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E. F. Codd’s Relational Model

In this video, we explore the relational model developed by E. F. Codd and its history. This video was made in collaboration with my friend Torge: https://www.youtube.com/@TorgeBlunck My website: https://www.emilien.sh/ The majority of this video was made using the awesome Manim Community library: https://www.manim.community/ Relational Completeness of Data Base Sublanguages by E. F. Codd: https://www.inf.unibz.it/~franconi/teaching/2006/kbdb/Codd72a.pdf RelaX (relational algebra calculator): https://dbis-uibk.github.io/relax Relational playground: https://relationalplayground.com Music by Vincent Rubinetti Download the music on Bandcamp: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown Stream the music on Spotify: https://open.spotify.com/playlist/3zNK20qC96mVSww60lVi1k Color palette (Catppuccin): https://catppuccin.com

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5.52 Overall score*

62 Rank

27 Votes

6 Comments

Comments

3.9

I think, I definitely understood how the relational algebra/calculus worked by the end. It was a little long, and I did end up forgetting why it was important? Also might’ve been useful to more clearly separate the primitive vs derived operations I’d have loved to have a bit more of the historical details near the start!

6.9

This should be two videos. The first 23 minutes are great. The subject matter is easy to understand and approachable, and the explanations are clear. Then there is a massive spike in difficulty and the learning curve becomes a step function. The section on relational calculus and the reduction algorithm is way too information-dense. It should be separated out and explained at much greater length, over the course of its own video.

2.9

Majority of the video is reading from the slides. I can read. And read is ok, but it's often not supplied with explanations. It deals impact on clarity. Novelty: in my opinion it's close to reading book on video. Memorability: tomorrow I'll forget it existed. For reference information book is better because it's easier to find information in the book than in the video.

2.4

The video is not very engaging, it feels like a typical college lecture and is something very plain and sounds like wikipedia, without taking full advantage of the video format using audio visual ideas to make us understand.

5.7

Errata: At 3:52 you have mixed up sets and tuples. Rows are always tuples, as they are ordered. At 4:19 you use ℕ* as set of natural numbers without zero. Even though this is correct notation, it is easily confused, as you use the * oparator in the line below (S*) with a different meaning. Using ℕ+ would have been less confusing. Solid video with good examples, really nice for students hearing their first database lecture.

4.5

there is nothing like math here and also lacks the "aha" moment...its just a bunch of definition which we all learn in our undergraduate course its nothing new...i gave it about the same only becz you atleast worked with manim in creating animation.