0
votes
1answer
22 views

Database relationship refresher

All, After several years of programming applications, I'm looking to refresh my understanding of databases. What I knew to begin with was fairly basic, and honestly, it's disappeared over time. I ...
4
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1answer
163 views

Symmetric self-referential many-to-many

I'm trying to model a hierarchy of categories where a category can have multiple parents ( an overlapping tree model as described in this book ) I have the following tables video_categories int ...