设计了中间语言的结构，研究了这种中间语言到SQL语句的转换，给出了相应的转换算法，并对算法进行了测试。
The structure of middle language is designed, the change from middle language to SQL sentence is researched, the algorithm is given and the test is done.
提出了语义查询树的中间语言结构，设计了查询语句向语义查询树的转换算法。
The idea that use the structure of semantic meaning query tree as middle language is put forward.
提出了语义查询树的中间语言结构，设计了查询语句向语义查询树的转换算法。
The idea that use the structure of semantic meaning query tree as middle language is put forward.
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