此外，只有当物理表数据对象或分区中没有压缩字典时，才能运行adc。

Additionally, ADC only occurs if no compression dictionary exists within the physical table data object or partition.

youdao

具体地说，管理员必须定义适当的数据库对象，比如分区组、表空间、缓冲区池等等。

Specifically, an administrator must define appropriate database objects, such as partition groups, table Spaces, buffer pools, and so on.

youdao

如果根据两个或多个键查询一个对象，进行分区所依据的最合理的键将是最常用的键。

If an object will be looked up by two or more keys, the most reasonable key that you partition by would be the most commonly used key.

youdao