This query would be much more difficult to represent in a relational query language.

而在关系查询语言中，该查询表示起来将会困难得多。

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Like a stored table, the result of a relational query is flat, regular, and homogeneous.

与所存储的表一样，该关系查询的结果也是平面的、规则的、同构的。

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With IBM Mashup Center, you can create a feed from data that is returned from a relational query.

可以通过IBM Mashup Center创建一个来自数据的数据源，该数据是从关系型查询返回的。

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This traditional database platforms, known as relational database management systems (RDBMS) all use a language called SQL (structured query language).

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With a relational database, you start with the domain objects, and represent them in a way that guarantees that virtually any query can be expressed.

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