What is Normalization in SQL? | Database Normalization Forms - 1NF, 2NF, 3NF, BCNF | Edureka

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  • เผยแพร่เมื่อ 21 พ.ย. 2024

ความคิดเห็น • 142

  • @edurekaIN
    @edurekaIN  5 ปีที่แล้ว +38

    Got a question on the topic? Please share it in the comment section below and our experts will answer it for you. For Edureka MySQL DBA training curriculum, Visit our Website: bit.ly/2B5EwLJ

  • @DavidEspinosa21
    @DavidEspinosa21 4 ปีที่แล้ว +334

    1NF: 4:16
    2NF: 5:37
    3NF: 7:37
    BCNF: 9:52

  • @alexandrospanag
    @alexandrospanag 4 ปีที่แล้ว +365

    jesus christ you took 15 minutes when my teacher took more than 6 hours and i still hadnt learned anything from! You are a genius sir thank you for the video!

    • @edurekaIN
      @edurekaIN  4 ปีที่แล้ว +39

      Thanks for the compliment! We are glad we could help. Do subscribe to our channel to stay posted on upcoming tutorials.

  • @shatakshipandey3942
    @shatakshipandey3942 2 ปีที่แล้ว +24

    When my professor was teaching I couldn't understand what was even the need for normalisation let alone itself but u made it clear in the very start. Now my all doubts are clear regarding this. Grateful that I came through this video. Helped alot 👍

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว +2

      Hey:) Thank you so much for your sweet words :) Really means a lot ! Glad to know that our content/courses is making you learn better :) Our team is striving hard to give the best content. Keep learning with us -Team Edureka :) Don't forget to like the video and share it with maximum people:) Do subscribe the channel:)

  • @bhanupriya2244
    @bhanupriya2244 2 ปีที่แล้ว +6

    I had left only 1hr for xam I jst saw this video twice nd written the same question, the explanation was very clear can understand easily

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว +1

      We are very glad to hear that your a learning well with our contents :) continue to learn with us and don't forget to subscribe our channel so that you don't miss any updates !

  • @StateEnemy01
    @StateEnemy01 3 ปีที่แล้ว +49

    I have a textbook that 'explains' this subject. That book could have been written in hieroglyphs and it would make more sense to me. Thank you so much for the very clear explanation! Helps me a lot!

  • @mayanksoni214
    @mayanksoni214 2 ปีที่แล้ว +2

    And this is how I feel in love with the DBMS Subject.

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      You're welcome 😊 Stay connected with our channel and team :) . Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @haniffaris8917
    @haniffaris8917 2 ปีที่แล้ว +36

    But wasn't the table in the 3NF example not yet in 2NF? Isn't Subject (Non-prime attribute) is partially dependent on Subject Id (candidate key)?

  • @maryamfatima5882
    @maryamfatima5882 ปีที่แล้ว +7

    very clean and clear session

    • @edurekaIN
      @edurekaIN  ปีที่แล้ว

      Glad you think so! Keep learning with us..

  • @navnathbhure3789
    @navnathbhure3789 2 ปีที่แล้ว +2

    One of the best lecture video i have ever watched ..

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Glad it helped

  • @sneharay60
    @sneharay60 2 ปีที่แล้ว +8

    The video was really very helpful to me. It's because of the presence of teachers like you that students can understand the topics instantly especially those who don't have tutors

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      We are super happy that Edureka is helping you learn better. Your support means a lot to us and it motivated us to create even better learning content and courses experience for you . Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @mudassiribad2910
    @mudassiribad2910 ปีที่แล้ว +1

    Thank you sir very grateful explanation in simple method very helpful for me by these explanation i had cleared all the doubts regarding this concept

    • @edurekaIN
      @edurekaIN  ปีที่แล้ว

      Hi : ) We really are glad to hear this ! Truly feels good that our team is delivering and making your learning easier :) Keep learning with us .Stay connected with our channel and team :) . Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @burcukaradag2975
    @burcukaradag2975 ปีที่แล้ว

    Thank you, you are awesome this is the fifth video that I ve been watching for normalizations, I just understood with your video, thank you very much

    • @edurekaIN
      @edurekaIN  ปีที่แล้ว +1

      You're welcome 😊 Stay connected with our channel and team :) . Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @dakaninongpluh4556
    @dakaninongpluh4556 2 ปีที่แล้ว +5

    thank you sir ,very simple and clear explanation

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      You're welcome 😊 Glad it was helpful!!! Keep learning with us..

