Converting ER Diagrams to Schemas | SQL | Tutorial 23 

(0:39) STEP 1 : Mapping of Regular Entity Types (1:41) STEP 2 : Mapping of Weak Entity Types (2:49) STEP 3 : Mapping of Binary 1:1 Relationship Types (4:22) STEP 4 : Mapping of Binary 1:N Relationship Types (6:25) STEP 5 : Mapping of Binary M:N Relationship Types (8:43) Define the relationships (9:36) Create an actual database

This video is 10x better than my university professors lecture :D

Wow an entire week of lecture summarized in just 5 minutes of a video on 2.5x speed. Thanks a lot, great work!

Thanks for all that. I made a lot of notes and screen prints and now I'm going to create my own database. I expect to re-watch some sections a few times but the series has given me a good insight into SQL. Thanks!

Best explanation of these concepts I've ever heard and I've been trying to get it for a while. Thanks. Teaching is clearly your calling.

Thank you. After reading about entities and relations for two hours, this summed it all up perfectly!

Thank you, I attended all the course it was really helpful. World needs people like you thanks for your time and your great way of teaching.

Amazing work guys! The way you made the whole loop, starting with the table schema in the low level and finishing the same schema in the hight level. Splendid! Thank you! I enjoyed the journey!

You just cleared all the mess I had in my head.. Thanks for sharing these videos for free..

I am currently taking an intro to data analytics class for my masters and your tutorials have helped me so much! You are an amazing teacher for newbies like me.

Thanks Mike for this professional Tutorial. Keep up the good work.

I am Taiwanese, your course is very good, thanks for teaching!

U saved us bro. we had system diagram projects and this 100% made everything clearer

Hi Mike, thank you to take your time to do this course that is amazing.

Thanks for making SQL learning easy for us Mike

This course got me introduced to SQL and I am starting a Project right away!

Thank you so much for making all videos! You are legend.

Thank you very much for this videos! I have taken the codeacademy and the Alison courses before yours. I can say your videos were a way better, more simple and direct than theirs.

You are so clear in your explanation!

Thanks for summarising 2 lectures of 1 hour each in 10 mins, and way easier to grasp!!!

Dude. This video and the tutorial before it helped me so much with my database class. Thank you!!!!

thanks bro ur playing a great role to the entire world i real benefit from ur pieces

I have finished today this tutorial, thank u a lot for all this detailed explanation!!!

this is good stuff! thank you Mike. I destroyed my head learning this via book

one of the best explanations i've ever seen

Yay I finally completed the course!

the bestt! i love your tutorials they are the best :))) thankss

Awesoem Playlist Great ending aswell ... is like back to the begining :)

Fabulous! God bless you!

Wow Mike, I just wanted to say that you rock. Your teaching techniques are so easy to follow. Keep it up ma peep.

thanks man you have no idea how this helped me

Hey Mike your tutorials have been very helpful to me especially this one. If you have time can you make a video about converting more complex er diagrams to schema. Like with n-nary relationships and multivalue attributes and such that would be so great because your reasoning is very good and you explain very well.

Hi Mike, really you are an excellent teacher, and perfect coder, your way is direct and extremely simple. if you please can you make a new series focused on practical and real projects. Many thanks . Ahmed

thank you so much bro i was scratching my head before on this topic now it's clear thanks again

Love the Office Database 😂😂

i have finished my homework because of this video after trying to find many videos Thank you so much. Better than my professor at uni who just read slides

Thanks man You made my Database class simple

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Let me say Thank You for making life life getting easier !

Thank you soo much !! Super helpful

Thanks for helping me pass my database course

Thank mike you've been very helpful

Great video! 👍🏼👍🏼👍🏼

You're so cool Mike!

Thank you! Very helpful!

Thanks so much for the help! :D

Really help me to complete my assignment. Great explanation

Good work. Very helpful

Amazing tutorial

excellent teacher !!!

great explanation thanks Ziraff academy

This was great lesson. Thanks a lot.

Thank you very much for explaining clearly

Nicely understand !!

That was great!

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Yaw Mike am fan of you, watching from Maryland

You're a great teacher, I really want to spend more of my time by watch and code along with your videos. Anyway, if you open a request, create Tableau tutorial would be amazing, I think. Okay that's all, keep it up the great work guys!

Awesome. Thanks a lot It really helped me

it's really a great explaination

Great video.

Great help ✌️

How much i hate this subject :D Anyways thanks for the video. It was much easier than reading 120 slides

superb!! thanks

Thanks for the video, I just use it to take my examination it is really really helpful.

LIFE SAVER TY TY TY

really helpful thank you

you are amazing

Hey Mike, thanks a lot for this. I also learned C from your channel. I wanted to know that what do I do now after finishing this course?

each video in this serie but esspecially the last three videos are the best i ve ever seen regarding ER Modeling in RU-vid. can you recommend a intermediary - advanced book or resource for ER Modeling & DB Design? Thx indeed..

Thank u so much! can you make more advanced paid courses in SQL, Back end Developer with economical for students. you teach so well.

Excellent. Clearly understand what are you say. Please add ISA hyrachy mapping

Thanks a lot!

This is gold

Hi Mike, Thanks for the great video which clearly explains the relationships and the keys. I would like to know more about the foreign keys in case of ternary relationships ? Do you have any write-up or video on this ?

Hi Mike, I watched your 4 hour long vides over the weekend - they are so helpful and easily to follow. Thank you very much. As an frequent Excel user, do you have a video on, or know where I can find good information on, the Excel-like calculations? For example, what should if I want to add a column to an existing table, and populate the column use the product of Existing_Column_1 and Existing_Column_2. Thank you in advance.

Subd straight away

Nice Sir Thanks Sir.

In 3 videos i learned more than an entire semester….

thank you!

6:30 there are actually two m:n relations

6:30 This is wrong. We have two if you look closely, there is also an M:N relationship between Branch and Branch Supplier

What about in the case that I have multiple partial keys in my weak entity? For example, my ER Diagram has the weak entity "Section", it has 3 partial keys, "Semester" "Year" and "Section #". The owner of this weak entity has the primary key as "Course #" The relationship between them is "HAS" and it's a many-to-many relationship. What would I put as my keys for this "HAS" table? Would it be Course# and all the other partial keys from "Section"? Or just Course# and Section#? Sorry if this is confusing but I'm super lost here. Thank you in advance!

Thanks man

As a beginner, I can imagine that I can even set everything on one table... if you don't worry about how messy it is, the reason it separtes to different small talbles, coz it would be easier to read

Thanks!

Hi, if you have a 1:N relation should an attribute on that relation eg. price be included in the relation schema? And where if it should?

What if we have a relation 1:N with r Total participation on the 1 side

Hey mike you are awesome,just you didn't mention multivalued attribute.

can you tell me what happen to age from Employee table and # of employees from Branch table. Those are derived attribute right?

can you explain about the BCNF(Boyce-codd Nornal Form)?

thank u

Hi Mike can you explain derived attribute in this example

Thanks

Good video but it'd be nice if you explained WHY we should always put the one table's PK as a FK in the many table

What do you use to build database and table

does anyone know how he drew the relational model? I mean the software used ???

What is if we have a terner relationship & not Binary? How to represent that?

tytytytytytytytytyty so much for real i had a problem with converting

Question: Why didn't you make "Supplies" another table as it has a m:n relationship between Branch and Branch Supplier? Because you said if it's m:n relationship we gotta make a new table. Or is it because of it's weak entity type? I would appreciate any clarification. BTW amazing explanation. Awesome work!