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单选题
下列哪项要求书面的变更通知单(Written change orders)?()
A
不论大小的所有项目
B
大项目
C
具有正式配置管理系统的项目
D
变更控制系统的成本可以调整的项目
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单选题您的主管让您修改ORDERS表中的AMOUNT列。他要求将该列配置为接受默认值250。该表包含您需要保留的数据。应执行以下哪条语句来完成此任务()A
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单选题You issued the following command: ALTER DATABASE ENABLE BLOCK CHANGE TRACKING; What will be the result of issuing this command?()A
The block change tracking feature is enabled, and the information about the system change number is written in the change tracking file.B
The block change tracking feature is enabled, and the information about the log sequence number is written in the change tracking file.C
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the locations of the redo log filesC
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