A cluster is a group of one or more tables that share the same data blocks because they share common columns and are often used together in join queries. Storing tables in clusters offers the DBA a method to denormalize data. Clusters are transparent to the end user and programmer.
Storing tables in clusters offers the DBA a method to denormalize data.
请问这句话怎么解释？有什么用途，我理解不了
denormalize 怎么解释？