  • @vaishnaviv7113
    @vaishnaviv7113 3 ปีที่แล้ว +7

    It's my exam today and that was really helpful thank you very much

  • @Vishnu-ix2di
    @Vishnu-ix2di 2 ปีที่แล้ว +1

    Thanx for the video. I got clarity on this topic by this video.

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      You're most welcome :) Glad it was helpful !!

  • @pranavwagh9350
    @pranavwagh9350 2 ปีที่แล้ว +15

    what is difference between 2NF and BCNF ?

  • @aj7ttt
    @aj7ttt 3 ปีที่แล้ว +6

    when I need to understand some topic, I just search topic name + Edureka ✨

    • @edurekaIN
      @edurekaIN  3 ปีที่แล้ว +1

      Hey:) Thank you so much for your sweet words :) Really means a lot ! Glad to know that our content/courses is making you learn better :) Our team is striving hard to give the best content. Keep learning with us -Team Edureka :) Don't forget to like the video and share it with maximum people:) Do subscribe the channel:)

  • @mahimsd7645
    @mahimsd7645 5 ปีที่แล้ว +16

    Congratulations for 1 million subscribers ...

  • @Aspen-s3p
    @Aspen-s3p 2 ปีที่แล้ว

    My exams tommorow, this video really helped alot.

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว +1

      Thank you so much : ) We are glad to be a part of your learning journey. Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @dhaneshpt8641
    @dhaneshpt8641 ปีที่แล้ว +1

    Thank you...

  • @djgulston
    @djgulston 2 ปีที่แล้ว +3

    What a man! Brilliant explanation! Thank you for this!

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว +1

      Thank you so much for the review ,we appreciate your efforts : ) We are glad that you have enjoyed your learning experience with us .Thank You for being a part of our Edureka team : ) Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @kratikakothari6848
    @kratikakothari6848 4 ปีที่แล้ว +14

    Great explanation in jus 13 minutes 🙌👏 Understood the whole concept

  • @mohanreddy2404
    @mohanreddy2404 2 ปีที่แล้ว +2

    I think no one can explain better than you..

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Thank you 😊 Glad it was helpful!

  • @afsardesign
    @afsardesign 2 ปีที่แล้ว +4

    Really it is very helpful for me to get clarity about this topic for my upcoming exam
    Thanks a lot for giving us knowledge 👍👍👏

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Hi : ) We really are glad to hear this ! Truly feels good that our team is delivering and making your learning easier :) Keep learning with us .Stay connected with our channel and team :) . Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @jeevitham205
    @jeevitham205 3 ปีที่แล้ว +1

    Clear explanation is super Sir. We need more concept i.e. about keys db commands. How to write queries and also 4nf...

    • @edurekaIN
      @edurekaIN  3 ปีที่แล้ว

      It is great to know that our contents are helping you learn better and learn easy ! We are super glad to know and have learners like you with us. We'll definitely take your suggestion to the team and create content on this ! Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @karrisateesh7938
    @karrisateesh7938 2 ปีที่แล้ว +1

    very good explanation.

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Glad you think so!

  • @pavanputluru3417
    @pavanputluru3417 5 ปีที่แล้ว +35

    What is the difference between 2nd and 3rd? By looking at the examples in the video both looks same. Please let me know thanks

    • @edurekaIN
      @edurekaIN  5 ปีที่แล้ว +16

      To make sure that the database must in 2NF, the database should be 1NF and should also have a single-column primary key. Also, to make sure that the database must in 3NF, the database should be in 2NF and must not have any transitive functional dependencies. If you want an example on Normalization, refer to the following article:www.edureka.co/blog/sql-tutorial/#normalization

  • @shaikmohammed9981
    @shaikmohammed9981 2 ปีที่แล้ว +1

    Good explanation👏🏻👏🏻👏🏻👏🏻

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Thank you 😊 Glad it was helpful!!

