Advanced SQL Tutorial | Subqueries

Take my Full MySQL Course Here: bit.ly/3tqOipr
In today's Advanced SQL lesson we walk through how to use Subqueries.
Link to Code: github.com/AlexTheAnalyst/SQL...
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Пікірлер: 215

  • @adityapandey6969
    @adityapandey696911 ай бұрын

    The entire, Beginner, Intermediate, and Advanced playlists are a gold mine, Alex! Thank You!!!

  • @AlexTheAnalyst

    @AlexTheAnalyst

    11 ай бұрын

    Glad you like them!

  • @_stalKer___

    @_stalKer___

    5 ай бұрын

    where is advance sql playlist

  • @usuallyclueless4477
    @usuallyclueless44773 жыл бұрын

    I have a Coursera certificate in MySQL, but you've explained it so much better than the instructor of that course.

  • @ericfiumano4694

    @ericfiumano4694

    2 жыл бұрын

    I cannot speak for MySQL course cause I haven't attended it but, having attended other technical Coursera (and Google, too) Courses I fet a little bit disappointed regarding the content. Definitively, too much bla bla bla and little practical approach.

  • @wasitthat

    @wasitthat

    2 жыл бұрын

    I'm taking that course right now. Have to heavily supplement it with the mode tutorial because the actual course lacks soooo much detail and examples!

  • @tasadem20

    @tasadem20

    2 жыл бұрын

    Same. Taking a 4 week class from Coursera and i was stuck on week 3 where the instuctor teaches subquiries and joins. Hope this video will help

  • @ninas.2724

    @ninas.2724

    2 жыл бұрын

    @@tasadem20 I’m having the same problem in week 3, I couldn’t understand the instructor and she didn’t not explain correctly

  • @HortenseEagle

    @HortenseEagle

    Жыл бұрын

    I have the same issue on datacamp, before I realised I was already doing nested subqueries and CTEs 💀

  • @loose.electricity
    @loose.electricity Жыл бұрын

    Just finished this series, thank you so much, you've re-ignited my passion for learning again. These simple, clear explanations of concepts has given me the confidence to dive back into more advanced concepts again.

  • @damasusaditama2148
    @damasusaditama21482 жыл бұрын

    All your SQL tutorial videos from the basic up to this have helped me understand SQL, MUCH BETTER compared to the explanation that I've got from a bootcamp. Your explanation is so complete and concise. Thank you so much, Alex!

  • @AlexTheAnalyst

    @AlexTheAnalyst

    2 жыл бұрын

    Really glad to hear it! :D

  • @alexter001122

    @alexter001122

    11 ай бұрын

    Question: were you able to land an analyst job after finishing your bootcamp?

  • @damasusaditama2148

    @damasusaditama2148

    11 ай бұрын

    @@alexter001122 yes. I finished my bootcamp in Sep-2021, then applied for a data analyst position at various startups, did some interviews, and started working as a data analyst in Feb-2022.

  • @flyeagle320
    @flyeagle320 Жыл бұрын

    I Am glad I followed the whole series of SQL tutorials from easy to advanced. Now I am clear on the concept. Now I am going to follow a real-world project of yours.

  • @marcellaperkes4870
    @marcellaperkes48702 жыл бұрын

    Thank you Alex! 🙌 For the last year I’ve been learning about data analysis/computer science part time, with the goal to move into the tech industry so that I can WFH, be available to my kids, and have income growth potential. Your videos were fundamental to my learning. I just landed my first job in the industry, and I attribute a big part of that to you.

  • @IceTobSmoKeo

    @IceTobSmoKeo

    Жыл бұрын

    How was your journey now? Mind sharing us your experience?

  • @davidcorona644
    @davidcorona64410 ай бұрын

    Holy mackerel! We think and code exactly the same.This is exactly how I teach people about sub-queries, and partition by, and even the rarely used 'right join' which is similar to 'not in' where clause sub-query.

