多项选择题

Which method could be utilized to identify both DML operations and the SQL statements needed to undo those operations for a specific schema owner？（）

A.A
B.B
C.C
D.D

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单项选择题

You have just performed a FLASHBACK TABLE operation using the following command：
flashback table employees to scn 123456；
The employees table has triggers associated with it.
Which of the following statements is true regarding the state of the triggers during the Flashback Table operation？（）

A. All the triggers are disabled.
B. All the triggers are enabled by default.
C. Enabled triggers remain enabled and disabled triggers remain disabled.
D. Triggers are deleted when a Flashback Table operation is performed.

单项选择题

Which of the following statements is true regarding implementing a Flashback Table recovery？（）

A. An SCN is never used to perform a Flashback Table recovery.
B. If a significant number of changes have been made to the table， row movement must be enabled.
C. The tablespace must be offline before performing a Flashback Table recovery.
D. Flashback Table recovery is completely dependent on the availability of undo data in the undo tablespace.

单项选择题

Which of the following statements is true regarding the VERSIONS BETWEEN clause？（）

A. The VERSIONS BETWEEN clause may be used in DML statements.
B. The VERSIONS BETWEEN clause may be used in DDL statements.
C. The VERSIONS BETWEEN clause may not be used to query past DDL changes to tables.
D. The VERSIONS BETWEEN clause may not be used to query past DML statements to tables.