Complete guide to Database Normalization in SQL

This is a complete guide for anyone to understand Database Normalization in SQL. I will not just explain the Normalization concepts but also show you step by step process of normalizing a de-normalized dataset taken from Kaggle by following the different levels of normalization (Normal forms).
The video is divided into 3 sections:
In the first section, I will explain the basic concepts of normalization and the different levels of normalization (different normal forms), and some key points you need to know to better understand normalization.
In the second section, I will explain all the above concepts in detail with proper examples. We shall use a de-normalized dataset taken from Kaggle for illustration purposes. We shall follow different normal forms to normalize the Kaggle dataset which should give a complete understanding of how to normalize any dataset.
Finally, in the third and last section, I shall explain the different anomalies that exist in a de-normalized dataset such as insertion, updation, and deletion anomalies. We shall also see how a normalized database can overcome these anomalies.
Timestamp:
00:00 Intro
00:46 1. What is Normalization
03:12 Different levels of Normalization
05:14 2. Step-by-Step Normalizing a dataset
07:35 First Normal Form (1NF)
12:44 Second Normal Form (2NF)
25:59 Third Normal Form (3NF)
32:42 3. Different Anomalies (Insertion, Updation, Deletion Anomalies)
37:10 Deletion Anomalies
39:08 Updation Anomalies
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THANK YOU,
Thoufiq

[@petruciucur]

There is no doubt, for me you are the best Relational Database Management System trainer. The way you explain really makes me understand. Thanks!

[@techTFQ]

thanks buddy, glad you’ve liked my content

[@Maya.1988]

@@techTFQ Hi any dedicated course is there .... on sql performance and sql admin in Udemy or anywhere I will make my company to buy🙏🔥

[@vasuhii2250]

Very clearly explained each and every point

[@vijaygupta7066]

Till now I read many post articles but unable to understand but from your video I got proper understanding. On KZbin you and Ankit bansal content are like breaking hard problems and explaining in simple manner

[@shravyatharapatti]

Best way of explaining NF's,First time I understood the concepts clearly.

[@bharath8017]

too good sir,been searching in various other channels for this content but I could not understand anything,but your content and explaination was too good that i can understand by just a single watch

[@sominramchiary5880]

Clear and straightforward explanation, all concept cleared on Normalization, Thank you so much buddy

[@suganyanatarajan2661]

Best SQL trainer .. you teach the thought process as well which goes a long way! Thank you for all the great work.

[@kunalkumar-hl6gv]

This is the best video on internet which talks about this topic so perfectly!!!!!!!!!!!!!!!!!!!!! you forced me to comment!!!!!!!!!!!!!!!!!!!!! you are the best out there !!!

[@shadowitself]

as soon as I started my journey with sql databases I came across Ur channel every film proves that it was super good choice another great content THX

[@iamnoob7593]

Hands Down , Best video on normalization in entire internet.

[@poojabagane3691]

One of the best video on Normalization I have ever seen... Thank you for this beautiful explanation I got clarification on Normalization in an unequivocal manner.!!!!

[@vignesan4197]

I love your way of explanation and your SQL series will give a clear idea about basic to advanced levels of SQL skills. Thanks!❤

[@varshagoel5315]

My Goddd!!!!! What an easy explanation of such complex subjects. Great work!!!

[@sudhanshugrover2726]

Great explanation Thoufiq. Always a pleasure to watch your videos. I really like the way you channelize your thoughts in an easily comprehensible manner. The speed, clarity and content of your videos are absolutely perfect. Have watched other videos of yours and same opinion goes for them too. Coming to this one, i guess you knowingly kept the sales info till the 3rd step to explain transitive dependency, though you could've eliminated it at the same time you normalized Order/Prod/Cust info, since sales, just like customer, was also absolutely independent of candidate keys. Keep up the good work

[@varsharani5601]

I used to think Normalization as a complex concept. But till the point, I reached in video yet, I am finding it very simple because of your explaining style. Thanks

[@souravshome2602]

No doubt, you are the best sql trainer. After watching your video my all doubts about normalisation is cleared. Never miss your single video. Because of you I got to know lots of concepts about sql. Thank you Sir❤️.

[@joaofstock]

I have to say that I have made 3 courses with modules about data modeling and schemas, and this is the first time that I'm realling understanding how to build an ER Diagram. Many thanks for your explanation and all the best

[@basavaprabhusherikar7737]

I had no idea about what is 1NF, 2NF, or anything related to it. But after watching this video I get the idea now. And also why is it good to have different tables, and what kind of anomalies we would be facing if not done. Thanks buddy! Really a very good tutorial. Very clear and detailed explanation.

[@akashchristopher]

I love the way of your teaching. Crystal clear explanation.. Thank you Toufiq...

[@shorakhutte1887]

Very clearly explained. My doubts got clear. Thanks for providing valuable content.

[@parthibangopi8393]

I was very confused in this concept and have seen many videos and no one explained the way you explained. You are awesome. Expecting more videos related to SQL. Thank you

[@Joshua_t_]

Great video. Working through the example database helps a lot.

