In brief, hybrid databases are still composed of relational tables.

简单地说，混合数据库仍由关系表构成。

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Shredding XML data to relational tables is still a common requirement.

将XML数据分解到关系表仍然是常见的一种需求。

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Classes map to relational tables and attributes are implemented as columns.

映射到关系表和属性的类作为列实现。

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The vast majority of this growth is occurring in the realm of unstructured data, i.e. data that does not fit well into relational tables such as databases.

FORBES: Names to Know in Big Data: Hitachi Data Systems (HDS)

In a relational database, this would probably involve several tables and joins.

FORBES: What You Need to Know About NoSQL Databases