‫Hello.
‫Hey, guys.
‫It's been a while since we did a course update, actually, I mean, the last one I did, I think on
‫it wasn't April 2021.
‫The host, like I don't yeah, that was like, what, eight months ago?
‫Lots have change and the introduction to database engineering, and the first thing that changed actually
‫was the title of the course.
‫There was some misconception that this court is actually an introduction, which is maybe it started
‫this way, but it no longer is is no longer.
‫The word introduction kind of gave the idea that this was this course was, you know, for beginners,
‫which really isn't if you don't know anything about database engineering.
‫This course is really not for you.
‫You should really take beginning, of course.
‫Understand how to write a sequel, how to connect to a database, how to use a model, your basic database.
‫This court actually teaches you the fundamentals of database engineering, which is which is little
‫bit doesn't mean it's an introductory course.
‫Does that make sense?
‫Because when you actually go into the work, you know environment and you work with databases, most
‫of the time you don't understand how databases work.
‫You just, Hey, I actually do a sequel and gave me the result.
‫But you don't know how it works, right?
‫You might think you do, but you really don't know, especially when you're when you're really young
‫and you don't know really how things work behind the scenes that after the fact that you actually know
‫how to talk to our database, how to, you know, build a simple table, you know, build a simple app
‫and talk to our database, retrieve some result display.
‫And then I think this course is for you, at least know the basics and the basics of programming with
‫databases.
‫Then this course becomes for you because now, now, then it becomes this pivot that teaches you how
‫to appreciate how databases work, how they actually work in under the hood.
‫And when you do that, you will look at your code completely differently.
‫You know, any query that you write, you're going to ask questions you are never thought of asking
‫before, because now you understand how things work, right?
‫So that that was that was the first thing that changed in this course, fundamentals of database engineering.
‫And now we're reaching 40000 students.
‫Thank you so much for the support.
‫Glad most of you like this course.
‫All right.
‫And I understand it's not for everyone, obviously, but for those who are actually gets benefit of
‫it.
‫I'm really happy that the scores actually as beneficial for you.
‫So the ones you understand these fundamentals, you can see the different sections that kind of cement
‫this idea that OK, or there is one layer that I need to peel and there's one other layer I need to
‫peel.
‫So you start with the database internals and or some of the pages.
‫And just now, what I wrote is understand what a document is.
‫Yeah, I don't talk as much about NoSQL databases, but by the end of the course, you will actually
‫you will actually know how databases work because.
‫Nothing is magic.
‫No sequel is just a name, right?
‫That represents certain workloads of a database, so the fundamentals didn't change.
‫We still need to store data when we still need to plan how to retrieve the data.
‫We still need to understand how to store it and how to retrieve it in an efficient manner.
‫Graph databases, NoSQL databases, Russian databases.
‫It's all the end of the day is just implementation details, and that's what the course teaches you
‫here.
‫So, yeah, that's the first thing.
‫The second thing is really, I thought it was very important to add a new section that's called understanding
‫that database internals, because I made a lot of assumptions that most students didn't know, like
‫what is a page and how does a role stored in a page and how does a disk i o actually fetches that page
‫from disk and how or how, what things are stored on disk?
‫These are a lot of assumptions that I made previously that I thought people will understand, but it
‫was wrong for me to basically make those assumptions.
‫So I made a new sections that I just kind of added at the beginning of very, very beginning, right
‫after the acid section.
‫And this is like the understanding that database and journals.
‫And I think really, you should watch those before going into the sharding and partitioning MBIE trees
‫and B plus trees and then the homomorphic encryption databases and, you know, indexing and kind of
‫indexes as I compose it all their stuff, you need to understand how things actually work and that and
‫you're going to have a lot of questions which take us to the next point.
‫Next update of the course, you guys ask fantastic questions.
‫Most of the students that is in their course, you know, watch things, but they don't take it for
‫granted.
‫They say they have more questions.
‫And this is the, you know, the learning cycle.
‫When you have questions, 99 percent of the time, other people will have the same question.
‫So you you're right.
‫You're right, your question.
‫And I basically answer ninety nine point ninety nine percent of the questions all all the time, right
‫in this course, right?
‫And as a result, I find what I found some repetitive questions which are not wrong.
‫That's fine.
‫A repetition is good.
‫All right.
‫But then I had an idea to create a new section to, uh, actually answer those questions in a video
‫form, in a lecture form.
‫And you guys loved it.
‫So we did three so far.
‫I did one for the month of October, our monthly monthly kind of lecture month of October 2021, November
‫and December 2021, where I pick the most, you know, and interesting questions, and I answer them
‫in length in a lecture form.
‫And you guys loved them, and I noticed that you're now asking questions on the Q&A section, which
‫is amazing.
‫Obviously, I'm going to continue doing that as well.
‫And yeah, and the last thing I did is I found that some, some of you and I also noticed myself that
‫the quality of the audio and some of my older lectures was not on par of the newest ones, like the
‫acid, specifically the acid ones.
‫And so I updated those lectures, right?
‫The acid, all the acid and then a tomasetti consistency, isolation and durability.
‫I have recorded them around maybe two years ago, so I updated them.
‫So better audio quality and dark theme because most of you guys are night owls that actually try to
‫learn at night.
‫So you need something that is like easy on the eye.
‫So I tried updating all everything into new PowerPoints.
‫You know, all that jazz, the latest and greatest, and I'll record really.
‫It's a completely new recording, so it's not scrapped.
‫I never do discussed right to anything, right?
‫So it's it's a new recording.
‫So you have a brand new content, it's a brand new content, right?
‫And as myself, I learn new things.
‫I add this new content to this acid section and that honesty, consistency and isolation and anything
‫that I refresh the course that I refresh that lectures.
‫They are fresh you.
‫You get new content with that, which is amazing, obviously.
‫And now you might say Hussein, but I really you might have said something in the past that I really
‫need no problem.
‫I kept an archive section with all the old lectures, so you don't lose anything.
‫Yeah, you still have the old archived lecture.
‫You can go back to those because maybe I said something in that that is not the new lecture.
‫I doubt it, but some people.
‫Might have might want to prefer to watch the old lectures for some reason or another.
‫But yeah, guys, I just wanted to make a video to kind of celebrate you guys.
‫Thank you so much for your support.
‫Thank you so much for taking this course.
‫This cause has really become really, really popular.
‫I didn't really expect it, but I'm really glad that you're loving this course.
‫Keep up the great questions and all the best in your endeavors and your careers, obviously, and happy
‫holidays if you celebrate the holidays.
‫We're going to enter 2020 too soon.
‫That will be the essentially this the second anniversary of those scores.
‫I think I built this course in early 2020.
‫If I'm not mistaken and man, it is completely different than I than when I started it.
‫So I appreciate you all, guys.
‫Thank you so much.
‫I'm going to see you in the next one.
‫Enjoy the course.