That number is used as an index into the partitioning map to select the database partition for that row.
这个号码将用于作为分区映射的一个索引，以选择那一行所在的数据库分区。
The resulting display allows the operator to select which partition to attach to.
随即出现的显示允许管理者选择连接到哪个分区。
You may also select an existing partition and reuse it by editing the partition and changing its properties.
也可以选定一个现有分区并重用它，只需编辑分区并更改其属性。
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