  • @melissaleigh3013
    @melissaleigh3013 Жыл бұрын

    King, you are the best sql teacher on youtube. Thanks SO much for making content on sql concepts that are actually used in everyday work flows.

  • @charlesrobertson1860
    @charlesrobertson1860 Жыл бұрын

    Thanks so much for these tutorials! I had a basic understanding of queries in ArcMap for GIS data and didn't understand why it was really that important but now thinking of it as having a database that has pre-made queries that can be manipulated in different ways to process and analyze data has made me understand its importance!

  • @ThiagoSimoes79
    @ThiagoSimoes799 ай бұрын

    I thought I knew SQL, but this whole series of videos help me understand that I don't know anything. Although your explanation was ease to follow and understand, I feel that need more study to really understand all the concepts.Thanks a lot for your time to make this series.

  • @AlijandroI
    @AlijandroI Жыл бұрын

    Had troubles understanding some concepts from a bootcamp but your explanations are amazing! Concise, precise and easy to understand.Thank you!

  • @ColonelHathi
    @ColonelHathi5 ай бұрын

    I just finished the Beginner, Intermediate, and Advanced SQL videos. Thank you, Alex, for publishing these. I'm adding SQL to my tool belt. These were a fantastic first look at the language.

  • @ninahbae2922
    @ninahbae2922 Жыл бұрын

    Today i have completed SQL😩😩🥰❤️ Am so grateful for having found your channel, i believe by 2024 i will land a data analyst role in government or health care all studying from this bootcamp from scratch🙏🙏🙏 never been as committed, thank you so much once again, tomorrow am starting off with Python

  • @ngunyi101

    @ngunyi101

    Жыл бұрын

    wish you all the best in your journey. consistency is key 💪

  • @mizerosamuel5613

    @mizerosamuel5613

    3 ай бұрын

    How is it now????

  • @jjsinclair94
    @jjsinclair943 жыл бұрын

    This has come just in time for an interview I have in the morning for a modelling analyst position, can't begin to describe how much your videos have helped! Keep up the crazy good work you are doing here!

  • @nnaemekaonwuka7474

    @nnaemekaonwuka7474

    3 жыл бұрын

    best of luck and i hope you celebrate with us when you get it. cheers

  • @rosslobo2692

    @rosslobo2692

    2 жыл бұрын

    did you get that job ?

  • @yanirhaim7787
    @yanirhaim77872 жыл бұрын

    Thanks for the great tutorial! Currently on my Google Data Analytics Certificate! This video made it easier to understand the concept!

  • @stultuses
    @stultuses Жыл бұрын

    Excellent, someone who knows how to zoom in for those watching on mobile!!!!

  • @AnglBunny
    @AnglBunny Жыл бұрын

    Thank you so much for posting this series. I am learning SQL for the first time and your videos are extremely helpful :)

  • @matheuspegorari1094
    @matheuspegorari10943 жыл бұрын

    I love your videos, content is never enough. I know sometimes may be obvious to talk about something like subqueries when we have lots of content in the internet, but your explanation is very pertinent and very didatic, i learned a lot today. For this I thank you.

  • @AlexTheAnalyst

    @AlexTheAnalyst

    3 жыл бұрын

    So glad to hear that! And I agree - sometimes one good explanation of something is all you need to really get the grasp of it

  • @esthernwaogu592

    @esthernwaogu592

    Жыл бұрын

    Hello matheus please can we chat on telegram I need assistance

  • @ekinci_io
    @ekinci_io3 ай бұрын

    As someone who received SQL training during master's degree, I have to say that I learned much more from Alex's SQL lessons than what I learned at school. You are amazing Alex!

