将 SQL 转换为关系代数
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Converting SQL to relational algebra
提问by user559142
Does anyone know any good online resources which I can use to practise SQL to relational algebra conversion?
有谁知道我可以用来练习 SQL 到关系代数转换的任何好的在线资源？
回答by Johan
See: http://db.grussell.org/index.html
The following powerpoint presentation may also be of help:
http://www.cs.wayne.edu/~shiyong/csc6710/slides/kiferComp_348761_ppt05.ppt
请参阅：http: //db.grussell.org/index.html
以下幻灯片演示也可能有所帮助：http:
//www.cs.wayne.edu/~shiyong/csc6710/slides/kiferComp_348761_ppt05.ppt