[@amirtahaehsaei1609]

Brief, solid, and easy to understand. thumbs up!

[@travelnlearn]

Amazing video, I completely got entire concept in 1 video

[@suyash7450]

Normalization was topic that used to confuse me very time i saw so much content regarding NFs but getting confused more n more but now after watching ur video i am absolutely clear abut it ...

[@542_jayalaxmi_cse-a2]

Nice explanation sir I have just started to learn SQL u have cleared the way how to learn in the proper manner

[@manikantashet5921]

Amazing explanation and clarity. Thank you!

[@minithyagraj6692]

Very well explained! This concept couldn't be made simpler. Thank you!!

[@anuragshah3433]

For those who are confused on transitive dependency in 3NF, if we just look at the output of 2NF, Order_ID -> Order Number and Order number -> Sales contact first name and Order number -> Sale contact second name hence there is a transitive dependency. It was not flagged in 2NF as Order ID -> Sales contact first name and Order Id -> Sales contact second name, hence these are completely dependent on pk as well.

[@abhishekpunia606]

"Mind is officially blown! 🤯 Thanks for simplifying Normalization in DBMS with real-world examples. You're a rockstar teacher! 🌟 #DBMSSimplified"

[@bhupellygopikrishna3039]

Excellent Explanation, It Cleared every doubt in Normalization. Thanks

[@yordanosadigo]

No one explained this like you do....Thank you!

[@viveksingh524]

Finally today I learnt normalisation in easy way. Thanks a lot 😊

[@joshuastates]

Great video, Thoufiq. Very clear explanations

[@Rajnikapoor-vm4mm]

You are truly amazing sir, the way you describe each concept make it so clear and easy .... normalization is the topic which i always get to confuse but your explanation cleared all my doubts... thanks again

[@VishalKumar-sc9ep]

Hats off sir ❤ Now my concepts are crystal clear

[@PatrickMuvunyi10]

Thanks for making it crystal clear! Satisfied!

[@deepikasanthanakrishnan3264]

Amazed by your explanation😊. Thank you. Very usefull.

[@quintonbart8452]

Absolutley brilliant. I understood the concept immediately. You are an excellent trainer.

[@techTFQ]

Glad it was helpful

[@hafizmoizmoiz6901]

Very informative tutorial. All my concepts are clear now. Keep it up ❤

[@mohammedshahil4898]

One of the most difficult concept explained in the best way possible👌👏🏻 As always a very useful video🙌🏻 No doubt you’re the best SQL trainer out there.

[@techTFQ]

Thank you bro 😎

[@dhanush98b11]

Toufiq bro, I can say that you are the gem 💎 For teaching the sql concepts in the most understandable way. I'm working as plsql developer from 2 years without knowing anything about normalization. Thank you bhai for very informative contents on sql ❤.

[@dineshvardam2176]

You are really great sir, you explained this complex concept in easiest way...

[@VaishnaviShinde-hh8sg]

You are the best teacher.your all sql videos are best for learning. Your explanation throughout the videos is mindblowing. please make more videos on Sql

[@omkargurme20]

Very well explained sir. Thank you for the information

[@mohitdaxini3067]

Too useful and seemed a relatable example rather than just reading out the definitions like other yt videos do when it comes to SQL normalisation topic...kudos 🏆

[@techTFQ]

Thanks buddy, glad you like it

[@garrettlassalle6544]

Thank you for this video. After watching it, I understand it now. You explained it well.

[@parandama4589]

Your a master of RDBS concepts

[@david-mc8hc]

bravo! Very good examples and great/neat presentation! I have been struggling with this topic for quite sometime and now I can put it to rest. Thank you

[@hsudhdhud]

Definitely this is one of the best best best best video from an organisation perspective.

[@makav3li665]

Well curated and properly explained 👍

[@triparnodas2269]

You are doing a great job brother, most crystal clear explanation i have found on this topic normalisation, you are making SQL learning a cake walk for all the learners, kudos to you

[@techTFQ]

Thank you Das .. so glad this helped

[@AparajithaSaravanakumar]

Best normalisation explanation sir Thank you ❤

[@attilapekkaszabo-iv6tl]

Brilliant, had this topic way back in Uni, but your explanation is 100x better. Great for refreshing my knowledge.

[@techTFQ]

Great to hear

[@micaelzekarias1537]

Ur way of explaining things are so interesting. Keep it up. Love ur way of teaching. GBU

[@endalekinfe3391]

That is wonderfull explanation, thank you so much sir.

[@mohs8789]

All concepts Explained in really simple ,clear and crisp way.👍

[@techTFQ]

Thank you 🙏🏼

[@dannycollins5698]

This was a lot of fun and very helpful! You did an excellent job! Liked and subscribed

[@princenischal3515]

I am really enjoying the video, great and comprehensive content. Thumbs up !!

[@shabanabegum3302]

Thank you so much Toufiq! It is beautifully explained, thoroughly understood..

