- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
多項(xiàng)選擇題
These are the details about V$FLASHBACK_DATABASE_STAT：
SQL> DESC V$FLASHBACK_DATABASE_STAT Name Null？ Type
------------- -------- --------------
BEGIN_TIME DATE END_TIME DATE
FLASHBACK_DATA NUMBER
DB_DATA NUMBER REDO_DATA NUMBER
ESTIMATED_FLASHBACK_SIZE NUMBER
Which two statements regarding the V$FLASHBACK_DATABASE_STAT view are true？ （）
A.BEGIN_TIME is the time at which Flashback logging is enabled.
B.END_TIME is the time at which the query is executed on the view.
C.REDO_DATA is the number of bytes of redo data written during the interval.
D.This view contains information about flashback data pertaining to the last 24 hours.
E.FLASHBACK_DATA is the amount of flashback data generated since the database was opened.
你可能感興趣的試題
