5th Normal Form (5NF) | Join Dependency | Database Normalization
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- čas přidán 2. 08. 2024
- For complete DBMS tutorial: www.studytonight.com/dbms/
In this video, we will learn about the 5th Normal Form and Join dependency. Join dependency is a bit tricky to understand, but we have tried to not to focus on it and rather explain the concept of normalization of a given table. We have also covered how you can decompose a table (relation) to make it satisfy the 5th Normal Form.
Introduction to Normalization: • Basic Concept of Datab...
First Normal Form: • First Normal Form (1NF...
Second Normal Form: • Second Normal Form (2N...
Third Normal Form: • Third Normal Form (3NF...
BCNF: • Boyce-Codd Normal Form...
Fourth Normal Form: • 4th Normal Form (4NF) ...
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You are amazing! 😄😄Thanks for making me laugh while studying.. Cuz I was so in stress
😁
Roses are red,
Violets are blue,
Our professor teaches us from CZcams,
What about you?
😝
How to: Easy way to teach student
Red is the rose,
Blue the violet
If we table this prose,
It all forms fulfilleth.
| Plant | Color |
|-----|-----|
| Rose | Red |
| Violet | Blue |
Doesn't it? 😏
Epic memes. I've never laughed during a ed video. Good job!!
seriously
I don't know any of those memes! And that's how one realizes s/he's getting old... :O
Please make a video with more examples. 5NF is very confusing. The previous normal form videos are excellent.Thank you!
Thanks, I'm confused.
🤣🤣
Why ?
🤣🤣🤣🤣🤣my god... Then y u r thanking him dude🤭😅😅😅🤣🤣
@@explorer2375 r/whooosh
Confused or confuse
STUDYING PROPERLY WITH OUT GETTING BORING.THANK YOU FOR MAKING THESE KIND OF EDUCATIONAL VIDOES.
So as I understand:
- If the main table can not be recreated (i.e. join dependency does not exist) it is in 5nf and should not be decomposed.
- And if the main table can be recreated (i.e. join dependency exists) we should decompose it to be in 5nf.
am I correct?
Yes absolutely. But that did confused a lot of viewers. Fifth Normal form is very use-case specific. And if you have never designed any database for any app/website, it can become a bit difficult to grasp.
Merry Christmas :)
Thanks a lot😊
Thanks man
Thankyou bud;)
in short it should not have join dependency and if it has decopose the table in loseless decompostion way
so no join dependency and loseless join decompostion
Hey Master Blaster... It was both Illuminating and fun watching these normalization videos !!
I am more confident in my DBMS now.
Thanks sir, really I got the 5NF as well as one more thing why it is important to study each concept from each and every corner.
While Studying ER diagram theory I never expect that it would help me in such a way .
Thank you 👏. I am able to understand the Normalization concept ✌.
I have created the DB tables to learn SQL and T-SQL. However, I am not able to fetch few records even-though data present in it also query is satisfying the conditions 😒😒. Post observing this video I altered the table with the help of ER diagram.
I recommend viewers to practice and think practically to understand the Normalization concept.
You are awesome.. Never felt better.. Please don't stop making videos!
Never understood 5nf, until this video - this was explained super cleanly ty v much!
Your content is really very good. I saw all the Normal Forms from your channel and literally understood everything but 5NF was really a bit confusing.
Ok, will work more on this video then. Thanks for your input and Merry Christmas :)
One of the best explanations ever seen on youtube boss. Keep going man !
this type of education we need...where teachers are being funny while teaching :D
Great series about the normal forms. First time I really understood them clearly. Thanks for your service to humanity :) Subscribed
Glad you like them!
Awesome... Never knew study material can make me laugh
Thank you for all of your videos. It's helpful. Is it possible to show us an example where aTable has join dependency and should be decomposed? That will be very helpful.
BGM at 4:57 So Emotional but I laughed like hell🤣🤣
Thank you so much Sir. Your videos are really helpful
Just finished the series, great work ! although these videos are almost 2 years old the memes are still alive. These videos were very helpful thanks for making them.
Glad you enjoy it!
This was hard to understand but after watching it two times finally I got it. Thanks.
The way u edit is awesome yaar😂😂
It literally saved my exams, Thankyou soo much!👍
Awesome explanation which I have ever seen on youtube about 5NF, thanks bro....
Engineers are in need of, such kind of to the point videos.
loved the series😍😍😍😍
Hello sir...
Please make a video on Lossless join and Dependency preserving decomposition.
This is like watching a web series and having a cliff hanger for second season.
cant we create a table for supplier to customer such that includes financial information related to debit and credit using business adminstration methods ?
Thanku so much sir,ur videos are really amazing and helpful
then what about 4NF condition? Multivalued Redundancy is not preserved then :/ ; can you elaborate please ?
This was clearly taught. Thank you! How does one quickly discover whether breaking down tables will result in a loss of data?
So, when my decomposed table cannot standlone can provide some info of the attributes that are in the table but requires to join together to make sense is join dependency. ( Did i make any sense here)
so they needed to be joined to draw conclusions.
Did i get it right or missed something.
Please reply sir
Thank you, love your videos.
Explain in detain and simple form sir.
Thanks
which software did you used for making the video sir!
You are awesome man :) Thanks
Great Explaination, Thank You So much Brother
Very well explained! Loved watching this! 🤣🤣♥♥
Love the way u teach, its fun
Lossy dependency and loss less dependency are two divided stages from join dependency.in lossy dependency ,if we join both table a and b we get some redundancy or may data losses but in case loss less dependency the data can't be lossed and redundancy occurred.
How to decompose? Is there a specific method or constraint?