  • @ImEli2215
    @ImEli2215 Жыл бұрын

    After roaming around with other tutorials, it makes your tutorial more valued. Thanks sir

  • @tomilolaomowumi7156
    @tomilolaomowumi7156 Жыл бұрын

    You posted a tutorial on CTE before this. I am following from the older videos to the newer ones so I got lost for a bit and had to come find this. Thank you for making learning easy

  • @salikmalik7631
    @salikmalik76313 жыл бұрын

    Your videos are good Alex. We need a playlist of SQL needed for data science. Its a request. :)

  • @linavilaa
    @linavilaa2 жыл бұрын

    I learned so much with your videos. You made learning SQL very fun. I enjoyed your examples. Thank you!

  • @halildurmaz7827
    @halildurmaz7827 Жыл бұрын

    Perfectly clear explanation. However, I also noticed wrong information: 7:17 You said, "In your Subquery, you can only have 1 column selected". However, you can select multiple columns by using parentheses --------> WHERE (a, b) IN (SELECT a, b FROM x)

  • @yingdeng1106
    @yingdeng1106 Жыл бұрын

    Thank you so much Alex! I went through the basic, intermediate and advanced SQL Tutorials. I would love to learn more about the store procedures in detail!

  • @AlexTheAnalyst

    @AlexTheAnalyst

    Жыл бұрын

    You're most welcome! Thanks for learning with me :)

  • @ezhankhan1035
    @ezhankhan10355 ай бұрын

    Brilliant SQL Tutorial Series! Every Video has really helped to fill in any potential gaps in my knowledge and even reinforce my existing skills. Thanks Alex!

  • @icantw8
    @icantw82 жыл бұрын

    This is tremendously helpful. Got to resolve a blocker because of you. Thanks!

  • @ivorkoruznjakk1579
    @ivorkoruznjakk1579 Жыл бұрын

    Im taking a test today and this is the perfect video for a quick reminder of everything.

  • @gianniprocida3332
    @gianniprocida3332 Жыл бұрын

    Very helpful. All your videos about SQL are very easy to grasp and concise. Thank you so much.

  • @richardogden1466
    @richardogden1466 Жыл бұрын

    Thank you for your work and detailed explanations Alex. I mainly use COGNOS and COGNOS SQL so this is a great crash course for me to learn the differences between the two.

  • @syaoransakura8839
    @syaoransakura88392 жыл бұрын

    Finally finish this advanced tutorial. Keep going for next series...

  • @louisizuchi1626
    @louisizuchi1626 Жыл бұрын

    Thank you Alex, i really learnt a lot from the beginners series up this advance series

  • @akj3388
    @akj33882 жыл бұрын

    Thanks for letting us know that for a subquery in the SELECT and WHERE clauses; it can only have a single value and single column respectively as an output.

  • @lefamokgatle2489
    @lefamokgatle2489 Жыл бұрын

    Thank you so much. I had trouble understanding sub-queries. You've explained it so well. 😎

  • @user-fr9gv8vk9t
    @user-fr9gv8vk9t Жыл бұрын

    Thanks Alex for teaching Advance SQL REALLY QUICK.

  • @JohnRussell9
    @JohnRussell9 Жыл бұрын

    Thanks for giving such a clear and concise explanation for why one would use subqueries! I'm currently working through the Google Data Analyst certification program and your explanation and approach was much easier to understand than the instructor who presented on this very topic.

  • @thesamshekhawat9500
    @thesamshekhawat9500 Жыл бұрын

    Thank you so much Alex for providing such a valuable skills for free. It really made me become a aspiring data analyst.

  • @Alexdasilva872
    @Alexdasilva87211 ай бұрын

    I've just finished this series (1 week). I'm going to rewatch it all again (hopefully 1 day) and then start the Portfolio Project. I started from 0 and your videos are purely useful content, it made me understand SQL really fast. Thanks from Spain. PD: I will communicate here when I finish the course completly and also if I am lucky enough to get a job.

  • @srijanrawat4014

    @srijanrawat4014

    10 ай бұрын

    do tell

  • @mizerosamuel5613

    @mizerosamuel5613

    3 ай бұрын

    How is it now?

  • @Alexdasilva872

    @Alexdasilva872

    3 ай бұрын

    @@mizerosamuel5613 I got a job. :) This really helped me!

