A beginner's guide to first, second and third normal form when dealing with database normalization. Like the video? Buy me a coffee and help me make more videos :-) www.paypal.com/paypalme/richa...
In so many courses, they use ridiculous language almost to make the information as indigestible as possible. Thank you so much for making an effort to convey a cohesive idea. Academia should learn a thing or two from you.
Need advice for normalisation of a database for purchases in a book store How would I normalise a table in 1nf 2nf and 3nf that has details for a customers purchase of different books-including Author, title, purchase date, price. There is 7 different books, with all the information above for each of the books Also for the purchaser there is contact information such as name and address. Can someone please explain this properly or give me an example. Thanks!
Stopping the video at 5:14 to make this comment. You put the first table into 1NF, but then to move on, you switched to a completely different example. From a viewer's perspective, it would have been more helpful in creating understanding to have the same example follow through all the forms of normalization. I'm not ungrateful... I truly appreciate this video! It's just a suggestion. :-)
@@studious_viewer I believe that Tracy means to say that he should have chosen a single example that was unstructured which could then move all the way to total normalization. I think that this would actually be better done as a "part 2" so that each transition can be viewed both in a vacuum, but also as a complete series of transformations.
Simple explanation and examples. What a textbook can't do in ten pages is done in under 12 minutes. Thank you for taking the time in making this video, please keep up the great work!
So easy to understand. I spent way too long being confused by a text book and you helped me grasp the concept in a fraction of the time I spent reading. Plus...your voice is nice to listen to.
This is such a clear and concise breakdown. Was trying to learn about DB normalisation from a textbook and it was so boring. Thank you very much for making this video.
From all the tutorials i've watched regarding this topic, this is the only one that made me understand completely the 3 Normal Forms. Thank you so much ♥
This is so much easier to understand than in my university course. My lecturer spends 2 ours on a topic overcomplicating it and throwing in fancy terminology. This is clear and concise and easily coneys the topic. Thanks :)
Thank you for this explanation! I'm retaking a databases course, and the first time around, I had trouble understanding normal forms in lecture or from the verbose section in the textbook. This video, however, is very easy to understand
Thanks, I already knew how to do db normalisation (I can do it without thinking), but I need to "show my workings" for an assignment and I tend to get lost in the rules of the normal forms, this explanation is a big help! -your mention about splitting first name, last name is interesting, as I've seen people advocate for either approach (splitting, or leaving the full name). I think the best wisdom on the matter is, it depends on whether one needs to access the first name and last name separately or not. If no need, they can remain joined.
4 years later... tomorrow I am going to have a meeting with a colleague from Data Science who disrespected 1NF. I don't know who or how is listening to me, but I didn't know anything about this and RU-vid suggested this video in the New for me section of the Home. I feel like having buffed up with a side quest before having to beat a boss.
Nobody made it simple to understand like you, millions thumbs up for you, but there is no transitivity seen between the non prime attributes in 3NF. Thanks
This was 2 50-minute lectures in my Database class, and it still didn't make sense. This is a 11 minute video which clearly explains what each form is and how to make a database comply to a form. Thank you.
Your tutorial is a gem, mate!! It's really simple, the examples are great, and (not to be racist but I feel every European that has recently started messing with programming) you speak in fluent, understandable English. I'm having such a hard time to understand Indians trying to explain anything in English, which is such a pity if you consider how great some of their tutorials are
It would have been much better if you have used one (unstructured) example through out the video, and made use of keys on the 3NF because one person could be a winner more than once in different years of course or names be the same (highly unlikely but possible). Besides that, great tutorial, you made it much easier. Thank you.
I agree that using the same dataset from start to finish might have had its own benefits. However, from the example you cited, even if the same person with the same name won all tournaments in the same year or multiple years, does it distort the 3NF? Won't every record or row still be unique as tournament names and years do the distinguishing?
Pretty neat, Spent hours trying to understand the material provided by the university, even failed a test. just watched this video and now understand 1NF, 2NF and 3NF.
Thank you so much. I think you illustrate it much better than my professor. I think my professor simply wasted my time. From now on, I decide not to attend her lectures any more, but listen to your lecture instead.
Thank you for this very helpful video! One comment for the last example (2NF -> 3NF): Winner contains both the winners first name and last name. Therefore it is not in 1NF because the values are divisable. If we want to be correct, we need to split up the names in first_name and last_name
Does a first name and last name need to be separate in order to achieve atomicity and therefore 1NF? The answer is... it depends on what you are going to do with the data. If you are going to search, sort or filter using fn/sn separately then it needs to be separate and therefore it is not in 1NF, if you are only ever going to use that data in a single combined manner then it is indeed in 1NF.
Thank you very much , u r the first one conveying the ideas clearly but I have something to ask you for if possible my friend that is if you could provide another example about the third form and thanks again
Thanks, that's a brilliant explanation. You should write a book, because that is better than the books I've read. I see you do a lot of hobbyist videos. Perhaps you should do some more aimed at professionals. I'd definitely watch them. Especially about databases.