Awesome.❤
Thank you, the best tut's on this subject
Lol..memes between the actual educational content! AMAZING :)
Good example. Thank you.
Great explanation 🙂 thank u sir..
Awesome content👌🏻
For all other NFs, I have made notes from your videos. But for 5NF, I have mentioned "watch studytonight video" in my notes.
how these qns will appear in exam? like directly "do a table for all nfs?" or like any twisted way?.. if asked what to write and how much should we write for 16marks(i get it for 16m)?
Best video
Thank you sir.
I think this helps to understand better: Let's say both sellers S1, S2 sell products P1, P2 and user U1 uses P1, P2 and U1 buys from S1, U1 buys from S2 also. Now to Join the tables(recreate the big one) we can't say whether user U1 bought product P1 from S1 or S2, since both sell P1 and U1 buys from both S1 and S2. Hope it helps, thank you.
Thank you🙏
Amazed by this extra-ordinary explanation....well done💯💯
Thanks for the comment.
True learning with enjoyment 👍👌
Thank you :) Checkout our other videos too and please Subscribe :)
Guys just focus on this. there is a join tables. if we break that join tables and there is a lost information, then it was a join dependency. then we have to do 5NF. You sir are the best at explaining the concept, thank you
nah man, that's when join dependency DOESNT exist
The truth is exact opposite of this
@@aydict Does it mean that when we break the table it cant cover all the fields
because there was join dependency. until we break it was right
I am very thankful for your explanations. But i am a bit confused. I understand that if breaking the table leads to information loss, we shouldn't do that. But in the case of information creation ? Logically it's the same but can you please confirm it ?
You r amazing. Thanks a lot🙏🙏🙏
Most welcome 😊
So finally I understood db normalization. Can you please create video for db joins as well?
Subscribed at 4:58 ahahahahah thank you sso much for the video please make more!! :D
Amazing lecture ,thanks a lot
Pls make video on other topic as well
That would be so helpful for students
Other topics like? Please share, and I will definitely try to make videos on them.
@@Studytonight all dbms topics
@@zerosolution115 Ok then! I will get started with it :)
Could we summarize the 5NF by the following : "The table should be in 4NF, and only candidate keys of the table should have independant dependencies to more than one column." ?
thanks a lot
Thnku for confusion
Saw all the Normalisation videos. You are fantastic. You teach better than my college profs.
5th NF you explained negative case of when not to decompose the table. Can you explain positive case, of when you can decompose the table?
Ok, let me come up with an example and share.
Thank u sir. Please can you do a video on crash recovery?
Very nice explaination of the topic. My textbook is far too formal and precise in definition to make understanding of the normal form concepts.
Thank you 😊
Got to say this... the humour in every content really calms down the exam stress....😁
Can u bring question on determining the highest norml form of a given database
In fact, using only the data you provided, you CAN imply that ACME sells the 72X SW to Ford, but as soon as Ford purchases a 72X SW from another supplier, you can no longer imply this. You cannot, however, imply which supplier provides an OBD II to Mercedes.
Can you please explain "Inclusion Dependency" and "DKNF", your teaching is awesome, Thanks
ye konsa naya normal form nikla bhai
The vedios are so easy to understand than lectures!!!
You should check our website too, studytonight.com
bro you are epic.
ACME is related to 72x sw and Gear L . The table has 3 columns. then why is it in 4th normal form?
I was waiting for this, today is my exam 😊.
Studying in CU?
Bro RU
back aayi ? :P
This normal form makes me more confusion 🙄 and previous normal form is good and better explanation thanks u
Best way to teach especially with memes XD
Can I know how data was lost in the example you have taken in a lecture video
nice teaching
how to check whether division is lossy or lossless
Ok. So, I have a big table that should comply with the 5NF. If I want to go this far, should I redesign it for each normal form until I reach the fifth?
I think so because each higher normal form builds upon the lower normal form.
thanks
Hi!! I really loved your explanation👍👍 but can you do a video of 5NF a more little detailed with some more examples
I will try!
👏👏👏👏
Plz upload videos on transaction..
how can we say that there IS no multivalued dependency in this table???? and if yes there is MVD then it won't be in 4NF
so. Why we need a 5NF? Is there some problem 4NF cannot solve?
Can you upload another video for 5NF with new example?
Ok.....How to bring table to 5nf?
What about an example that is 4NF but not 5NF?
YOU ARE TEACHING ME, YOU AREN'T SUPPOSED TO MAKE ME LAUGH LIKE THAT!!!....or can you...looks like teachers also have a good sense of humor, we just haven't seen a lot of em' yet.
Best
Dear Sir, Yor are explained first class. I have a doubt, What is the problem we have in the original table? If we have any problem only we can decompose. And give the example for no losing information after decomposing in 5th normal form.
Is there any 6NF or 7NF also exists?
Nope. Ain't 5 more than enough :D
I am confused 😃so I can't explain in exam 5nf 😇
why cant we say ACME is selling 72XSW to FORD from the decomposed tables? 72XSW is sold only by ACME and ALWAT, and ALWAT dont have FORD as a customer. From this we can say ACME is selling 72XSW to FORD right?
Ok, let me give this straight....(correct me if it's wrong)
If there is a 4NF table which is actually can be decomposed into separated tables and while we try recomposed it again into one (by using join operation), the joining table and the original table are same (true) that's mean the table (The 4NF table) doesn;t meet 5NF criteria ?
So:
If 4nf > can be separated
that's already violate 5NF rules ?
Did you get it. After one week
@@saramanaf715 I've been searching on Google and this is my current answer for now
@@raindeca111 it is just so confusing
Sir can you explain 5NF with join dependency
thanks for making me laugh :) hope you're having a great day
Glad you enjoyed