  • @Alexdasilva872

    @Alexdasilva872

    3 ай бұрын

    @@mizerosamuel5613i got one bro

  • @bryanpaulcardinoza7693
    @bryanpaulcardinoza7693 Жыл бұрын

    Just finished watching all sql tutorial videos in this bootcamp. Time to watch the portfolio project.

  • @1689JeffChavez
    @1689JeffChavez11 ай бұрын

    On my journey through the boot camp... This comes in handy. Thank you.

  • @itsReshad
    @itsReshad2 жыл бұрын

    Keep up the Amazing content Alex!

  • @StephanieBassil
    @StephanieBassil2 жыл бұрын

    Thank you Alex for ur way in simplifying the training! Are you giving later more advanced videos about SQL or that is all ?

  • @sols9019
    @sols90193 ай бұрын

    Done for SQL Tutorial after 3 weeks of learning and spending 2-3 hours in each session while creating different scenarios outside the samples. hehe Mygee! I made it! haha! Thank you Alex! Next step is to get a certificate of SQL before proceeding to the other Tools. Hopefully I'm doing it right. Lol

  • @momohtimothy6898
    @momohtimothy68983 ай бұрын

    I am Finally done with SQL on this amazing channel. But got to go back for some revisions.

  • @salehgamal1511
    @salehgamal15112 жыл бұрын

    I have taken udacity course on sql and i applied the course on an actual db but your tutorials are much better realy specially on the joins

  • @cmhanft
    @cmhanft2 жыл бұрын

    God bless you, Mr. SQL.

  • @michaeloyetunde8974
    @michaeloyetunde89749 ай бұрын

    Thank you so much, Alex. Your videos are superb.

  • @itikalaneelu9126
    @itikalaneelu9126 Жыл бұрын

    keep up the good work sir. I have been following your videos and techtfq videos as well and learned so much

  • @JustinLietz
    @JustinLietzАй бұрын

    Thank you for sharing, really really appreciate this. I would love to see more advanced stuff, specifically examples where you're using synonyms across different servers within source stored procedures (used to populate stage tables) to make joins along with ctes. I am at an internship right now, and still in my first year of college, I feel completely lost when working in these health insurance databases, most videos on youtube don't really go into more complicated stuff that I work with everyday so thank you again Many of these queries in the code base are 3000+ lines long and my brain goes numb looking at all the subqueries, joins, and obscure functions I have no idea what they do

  • @marius9897
    @marius9897 Жыл бұрын

    Hi Alex. Thank you very much for this series of videos. For me, your method of teaching is easy to follow and understand. Are perhaps you going to produce a tutorial on Goolge's Looker too in the near future?

  • @anthonynkem
    @anthonynkem Жыл бұрын

    Thanks Alex. Great course

  • @mfundohg958
    @mfundohg958 Жыл бұрын

    Thank you this series is really helpful. 👌

  • @jayashukla4799
    @jayashukla47992 жыл бұрын

    WOAHH!!!😍😍 Thank you so much for making it easy :)

  • @shappirefishing1186
    @shappirefishing11868 ай бұрын

    Excellent Tutorial

  • @pramudyadika_
    @pramudyadika_ Жыл бұрын

    thank you Alex!

  • @romanvasiura6705
    @romanvasiura6705 Жыл бұрын

    Thank you for this video and recommendation

  • @user-ok9vq1rh6h
    @user-ok9vq1rh6h9 ай бұрын

    Hey Alex! All your videos on Sql Tutorials are awesome! Can you make a video on how to use primary and foreign keys in Sql Server? You've mentioned in one of your videos that you'll be covering those topics but I haven't come across the PK and FK in the Sql Tutorials(maybe I've missed them). Or if you have a video already out, could you direct me to it? Thanks for all the videos, they've helped me understand SQL Server much better!

