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数据规范化
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管理系统中计算机应用(00051)
发表:2024年02月22日 00时02分55秒
作者:
admin
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数据规范化
一个低一级范式的关系模式,可以通过分解转换为若干个高一级范式的关系模式的集合,关系模式的这种不断改进提高的过程叫做数据规范化。
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More than five hundred poems Emily Dickinson wrote are about ().
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Bright ideas
Do you have bright ideas? Ideas or inventions that change society or, at least, make life easier for somebody? Perhaps we all do sometimes, but we don’t often make the idea a reality. Recently, in Britain, there was a competition call
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