Lec 21: What is Canonical Cover in DBMS | Minimal cover Irreducible with example

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Ma'am you are the best teacher for me..You have encouraged me to study all these subjects..I have lots of subjects in my current fourth sem....I have dbms,algorithms,java,web(html,css,javascript,php,nodejs,angularjs),Operating systems in just one semester..I know it is headache to study all these subjects in just one semester i.e. 4 months for me..It is driving me crazy...Thanks a lot for your help.I have understood all the concepts because of you in algorithm and OS..Please do all the other subjects as well...You are the best teacher and mentor for me...

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[@_IshikaGupta]

Another canonical cover I got for this ques is :{B->C, C->A, C->B, A->C}

[@NikhilKumar-ry7eg]

yep same

[@ranjeet5806]

same . I think she messed up in AC->B . instead of removing this AC->B as C->B exist. She change AC->B to A->B.

[@rohmanatasi1771]

B--->C , C---->A this means , B---->A , according to transitivity. so i GUESS , we can do it like this {B->A,C->B,A->C}. I got the same answer btw :/

[@CYB3r_D3m0n]

@@ranjeet5806 like she said there are many ans depending on which u choose to eliminate , so just follow the rules

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@@ranjeet5806 she is correct only

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Hi ma'am, I am like a new student on this course. Really loving it!! In this video you promised that you'll make a video on multi valued FD and 4NF and 5NF. Please make a video on them too.. I'm really enjoying this video series.. I have learnt alot. I'm about to complete the whole course and now I'm having alot of confidence on DBMS. Before your videos I have tried to learn from geeksforgeeks and a udemy course but I really like your way of teaching. You are giving alot of knowledge to the students like us for free.. I really appreciate the hard work of yours.

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[@manojdeva379]

Wowww finally got the concept of canonical cover😍 Tq mam

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Well done bro!

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Hi ma'am, I am like a new student on this course. Really loving it!! In this video you promised that you'll make a video on multi valued FD and 4NF and 5NF. Please make a video on them too.. I'm really enjoying this video series.. I have learnt alot.

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This literally helped me so much thank you! Youre a great teacher

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Extraordinary lecture Really helpful!!!

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For 1:00 part iPATE is now latest examination in India . And mam for you ( I am having a habit of watching lectures at a playback speed of 1.75x and I did so with yours too , by doing so I was surprised please check it once . And mention me 😊

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4:00 thank me later

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Thank dyano

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XD

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The last step with finding the closure of every one is a bit tedious, but at least now I feel like I understand how to do the whole process. Thanks!

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Excellent teaching.Your students are very lucky

[@aishwaryakg2411]

Is c->a, b->c, c->b, a->c a canonical form??? Please do tell please....

[@liemle8084]

thank you teacher, from VietNam

[@csboi5235]

notes : 14:43 : remove the extraneous attributes from left side and remove the trivial dependencies.

[@vaalarivan_p]

extraneous attributes : 7:00

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Thanķs very much for your reply. Don't bother about delay.

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[@keerthipriya3080]

at 14:23 you did wrong mam. if A->C then why we discard C from AC->B?

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Madam if you just move from the board after completing the topic then we can take screenshot.

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Tysm for this example 😊

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Hello Jenny. Please can you suggest me the books you have read about the database?

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[@c.danielpremkumar8495]

7:30 this is as good as splitting LHS of an FD (which is not allowed). Since AB-C is not the same as A-C & B-C. Clarification would be appreciated.

[@rohandilip4173]

A-C means a can derive c.(If there is a there will be c for sure). B-C means that b can derive c. (if there is b there will be c for sure) AB-C means that a and b both combined can be used to derive c. The values of both a and b determines the value of c. so we can only say that if both are present,then only c is present and not if one of them. Hope its clear. Anyway sorry for the delay in reply

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[@ranjeet5806]

I got this ques answer :{B->C, C->A, C->B, A->C} I think she messed up in AC->B . instead of removing this AC->B as C->B exist. She changed AC->B to A->B.

[@popeyetech9634]

Yes

[@pruthviraghav2529]

Yes she messed up in 2nd step

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lecture starts at 4:11

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Ma'am can you explain algorithms and how to find the complexity of the programs

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can you please make a video on ER model and relationship...

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beautiful

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Maam is this a full course on DBMS as I am a CSE student and I need a full course to prepare for my semester exams.

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Mam what is best platform for full python course learning

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thanks

[@nitingovil391]

Consider a given relation R=(P,Q,R,S) with following set of FDs: PQ→R PS→Q QS→P PR→Q S→R Find the minimal set of FDs from the above set. Please help

[@simplegupta9142]

Bro I tried its { PQ -> R, QS-> P, PR->Q, S->R}

[@nitingovil391]

@@simplegupta9142 thank you I got the same💖

[@simplegupta9142]

@@nitingovil391 welcome💜

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Closure of AC ={ A,C,B} Also C--> B so we can ignore C in AC, It will not impact on the whole function.

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Thanks ma'am🥹

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please, do you have a video for multivalued dependency and 4th normal form?

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is conical cover and minimal cover is same??

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Yes

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mam there is only 23 videos of DBMS on playlist what about remaining 😥?

[@user-gw8iz4qf9r]

Can you explain how to compute if there is transitive FD exists in the below .Can you reply in the chat box a) AB → C, DE → C, and B → D b) AB → C, C → D, D → B, and D → E. c) A → E, AC → E, B → D, D → A, and E → B. d) A → B, B → C, C → D, D → E, and E → A.

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when will you post maam about database transaction?

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What is data base transaction?

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Is this for begineers?

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Pls put videos on process synchronization 🙏, I feel difficult to understand

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mam waiting for next video on 4nf and 5nf

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Ma'am, my answer is F = {C -> A, AB -> C, AC -> B} even if I've followed the rules...

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I got c>a, b>c, a>c,c>b By using c>b in step 2

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How to get DBMS notes please give DBMS notes link

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