  • @fantasytrain42
    @fantasytrain428 ай бұрын

    I have enjoyed your videos. I have been programming and working as a dba for a long time, 28 years - since sql server 4.2. (Do you remember *=). I would consider myself an expert in sql server. I was even able to pick up a couple things in your sql videos that I didn’t know or at least did 8n a different way. Great job. Looking forward to the python and newer content. Working towards learning how to use ML to help clean data and find errors over the next year.

  • @syedalinemath917
    @syedalinemath9179 ай бұрын

    Thanks it was helpful!

  • @MrXRes
    @MrXRes Жыл бұрын

    You just basically saved my career now

  • @DeepakBhargav-or8rs
    @DeepakBhargav-or8rsАй бұрын

    thank you so much for this tutorial

  • @stylewithsmriti
    @stylewithsmriti2 жыл бұрын

    Please make a video on Window Functions. I love your videos :)

  • @Charlay_Charlay
    @Charlay_Charlay10 ай бұрын

    Thanks Alex!

  • @queensam6868
    @queensam6868 Жыл бұрын

    Great content

  • @tausifahmed4760
    @tausifahmed47603 жыл бұрын

    Hey Alex thanks for making videos which are so informative and helpful..as a mechanical engineer who wants to change his profession to data analyst ..what will u suggest to learn first

  • @AZZOUZE1
    @AZZOUZE111 ай бұрын

    Great content Thanks

  • @jonathanbrotto7278
    @jonathanbrotto72782 жыл бұрын

    I wish I had this during my undergrad over a decade ago.

  • @smgt90
    @smgt902 жыл бұрын

    Thanks, very helpful

  • @iskate248
    @iskate2482 жыл бұрын

    Sounds like Dane Cook is teaching me SQL. Good video, thank you.

  • @dawitworku821
    @dawitworku8212 ай бұрын

    Very helpful. Than you.

  • @A7mouzi
    @A7mouzi4 күн бұрын

    do you have any suggestions on where I could practice these functions more? and this playlist is really beneficial thanks for the time and effort!

  • @Joi_SS
    @Joi_SS3 жыл бұрын

    I just learned this recently! Wonder do you have any recommendation for an intermediate level courses after the beginner course? I'm 75% done with my SQL beginner course. Thanks! :)

  • @pipertripp
    @pipertripp5 ай бұрын

    This looks like a really interesting subject. I didn’t know anything about it until now, but I suspect the exponential, geometric, and weibull distributions might factor in?

  • @kristinaannabel7113
    @kristinaannabel71138 ай бұрын

    that was really quick

  • @Anipro88
    @Anipro882 жыл бұрын

    Very helpful, thank you. Is there a way to find out the input parameters of a stored procedure, that someone else may have created, w/o using the "modify" option?

  • @esthernwaogu592
    @esthernwaogu592 Жыл бұрын

    Hello Alex I love ur videos they v been guiding me through data analysis but i v issues with my sql

  • @SeanBaker
    @SeanBaker3 жыл бұрын

    I’ve been using SQL on my job since 2007, and I swear that I still don’t know everything I should know when it comes to really "complicated" queries.

  • @AlexTheAnalyst

    @AlexTheAnalyst

    3 жыл бұрын

    Same lol

  • @lorajohnson4115

    @lorajohnson4115

    3 жыл бұрын

    Me too.

  • @YoYo-gf9wb
    @YoYo-gf9wb2 жыл бұрын

    You should remind ppl to like your videos. I really like all your videos, super helpful~~~ but always forget to like it....

  • @user-eu5rz4nv3y
    @user-eu5rz4nv3y Жыл бұрын

    hello Alex and thanks for greate videos. What "over ()" means? thanks

  • @janetbartonjo8916
    @janetbartonjo89162 жыл бұрын

    Hey,i love your videos! I have a question though. In your last example you can simply do the normal query and filter using "WHERE Age>30" and still get the same results, right? If yes,then why do we need to use WHERE sub query?

  • @66abady
    @66abady2 жыл бұрын

    thanks a lot mate

  • @jpzhang8290
    @jpzhang8290 Жыл бұрын

    Subquery can also alternatively be replaced by temp table or CTE.