  • @andrewkoh9678
    @andrewkoh9678 4 ปีที่แล้ว +5

    I understand much clearer now, Thank you!!

  • @hopeislife1651
    @hopeislife1651 4 ปีที่แล้ว +1

    Understood sir, thank you

  • @alvarobusquets
    @alvarobusquets 2 ปีที่แล้ว

    Edureka is the best school 👍

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Good To know our videos are helping you learn better :) Stay connected with us and keep learning ! Do subscribe the channel for more updates : )

  • @amanbhargavaofficial
    @amanbhargavaofficial 3 ปีที่แล้ว +1

    Thank you😊😊😊

  • @saltech2024
    @saltech2024 2 ปีที่แล้ว +2

    Great explanation!!
    This may come in handy and clearly understood the concept when you've got a project at hand

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Thank you so much : ) We are glad to be a part of your learning journey. Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @jishajustin9523
    @jishajustin9523 2 ปีที่แล้ว

    Good explanation. I got it.

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Thank you for you time in giving a feedback :) We are glad that you are learning from our videos! Stay connected with our channel :)

  • @maneeshapathipati2084
    @maneeshapathipati2084 2 ปีที่แล้ว +1

    Thank u sir it's very ...nice

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Most welcome 😊 Glad it was helpful!

  • @mumbaikachallenge5526
    @mumbaikachallenge5526 2 ปีที่แล้ว +1

    Superb simple and short!❤️

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Thank you 🙂

  • @matthewdodson9422
    @matthewdodson9422 2 ปีที่แล้ว +3

    THANK YOU for the concise and clear examples!

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Glad it was helpful!

  • @lorenzoliswaniso591
    @lorenzoliswaniso591 2 ปีที่แล้ว +1

    Thanks🙏🏽

  • @livefootballmondiale2302
    @livefootballmondiale2302 2 ปีที่แล้ว

    very interesting and explicite and easy to understand

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Good To know our videos are helping you learn better :) Stay connected with us and keep learning ! Do subscribe the channel for more updates : )

  • @nvkchannel8201
    @nvkchannel8201 3 ปีที่แล้ว

    thanks Sir...too good

  • @anexusthanatos4021
    @anexusthanatos4021 2 ปีที่แล้ว +1

    Great video!! 👍

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว +1

      Thanks for the visit

  • @someshwarans2889
    @someshwarans2889 2 ปีที่แล้ว

    awesome session sir but i need 4nf and 5nf..

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Thanks for showing interest in Edureka kindly visit the channel for more videos our content creators are eagerly waiting for your suggestion to make new videos on your interest :) DO subscribe for the video update

  • @sarmmadd
    @sarmmadd 2 ปีที่แล้ว

    vv good.
    explained ccoly. aprreciate it boss.

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      We are very glad to hear that your a learning well with our contents :) continue to learn with us and don't forget to subscribe our channel so that you don't miss any updates !

  • @MUHAMMADOWAIS-u9j
    @MUHAMMADOWAIS-u9j ปีที่แล้ว +1

    Very nice.

  • @himanshupande3707
    @himanshupande3707 3 ปีที่แล้ว +2

    awesome explanation...clear and precise..

  • @mahesh97413
    @mahesh97413 3 ปีที่แล้ว +1

    Very Nice explanation tq.

  • @binoyaravind1025
    @binoyaravind1025 2 ปีที่แล้ว +1

    Great session with examples

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Glad you liked it!

  • @jpoezi
    @jpoezi 3 ปีที่แล้ว

    sir you are a genius

  • @delanocripps4339
    @delanocripps4339 2 ปีที่แล้ว

    Idea!! Keep going bro

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Thank you so much : ) We are glad to be a part of your learning journey. Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @flipflop5189
    @flipflop5189 2 ปีที่แล้ว

    very informative, thank you for posting this!

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว +1

      You're welcome 😊 Stay connected with our channel and team :) . Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @complexity8851
    @complexity8851 4 ปีที่แล้ว +6

    I wish I had this video when I was in College

  • @Peeves22
    @Peeves22 4 ปีที่แล้ว +5

    Amazing breakdown of a complex concept - thank you!

