The data in this type of materialized query table is maintained by the user.
这种物化查询表中的数据是由用户维护的。
The data in this type of materialized query table is maintained by the system.
这种物化查询表中的数据是由系统维护的。
A query executed against the EMP materialized query table shows that it is now fully populated with data.
通过查询emp物化查询表发现，它现在已经填入了数据。
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