Joins in MySQL | Intermediate MySQL

Full MySQL Course: www.analystbui...
In this lesson we are going to take a look at Joins in MySQL!
GitHub Code: github.com/Ale...
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All opinions or statements in this video are my own and do not reflect the opinion of the company I work for or have ever worked for

[@lifeasjt9584]

6 minutes in and I already understand more than an online course I’m enrolled in. Subscribed!!😊

[@johncyriligwe7538]

same here

[@duurduranto]

i looked at several videos regarding joins and believe me, your way of explaining the topic is the best.

[@dataandengineering]

The summary for the outer join is : ○ LEFT JOIN § You take everything from the left table , and the matches of the right table ○ RIGHT JOIN § You take everything from the right table and the matches of the left table

[@kcmauceri]

A gold mine of information. So happy I came across this boot camp.

[@MrKenneth009]

Ron Swanson redacting his birthday was a hilarious reference from the show hahaha

[@Mister_Garibaldi]

Poor Leslie Knope isn't getting a present this year! 🤣

[@AlexTheAnalyst]

:(

[@j__o__e__2739]

@@AlexTheAnalyst Why does craig show up in list 2, but not list 1? Is it because Ron isnt on list 1?

[@RMIVfitness]

What I wanna know is how Leslie is making more money even though Ron is her boss?

[@braydj]

@@RMIVfitness I make more than my bosses do. Though I am in a different industry.

[@mohannadhazem5117]

been struggling to fuly understand joins for weeks until i stumpled on this boot camp, but in this self join xample i don't think Leslie got herself a secret santa 😂

[@fredericnicholson80]

Hi Alex, thanks for these great introductions. You present great examples that show the essential concepts. There is one topic though that I believe deserves some attention: The differences between the different SQL dialects. For example, If I compare this video to your intermediate SQL video on "Join", then mySQL seems to be missing the "full outer join" option.

[@alkhemist6631]

Glad im in the intermediate now. I doubt I understood everything in Beginner. I will go back and come when I understand 90% of it.

[@NoluthandoMthethwa-ei9fp]

Thank you, this is so helpful I’m so happy I found this boot camp

[@palesampe]

Are you in the ALX programme?

[@Lifestudent-]

@@palesampeExplore AI program

[@momohtimothy6898]

Exactly the information i want, clear and simple...straight to the point.

[@BruceBeck-f1n]

Great lesson Alex. It's been quite some time since I practiced any sort of JOIN in any flavor of SQL. Great review! Thanks for your outstanding work. Cheers! 🤠

[@ShreyaSridharD]

As a huge fan of parks and rec i enjoy learning from these video : )

[@taiebxr]

thank you for this, loved the beginner series- concise amd clear!

[@nategraham3980]

this was posted on my birthday! thumbs up January babies!

[@MikeJones-ql3db]

Thanks a lot you make learning very easy

[@shobolabenjamin4454]

Thank you ALEX for all you do.

[@abrahammoruti5967]

As a recruiter yourself Alex what level of skill set are you looking for when you're trying to look for a entry level analyst?

[@AlexTheAnalyst]

A solid concept up to Intermediate.

[@HeinHtetAung-vh3uu]

Thank you so much, Alex. Awesome lesson

[@ar8abdul]

If you don't mind make videos about creating indexes, triggers, auto_increment in mysql

[@AlexTheAnalyst]

Some of those will be in the advanced series next :)

[@NohablaEspnaol]

Thank you so much!

[@mohdparvez9148]

One problem though, the first employee Leslie doesn't have a secret Santa. I guess no gift for her this Christmas ;)

[@Mr.Arshad-oc1fd]

On thing in my mind is that there is joining of two tables so the employee id column are showing double why should not there is only one employee id column

[@sunnysisodhya]

Hey I Was Looking For This Video Thanks

[@newenglandnomad9405]

What kind of answer would you get from joining 3 tables? What would you do with the answer?

[@Mr.Arshad-oc1fd]

Hi sir thanks for this great unforgettable teaching us

[@RogerAmanna]

At 10:40 the +1 is added to the left table. But, when we run the query, it looks like the right table was added with one. How exactly does this work?

[@RogerAmanna]

I found the answer to this. The join condition is emp1.employee_id + 1 = emp2.employee_id. This means that for every row in emp1, SQL will add 1 to the employee_id and then look for a match in emp2 where the employee_id equals this modified value.

[@DadaCreative.]

hello Sir Alex if I only write SELECT * FROM employee_demographics; its bring me Error have to write SELECT * FROM parks_and_recreation.employee_demographics; even if am inside demographics table.

[@cassandraneall5484]

He goes over this in the fourth video of this bootcamp (Select Statement in MySQL) but you may have the wrong schema selected in the navigator section on the side, if the parks_and_recreation isn't bolded then the data will not be automatically pulled from that data set. Hopefully this helps and I explained it in a way that makes sense, I'm still new myself so if it's not that then I don't know lol

[@sarkersaadahmed]

lets put it in a logic gate INNER JOIN: AND GATE, IF ONE OF THE ROWS DOESNT EXIST WHILE THE OTHER DOES, ENTIRE THING GONE!! FULL OUTER JOIN: EVERYTHING LEFT OUTER JOIN:" OR gate where everything on the left will output but everything on the right will show NULL and everything on the right will only be shown if there are datas that have the same value as the values of the left RIGHT OUTER JOIN: VISE VERSA FOR LEFT OUTER JOIN

[@kanchanachristopher5465]

Alex kindly make a playlist on azure.