  • @sajidmanzar
    @sajidmanzar 3 ปีที่แล้ว +5

    What about 4NF and 5NF? Are these two NF really needed in real scenario?

  • @kapilkarki1696
    @kapilkarki1696 2 ปีที่แล้ว +1

    Thank you for this beautiful and clear explanation bro

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      Hi : ) We really are glad to hear this ! Truly feels good that our team is delivering and making your learning easier :) Keep learning with us .Stay connected with our channel and team :) . Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @azmatkhan3895
    @azmatkhan3895 3 ปีที่แล้ว

    Good explaination Sir...!

    • @edurekaIN
      @edurekaIN  3 ปีที่แล้ว

      Thank you so much for your review on our channel  Great to hear that Edureka is helping you learn better . We’ll strive to make even better learning contents/courses in the future ! Do subscribe the channel for more updates : )

  • @aatmakumar4631
    @aatmakumar4631 2 ปีที่แล้ว +1

    Nice class

  • @franzbiberkopf9179
    @franzbiberkopf9179 4 ปีที่แล้ว +1

    Thank you very much for this from Rome.

  • @manojreddy444
    @manojreddy444 3 ปีที่แล้ว +1

    Thanks

  • @priyanshu6465
    @priyanshu6465 2 ปีที่แล้ว +1

    jeez thankyou

  • @pcgmotorsport9299
    @pcgmotorsport9299 3 ปีที่แล้ว

    Thank you so much, awesome video

    • @edurekaIN
      @edurekaIN  3 ปีที่แล้ว

      Thank you for your review : ) We are glad that you found our videos /contents useful . We are also trying our best to further fulfill your requirements and enhance your expirence :) Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @Zed.1836
    @Zed.1836 4 ปีที่แล้ว +2

    this was very helpful thank you for making this!

  • @jackieboi321
    @jackieboi321 4 ปีที่แล้ว +1

    Excellent video

  • @anshumanster
    @anshumanster 4 ปีที่แล้ว +1

    Excellent

  • @muhammadkamranjaved2424
    @muhammadkamranjaved2424 3 ปีที่แล้ว

    Man you are great!!!

    • @edurekaIN
      @edurekaIN  3 ปีที่แล้ว

      Thank you for your review : ) We are glad that you found our videos /contents useful . We are also trying our best to further fullqfill your requirements and enhance your expirence :) Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @moulimallina7501
    @moulimallina7501 5 ปีที่แล้ว +2

    Tq edureka, tq professor

  • @vidyabukitgar
    @vidyabukitgar 5 ปีที่แล้ว +1

    Thank you so much sir nice explanation !!

  • @marc4594
    @marc4594 4 ปีที่แล้ว

    Thank you man, you are great!

  • @rohan_btr
    @rohan_btr 8 วันที่ผ่านมา

    I've exam at 10:30 and now it's 8:55 LOL. Thanks anyways :)

  • @ayamohammed7655
    @ayamohammed7655 4 ปีที่แล้ว

    Thank you !!

  • @latieshsai5192
    @latieshsai5192 ปีที่แล้ว

    sir pls put a video on cyber forensics sir the branch of future cyber security way that proves to be the correct way

    • @edurekaIN
      @edurekaIN  ปีที่แล้ว

      Thanks for showing interest in Edureka kindly visit the channel for more videos our content creators are eagerly waiting for your suggestion to make new videos on your interest :) DO subscribe for the video update

  • @sowmyasunkara7136
    @sowmyasunkara7136 4 ปีที่แล้ว

    Thank You sir.

  • @gauravarora8405
    @gauravarora8405 4 ปีที่แล้ว +2

    difference between 2nd and 3rd normal form

    • @edurekaIN
      @edurekaIN  4 ปีที่แล้ว +6

      In 2NF non-prime attributes are allowed to be functionally dependent on non-prime attributes.
      In 3NF non-prime attributes are only allowed to be functionally dependent on Super key of relation.
      No partial functional dependency of non-prime attributes are on any proper subset of candidate key is allowed. Hope that solves your query.

