This technique is similar to mapping, but produces a new ParallelArray on which further queries may be performed.

此技术与映射类似，但是形成新的ParallelArray，可以在其上执行进一步查询。

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SQL queries can be constructed to retrieve OLAP data based on either the cube model or cube objects.

可以根据多维数据集模型或多维数据集对象构造SQL查询来获得OLAP数据。

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The instructions can also be applied to queries based on the cube and cube-related objects.

这些说明也可以应用于基于多维数据集和多维数据集相关对象的查询。

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Some Big Data companies are beginning to look at ways of taking the SQL language and allow these queries to be performed on Hadoop.

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He said in future scientists might be put on an on-call rota so queries could be answered in a timely fashion.

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The Cascalog system has combined the Cascading system for abstraction of advanced data processing on Hadoop and other systems, the Datalog declarative programming language that is well suited for expressing database queries in an abstract form, and the Clojure language to create a declarative language for queries that can be run on Apache Hadoop.

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