Recent questions tagged Relational

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relational database - How to design a product table for many kinds of product where each product has many parameters

I do not have much experience in table design. My goal is to create one or more product tables that meet ... without a separate table for each kind of product? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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relational database - Self referential association in Ruby on Rails

I have an app in which I have the "Patient" resource. I want to make a self association among ... .com/questions/65877183/self-referential-association-in-ruby-on-rails...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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relational database - Is this relation in 2NF?

This is not homework. I made it up myself. R(a,b,c) a is a candidate key a->b (b is ... question from:https://stackoverflow.com/questions/65940016/is-this-relation-in-2nf...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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