The size of DWs also makes it more difficult to change existing physical DB design when that means moving lots of data (using export and import).

DW的庞大规模也使得更改已有的物理DB设计比较困难，因为这意味着要移动大量的数据（使用导出和导入）。

youdao

The size of DWs also makes it more difficult to change existing physical DB design when that means moving lots of data (using export and import).

DW的庞大规模也使得更改已有的物理DB设计比较困难，因为这意味着要移动大量的数据（使用导出和导入）。

youdao