In this case, I start by writing a DAO to provide search capabilities on the product catalog datastore.
在这个示例中，我从编写dao开始，用它提供对产品目录数据存储的搜索功能。
The most successful sites provide a broad range of search capabilities to allow all groups to find the most appropriate level.
最成功的站点会提供广泛的搜索功能，使所有用户群都能找到级别最合适的搜索结果。
In the past, this kind of qualitatively different data was often not even stored in the same RDB and, if stored, the RDB could only provide low-level search capabilities.
在过去，这些在性质上各不相同的数据甚至常常不是存储在相同的RDB中，即使是存储在相同的RDB中，这种RDB也只是简单提供低级的搜索功能。
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