Which two are valid locking levels that are used by transactions in an Oracle database？（）
- A、row level
- B、block level
- C、object level
- D、schema level
- E、database level
正确答案:A,C
答案解析:有
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Oracle认证考试
Oracle认证考试
Which two are valid locking levels that are used by transactions in an Oracle database？（）
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