This is one more reason to leave the set processing to the database.
这就是将集合处理交给数据库完成的另一个原因。
The result is simplified functions that leave the set processing to the database engine.
其结果就是将集合处理交给数据库引擎的简化函数。
They are relational databases that provide the strengths of the relational model and its set processing.
这两种都是关系型的数据库,因而包含了关系模型及其集合处理的长处。
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