  • @arshiya_83
    @arshiya_83 10 หลายเดือนก่อน +1

    thank you so much for amazing session sir 🙂

    • @edurekaIN
      @edurekaIN  10 หลายเดือนก่อน

      Most welcome

  • @gretelgomezrodriguez4006
    @gretelgomezrodriguez4006 4 ปีที่แล้ว

    Great explanation. Thank you!

  • @mohdzarrar2793
    @mohdzarrar2793 4 ปีที่แล้ว +2

    Great explanation.

  • @pavankumarreddykattameddi8385
    @pavankumarreddykattameddi8385 3 ปีที่แล้ว +1

    Can u please explain bcnf and super key

  • @Abhi_JW999
    @Abhi_JW999 4 ปีที่แล้ว

    Thank you

  • @chodingninjas7415
    @chodingninjas7415 3 ปีที่แล้ว

    best explanation

    • @edurekaIN
      @edurekaIN  3 ปีที่แล้ว

      We are super happy that Edureka is helping you learn better. Your support means a lot to us and it motivated us to create even better learning content and courses experience for you . Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @anushanelevalli1407
    @anushanelevalli1407 2 ปีที่แล้ว +1

    🙏 srir

  • @s.r.chockklingam3991
    @s.r.chockklingam3991 2 ปีที่แล้ว +1

    What's about 4nf & 5nf

  • @arsha0206
    @arsha0206 4 ปีที่แล้ว

    well explained

  • @ekant1992
    @ekant1992 5 ปีที่แล้ว +1

    And then come NoSQL DB which difies all these ... tech world is bizzare..

    • @edurekaIN
      @edurekaIN  5 ปีที่แล้ว +9

      SQL and NoSQL are used to store different formats of databases. So, both of them stand good against each other and you have to choose which type of database can help you and your organization.

  • @shivaprasad-kn3kw
    @shivaprasad-kn3kw 4 ปีที่แล้ว

    can a table have two primary keys

    • @edurekaIN
      @edurekaIN  4 ปีที่แล้ว +4

      We can have only one Primary Key on a table. Keeping this in consideration and to enforce database normalization (third normal form) databases don't allow multiple primary keys on a table. You can create primary key spanning multiple columns. You can also create a UNIQUE constraint on a NOT NULL column.

  • @prajwalbhat275
    @prajwalbhat275 5 ปีที่แล้ว

    Nice sir

  • @vadlapudirajesh4183
    @vadlapudirajesh4183 ปีที่แล้ว +1

    ❤❤❤❤❤❤❤

  • @kashyapdamodar7338
    @kashyapdamodar7338 3 ปีที่แล้ว

    I couldn't get past the distraction caused by the instructor pronouncing Data as Deeeta. Seemed like a good tutorial otherwise, so truly its my loss.

  • @harshitsrivastava9903
    @harshitsrivastava9903 3 ปีที่แล้ว

    😇😇

  • @pravallikamanepalli1061
    @pravallikamanepalli1061 2 ปีที่แล้ว +2

    Thank you edureka

    • @edurekaIN
      @edurekaIN  2 ปีที่แล้ว

      You're welcome 😊

  • @017gowthamarajaam8
    @017gowthamarajaam8 3 ปีที่แล้ว

    thanks a lot

  • @shravyashetty3115
    @shravyashetty3115 3 ปีที่แล้ว

    thank you so much

    • @edurekaIN
      @edurekaIN  3 ปีที่แล้ว +1

      You're welcome 😊 Stay connected with our channel and team :) . Do subscribe the channel for more updates : ) Hit the bell icon to never miss an update from our channel : )

  • @evnraja
    @evnraja 4 ปีที่แล้ว

    well explained

  • @badhavaththukaram9538
    @badhavaththukaram9538 4 ปีที่แล้ว

    good 👍

  • @rainboww1515
    @rainboww1515 2 ปีที่แล้ว +1

    Thank you

  • @masadamsahid
    @masadamsahid 2 ปีที่แล้ว +1

    Thanks

  • @surya.k7793
    @surya.k7793 3 ปีที่แล้ว +1

    thank you

  • @aniketrajapure8251
    @aniketrajapure8251 ปีที่แล้ว +1

    Thank You