  • @RodStremel
    @RodStremel3 жыл бұрын

    Your content is awesome, Alex! Thanks for all the videos! I don't know if you've answered this before, but I need to ask: how can I show my SQL skills in a portfolio project? Showing Python code with all the EDA and data viz is ok, I can do it, but I always have a hard time figuring out how to show employers that I know SQL (it seems like all they care about is if I've used in a job situation, which I haven't had the chance to). Any tips on that? Thanks again!

  • @Magmatic91

    @Magmatic91

    3 жыл бұрын

    It's a good question. I'm kind of in the same situation than you. Personally, what I'm trying to do is simply looking for datasets online then trying to make my own project. You can for example find free datasets in SQL server website or Kaggle but I agree with you that it's not that simple. Hopefully Alex will answer this comment.

  • @BestInTheWorld215
    @BestInTheWorld2152 жыл бұрын

    I'd love a tutorial for working with SSIS Packages

  • @claraoliva254
    @claraoliva2546 ай бұрын

    Just to clarify, only the where statement combined with the subquery can only have 1 column selected? SELECT and FROM can select all columns if wanted from a subquery? thanks!

  • @massimoriggio6297
    @massimoriggio62972 жыл бұрын

    Hello Alex, why did you create the subquery when to get the average you could have just specified : "SELECT EmployeeID, Salary, (AVG)salary FROM EmployeeSalary"? I am really confused and would be glad if you could help.

  • @rickydethan7037
    @rickydethan70379 ай бұрын

    I just finished the SQL tutorial from beginner to advanced. Now I want to start the portofolio project but part 2 & 4 of that video are missing. Let me know when those video already uploaded. thank you very much and sorry if there's something wrong about this comment, I'm still learning English

  • @asfak54321
    @asfak543212 жыл бұрын

    Thanks

  • @ajaysurya9075
    @ajaysurya9075 Жыл бұрын

    I wanna ask a question, that can we build charts and graphs in mysql for reporting?

  • @ves5657
    @ves5657 Жыл бұрын

    What happens if you remove "over ()" from the "with Partition By" example?

  • @slimisslow244
    @slimisslow2442 жыл бұрын

    Hi there! great content!! Just to know, in a working place, how often is a subquery used compared to the join function? As both can give the same result.

  • @AlexTheAnalyst

    @AlexTheAnalyst

    2 жыл бұрын

    Joins are used all the time - subqueries about 10% as many times as joins

  • @lucatintor4896
    @lucatintor4896 Жыл бұрын

    Hello teacher where can I load those data to practice following your explanations? Thank you

  • @shadowrealm8937
    @shadowrealm89376 күн бұрын

    what is the tool you using?

  • @shrek3706
    @shrek37062 жыл бұрын

    Suppose we have two tables, can we select from one table in a subquery and then select from another table for the rest of the query ?

  • @ChilledSquirrelyt
    @ChilledSquirrelyt7 ай бұрын

    Where is primary and foreign key video could you please share the link

  • @marklabaclado2176
    @marklabaclado2176 Жыл бұрын

    What program is used here? It looks like a Jupyter NB for SQL

  • @nishantm1924
    @nishantm19242 жыл бұрын

    how can you import csv file to an already existing table using sql query? like suppose you have Customer table and now you want to add data from xyz.csv file and both Customer and csv file have same attribute ,then how to do such task?

  • @kelthekonqrr
    @kelthekonqrr Жыл бұрын

    SubQueries, I keep coming back here

  • @davekoot7880
    @davekoot7880 Жыл бұрын

    Thanks for the video! Studying SQL with DataCamp but the explanation on subqueries is very short..

  • 10 ай бұрын

    Hi Alex! I'm following you in LinkedIn. Pls, keep me post it about the data analyst bootcamp you plan to launch. I, myself I am changing career. I want to be more technical marketer with strong focus on web analytics and touching here and there analytics subjects....