In this method, one of the tables, usually the smaller one, is scanned and used to create a hash table in memory.

在该方法中，需要扫描其中的一个表，通常扫描较小的那个表，用它在内存中创建一个哈希表。

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Update-the update method takes an integer ID to specify the row to update, as well as a hash table of fields to update with the specified values.

update—update方法接受一个整数ID，以指定要更新的行；或者接受一个字段哈希表，使用指定的值更新字段。

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Hash partitioning is the method by which the placement of each row in the partitioned table is determined. The method works as follows.

散列分区是用于确定每一行在分区表中的位置的方法。

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