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Case 6: Reference multiple namespaces in a single query.
案例6：在一个查询中引用多个名称空间。
youdao
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A single query to the data store would return everything you need.
对数据存储的单一查询就可以返回您所需要的任何东西。
youdao
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A single query to the data store would return everything you need.
对数据存储的单一查询就可以返回您所需要的任何东西。
youdao