[@mangeshc1265]

The best explanation ever on concept of Normalization. The concept is perfectly understood. kudos!

[@techTFQ]

Great to hear that

[@sohelshaikh9678]

😮 You are great trainer 😀 Is reason to follow you sir

[@srinubathina7191]

Thank You so much the way of your teaching is excellent sir

[@Fashionsparklers]

I found the best tutor to learn the Database and the it's content is very clear to understand. Thanks for the video.

[@techTFQ]

Glad you liked the content

[@breserskcrimp9310]

best video so far on normalization.

[@pankajdhome]

Very well explained. Thanks a lot for such valuable content 😀

[@spiritualthoughts5813]

That is very easy and well explained to understand for every one. Thank you Sir

[@GabrielOcheGodwin]

Got much value as usual.. Thank for this sir

[@pulokmahato2416]

Superb explanation ❤

[@basavapn6487]

Just awesome as always ❤, Appreciate the knowledge share

[@PrithamPranamyaReddy]

Such a nice way of teaching really the way u r teaching is very well understandable and too full knowledge about subject

[@shashankemani1609]

This is a great video with a very clear explanation. Thanks a lot!👏 Please try to make a video on data modelling and data warehousing. 🙏

[@user-zg8sq2on1c]

i finally understood normalization. subscribed

[@greendaywithtrading7408]

You’re the best SQL trainer .you teach the thought process ,I think Normalization is a complex concept but after watching your video i feel it will be easy !!!! thank you very much for making it so easy to understand

[@techTFQ]

You're welcome ☺️

[@prajackW]

No one can explain it better than you sir ... thank you very much for making it so easy to understand 🙏♥

[@techTFQ]

Thanks buddy, much appreciated

[@subodhpatel3179]

Thank you for making everything crystel clear.

[@belchchitura5116]

Your videos are informative!

[@sher.5027]

Very good I loved the video. The colored data was helpful to understand. Keep your data coloured it helps. And your clear speaking also helps.

[@jaychavhan6267]

Sir this is what I'm searching for from last couple of days .... Thank you so much 🙏🙏

[@techTFQ]

Your welcome buddy

[@user-zh2oz9fe4m]

Great job! Thanks for this extremely useful video!

[@learnCodingTechguru]

Thanks bro nice explanation on Normalisation.

[@user-qx3xz2me3h]

Thank you, thank you so much for knowledge sharing with us in good understanding manner. I Love your content and your way of explanation too.

[@user-tz6ds9uj4m]

You Simply nailed 👍. Simple and crisp. It would be have been nice if you could explain BCNF, 4NF and 5 NF. Your explanation damn good.

[@nitinchoudhary9015]

Real life example loved it..

[@INGCI_3694]

thank you for providing valuable information

[@yegnapage7982]

Thanks for such a quality content!

[@user-ic8dn1xj5w]

Really. understood concept of database normalisation. Kindly make a similarlvideo regarding remaining normal forms

[@josephaliyu1443]

Best explanation I've seen, thank you 🙏

[@techTFQ]

Welcome:)

[@satyabharadwaj7779]

Each time you post a video, I'd always feel that this is the session tailor made for me. This video goes into one of many straight-in and simple to grasp conceptual videos of yours @Thoufiq. If there's anything I can ask, please make videos with mini projects on topics like normalization on complex data. Once again, thanks for sharing such a valuable content!

[@techTFQ]

Thank you Satya .. much appreciated.. and noted on the suggestion

[@sivasrimakurthi206]

@@techTFQ I would be eagerly looking for it :-) every time, there is a video from you, it feels like a obligation for me to watch it :-) as I don't want to miss a valuable lesson that you teach. May god bless you and, keep rocking brother.

[@techTFQ]

Thank you Siva.. very kind of you

[@katharsheriff6846]

Hii !... This video is really good and thnks for giving me a sound knowledge of Normalization and Anomalies

[@pavanareddy4536]

Awesome, can't wait to watch! thank you!

[@ananyamitra6645]

you are the gem of a teacher. Thanks

[@techTFQ]

Welcome:)

[@harithamenon6384]

This helps me to understand the concept clearly.Thank you so much sir!

[@techTFQ]

Glad this helped

[@Arif_Sk123]

Keep up the good work , nice explanation. It helps.

[@anjuaj363]

Very well explained sir

[@sarahliu6891]

super clear omg! you saved me, thank you so much!!

[@ronn_mtb]

Absolutely super-helpful

[@jameselechi6209]

Bro burst my brain, you're too good abeg, I swr. After you na you.

[@naidubora2990]

Great Explanation Bro

[@deepkaan]

Thanks for making this video. I was searching for this type of concept. Finally I came across your content.

[@techTFQ]

Glad it was helpful

[@juberbashakhadumiya8527]

i have watched many normalization videos but your teaching made me to completely understand this concept. Thank you 😊 @Thoufiq bhai

[@techTFQ]

Glad to know that Basha 👍