[@sarkersaadahmed]

JOINS inner join ->inner join simply joins two database tables based on ->just like AND gate [ SELECT * FROM [chemical thermodynamic and polarizability table].[dbo].[Chemical] AS c INNER JOIN [SQL Tutorial].[dbo].[quantum_research_papers] AS q ON [SQL Tutorial].[dbo].[quantum_research_papers].categories = [chemical thermodynamic and polarizability table].[dbo].[Chemical].Energy; ] D1 denotes database 1 and D2 denotes database 2 will “merge” and excliude the databases that either of the tables do not have [simply the inner join] based on the common column name between the two databases tables Note: Its best to mention the [DATABASE_NAME].[dbo].[QUERY_NAME].column_name LEFT JOIN is like OR gate where everything on the left will output but everything on the right will show NULL and everything on the right will only be shown if there are datas that have the same value as the values of the left VISE VERSA FOR RIGHT JOIN FULL OUTER JOIN IS EVERYTHING LITERALLY

[@Rianne421]

Thanks this is great!

[@mercyokwoli6837]

Thanks Alex

[@faithgaming8770]

I've completed all ur videos of this course till yet but didn't understand anything in sql. What the use of these functions in sql?

[@varunchamoli9742]

Sir should I Start my career in data analytics with python or sql

[@ashutoshpandey9105]

Hey, please bring more project based videos.

[@AlexTheAnalyst]

I always do :)

[@lovamaxy3498]

Thanks for the lesson, I keep having error problem (1046), how do i resolved it. Thanks

[@ajithfrancis1992]

Sir in 16:49, the last query you wrote, you have added alias names for first two tables but you haven’t added alias name for parks_dept table; instead you wrote as pd. Why ??

[@janvi2294]

pd is alias for parks_dept table ..we can directly write it after table name or can use "AS pd"

[@MinatoJunior-hl8tb]

Hey can you make a video in how to download a program to practice data. Or is there a way for you to add it into your website for people to practice with data from outside like Jupyter but for sql

[@joshuafriday5357]

Nahh. I think Mark got one. No santa for Leslie 😅😂

[@sohaibamjad2878]

Could you please let us know that can AI replace the data analytics job? I am going to end your course on data analytics but I have heard that soon AI can replace it. Thanks

[@IhuomaGeraldine]

Please I need help.. I don’t think I have the data for parks department

[@hisokaamorou4211]

awesome...

[@Earthlighte]

Sir, you've recommended Udemy and Coursera.... what about Analyst Builder for certification?

[@AlexTheAnalyst]

I think my courses are a little bit better than what you'll find on Udemy and there are practice questions integrated into the course too which Udemy doesn't have. It does have a Certificate at the end just like Udemy has :)

[@jimieJimieMaverickstarz]

How much roughly your course fee​@@AlexTheAnalyst?

[@glenmartin952]

I have notice something when he is renaming or assigning names, He uses AS sometimes and not in the others, Am I missing somthing?

[@Hirenkn]

Pls refer to limit + aliasing inmy sql video....

[@SareyFarah]

Have you ever Prepared already for Trigger?

[@imvimalkumar007]

Is it alright if I don't get it in the first go?

[@realdealisai]

hey Alex do you still have the patreon page ?

[@pragatheeshm.sc.577]

Why are you deleting or hiding videos ?

[@beslandaur7729]

“Let’s look at a very serious use case for self-join”… Proceeds to funding secret santa. But what’s the real purpose of self-join in a real-world? Why would you want to join a table to itself? Just trying to understand

[@momohtimothy6898]

Honestly, the self join looks complicated to me.

[@albertayeh-sarpong1264]

Which version kf SQL is this

[@Monica14560]

where i can download these data

[@AjayAnkit-bt8cp]

indians attendence here🎉😂

[@userwheretogo]

People just keep producing identical content on KZbin. Quite a waste of time

[@TalkdatawithJain]

Don't watch

[@jatinmanhas4966]

thank you so much Alex the Analyst

[@amrabdelatyfathallah2487]

can i ask a question in self join you add 1 ON emp1.employee_id + 1 = emp2.employee_id, However the one added to 'emp2.employee_id ' not 'emp1.employee_id ' ? and another question we apply here self join using inner join , he should return for me only matches emp_id, i mean 2 Leslie Knope 2 Ron Swanson 3 Ron Swanson 3 Tom Haverford 4 Tom Haverford 4 April Ludgate 5 April Ludgate 5 Jerry Gergich ======================================= like this all over until he finished them why he returned for me like self join using left join like result appear in 13:00

[@darwinrojas2208]

At what point do you explain about EMP? 🥲