Oracle OCP 082知识
剩余时间：
第 70 题 (多选题)：
Which three statements are true about sequences in a single instance Oracle database.
A. A sequence number that was allocated can be rolled back if a transaction fails.
B. A sequence can only be dropped by a DBA.
C. Sequences can always have gaps.
D. A sequence can issue duplicate values.
E. A sequence's unallocated cached values are lost if the instance shuts down.
F. Two or more tables cannot have keys generated from the same sequence
显示答案
正确答案：
C,E,F
解析：
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