERROR at Line 1： ORA-10635： Invalid segment or tablespace type What could be the reason？ （）
单项选择题 YouworkasadatabaseadministratorforSupportcenter.cn.YourdatabaseisinNOARCHIVELOGmodeandyouwanttoperformabackup.Whichtypeofbackupwouldbeappropriateinthiscase？（）
单项选择题 YouworkasadatabaseadministratorforSupportcenter.cn.Youenabledtracingwhilecreatingalistenertoyourdatabase.Whatadditionalinformationisavailabletoyouwhenyouenabletracing？（）