It's been 7 years and still, this tutorial series is far better than every other material on SQL :) Hands Down, Thanks a lot!

give this guy a medal

Best tutorial available on the net . Thank you for your hard job . You are the best teacher on the planet. The way of teaching is just superb! Greetings from Poland !

After 20 years as software developer, it's the fist time that I pay attention to the adventage of window function, I'v been using the subqueries to get this kind of results, but with a very low performance in execution time.

This is gold! I have been struggling to understand Window functions and syntax and your explanation makes it all clear now.

Hello Venkat gaaru, great work . Just to add on for the default value of ROWS or RANGE values in OVER() Clause, which varies based on ORDER BY clause --The default value of ROWS or RANGE clause is "RANGE BETWEEN UNBOUNDED PRECEEDING AND CURRENT ROW" If the ORDER BY clause is specified --The default value of ROWS or RANGE clause is "ROWS BETWEEN UNBOUNDED PRECEEDING AND UNBOUNDED FOLLOWING" If the ORDER BY clause is not specified i.e the entire window. Please correct me, if anything is wrong. Kudos to your work and Thank you🙏.

You're a natural born teacher. You're doing what you were born to do. Keep up the good work!

This is the best tutorial on windows functions on youtube. Thank you so much for this.

if you use just this: AVG(Salary) OVER() - then whole set is used for computing average. But as soon you put order by into OVER, default value for ROWS and RANGE are taken into calculation. I would expect that just using ORDER BY should not affect calculation of AVG, but it does - it completely changes result set on which calculation is made.

I don't know what to say to you. Thank you very much. You saved me a lot of time and I'm in the middle of exams, usually I would've spent a lot of time searching for an even 50% good tutorial, but your videos are 100% good and precise. Keep up the great work. I hope you do more topics.

What an amazing teacher! Thank you so much for breaking down these concepts for us! :)

Great video! Thanks a lot! One thing I would add is that instead of writing BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING statement, we could remove the ORDER BY entirely and just write: AVG(SALARY) OVER() as Average

Freely available at this quality is incredible...god bless!

Amazing explanation. Thank you!

Can't believe this doesn't have more views!

I was struggling to understand windows functions and you have explained it with so ease .Its just awesome.Please keep posting such videos.Thanks a lot :)

This video is exceptional, searched whole of the youtube and internet but no one explained so easily and clearly

Your tutorials never disappoint! Thanks for sharing your knowledge!

this guy is so good at teaching.

thanks for all the parts in sql, i have no hope of learning before seeing your videos ,slowly learnt total course because of u , god may bless you with happy family

very very good and clear teaching.

The best video on Window functions so far! highly recommend!!

Hats off bro...easy to follow and well explained!

This is a really comprehensive tutorial! Thank you so much!

Best Tutorial in KZfaq! I Love your detailed Videos! I hope you will start with Analysis (SSAS) one day! Thank you Venkat!

You are awssssssom, spent entire day yesterday. think will view kudvenkat tomorrow sunday. found solution withing 5 minute. GREAT

Good attention to detail Thanks a lot

Words cannot translate the emotions . Only can say excellent presentation in clearing the concepts. Thank you from core of heart.

You are a gem! Explained and demonstrated so well. Thank you very much good Sir!!

One of the best explanation of the concept of Windows function! I have referenced to lots of tutorials online, but this one really stands out to me :) Kudos gentleman!

this person is teaching better than paid courses...

Venkat are too good. Unbelievably clear and simple.

The best of the very best! Thank you very much. Greetings from Nigeria

really a very detailed explanation.

Great sir This video helps me lot thank u so much 🙏🙏

Wow this is my first comment I’ve ever left on KZfaq, you are an amazing teacher I wish I could be mentored by you. From South Africa

Worth watching

Total hero.....I have 70-461 coming up and you've helped me no end!!!!!

Best video for understanding window functions.

you explained it so well, thankyooou

EXELENT !!!!! it is the best for 10 minutes !!! Perfect

Awesome explanation

WOW.....you are too good in explaining the things..cheers...

video was straight forward and detailed, thank you for sharing your knowledge

OMG Thanks for this absolutely amazing video

Great explanation 👍🏽

GREAT JOB!!!

Great explanation

Thanks! very helpful content

keep it up! extremely well made tutorial! :)

You are like a GOD for me....

Thank you Venkat Sir.

Thanks great video 👍🏽

I'm reading Itzik Ben-Gan Fundamentals and joes2pro books but your videos really do give the best clarification on SQL topics. Subscribed and be checking the rest of your channel

Very helpful video, clearly and nicely explained . Thanks !

you made it so clear and precise...thank you

very well explained with simplicity. Great Work.

Wow. Thanks brother ❤

Thanks a lot for the videos. They are very well explained.

Simplicity of your explanation is remarkable. Keep it up.

What an explanation! Thank you!

Great video! Thank you, it is much clearer now!

Very detailed video.... Thank you :)

very neat and to the point explanation !

Thank you so much! Best tutorial!

Great Video. Thank you for posting.

Thanks for the video. It was really helpful

Thank you so much and appreciate your work.

To the point, very nice explanations . Thank you :)

Thank you. That was extremely clear

super helpful

This is super helpful. Thanks!

Thank you Venkat

Can't thank you enough for these videos ! :)

Sir u r great

Great video, Many thanks

Amazing ! No words !!!

You are awesome!

Very good explanation

Thanks man, apreciate your work you've done here :) helpfull, keep doing good work :)

5 star teacher

Too good, thank you so much

Very informative

El Maestro returns

Excellent!!!

Отличное видео

great..

Hi Venkat, first off I enjoy your videos a lot, very helpful for interviews. I have a question related to analytic window function (sum) Could you please confirm which version of MS SQL Server are you using? Not 2008 right? Because, I tried running below query in 2008 version which is quite similar to what you demonstrated in of your slides in above video and it threw syntax error. select *, sum(sales) over(order by sales) as sumofsales from test1......error select *, sum(sales) over() as sumofsales from test1.......no error it ran successfully select *, sum(sales) over(partition by dealer) as sumofsales from test1.......no error it ran successfully The reason why the first query failed makes sense to me, because I believe there is no need at all for a order by argument in analytic window function; partition by argument might be required sometimes though (my 3rd query) I got confused because your query (quite similar to mine, as per above logic it should have failed since it contained order by arguement in analytical window function you demonstrated) ran successfully... Seems like you are using a different SQL version than mine...Just curious to know why your query did not fail :) Thanks again for comprehensive, well articulated and ofcourse free videos :) Regards, Romil

Thanks

venkat sir could u explain realtime queries in fucntions

Good tutorial. Partition by Gender order by Salary. Why salary is not in ascending order?

Running average by accident, I love it!

Thanks sir!!

Your voice sounds like Sadhguru

thanks so much

Is there anyway to set the preceeding/following row clause programatically so that i can write one function that can output moving average of variable window width? (without using dynamic queries)

Why can't we directly use partition by instead of specifying Unbounded values? In video 108 this is achieved by Partitioning it right?

i think we have to use ID column for Order By Clause to avoid duplicates.....

If we just use OVER() without specifying anything inside over then it is an equivalent to mentioning UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING.

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