SADTool = System analysis and desing Tool. tool help draw DFD and ERD. It also give the standard database(NF1, NF2, NF3, ...) (系统自动生成,下载前可以参看下载内容) 下载文件列表 SADTools/DocToolkit/bin/Debug/DocToolkit.dll SADTools/DocToolkit/bin/Debug/DocToolkit.pdb ...
In fact, whereas normalization itself is intuitive, it usually takes quite a bit of advanced skill to recognize when it is appropriate tode-normalize a database (that is, remove the natural efficient relationships that a normalized data structure provides). Denormalization is a fairly common task...
In fact, whereas normalization itself is intuitive, it usually takes quite a bit of advanced skill to recognize when it is appropriate tode-normalize a database (that is, remove the natural efficient relationships that a normalized data structure provides). Denormalization is a fairly common task...