单选题Which of the following statements best describes Flashback Versions Query？（）A Flashback Versions Query is used to make changes to multiple versions of data that existed between two points in time.B Flashback Versions Query is used to view all version changes on rows that existed between the time the query was executed and a point in time in the past.C Flashback Versions Query is used to view version changes and the SQL to undo those changes on rows that existed between two points in time.D Flashback Versions Query is used to view all version changes on rows that existed between two points in time.
单选题
Which of the following statements best describes Flashback Versions Query？（）
A
Flashback Versions Query is used to make changes to multiple versions of data that existed between two points in time.
B
Flashback Versions Query is used to view all version changes on rows that existed between the time the query was executed and a point in time in the past.
C
Flashback Versions Query is used to view version changes and the SQL to undo those changes on rows that existed between two points in time.
D
Flashback Versions Query is used to view all version changes on rows that existed between two points in time.
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