Notice of RetractionResearch on the Derivation of Relations predicate methods for Complex universal quantifier

@article{Zhu2010NoticeOR,
  title={Notice of RetractionResearch on the Derivation of Relations predicate methods for Complex universal quantifier},
  author={Jishun Zhu and Shao Qian and Tong Shi},
  journal={2010 2nd International Conference on Electronic Computer Technology},
  year={2010},
  pages={29-31}
}
In the logical query of relational database, the Derivation of Relations predicate Methods is the theoretical foundation, but SQL is The standard computer query language, which concrete the logical query of software. Special emphasis, for Complex universal quantifier, it's just in the theory of Theoretic. The Research on the Derivation of Relations… CONTINUE READING