SQL Beginner to Advanced in One Hour | CareerFoundry Webinar
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- Опубликовано: 21 июл 2024
- Today we’ll learn SQL from Beginner to Advanced in One Hour!
A big thanks to CareerFoundry for inviting me to take part in this webinar!
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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
An easier way to explain indexing is to compare it to a book. A book has an index page that shows where to find the topics in a book. So, instead of you going through the entire book to find the topic you're looking for; the index page helps you know where exactly that topic is. Saving you time. Therefore, same thing with SQL queries.
This was a really good comparison,👌🏽
I have to disagree with you, your example is intuitive, but it doesn't explain how and why index is fast. Although index has fewer pages than actual table, but what if your table is huge, and index from this table has a lot of pages? it is still slow (of course faster than scan the whole table) to scan all the pages in the index. And in SQL Server, there is a type of index called clustered index, which stores the whole table data in it instead of a seoarate structure beside table data, so it is basically your book with all the pages and no index section. Other point is indexes are stored on disk just like table data, so no hardware advantage. What make index fast is how the data is stored, data is stored in B+ tree structure, which make seek operators fast.
Dude, you’re here to save the day, you don’t even need someone to ask for something you upload the most awesome content, was in the bank the other day and the banker asked me about DataAnalysis content i was just about to recommend your channel but the guy already knew your channel had the best content,
Greeting from Egypt 🇪🇬, God bless you and your family Alex ♥️✨
Hello Alex, I just found out about your channel, and I am impressed with what I have seen thus far. I’m currently studying: CompTia A+, Network +, and Security +, in hopes of changing careers from elementary education to the IT industry. Thanks for all the great information! Jalapeños!😊
My name is Femi from Nigeria. I love data analysis because it's enables organizations/businesses get better understanding of its data and make informed decisions with it.
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Who asked?
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Hello, my name is Jonathan from Nigeria. This is my last class with Alex on SQL, I watch all his videos so I’m happy to be here.
21:55 was such a helpful explanation to better understand what a join does when connecting IDs! love the video! and 53:30 is also super important and good to know for understanding employer expectations!
Thank yu so much for having this up. I love data and facts, it makes the world go round.
My name is Angela from Nigeria. watching your video has really helped me a lot in my career as a data analyst. Though am taking courses on coursera yet i come to watch your video for more clarity. Thanks Alex.
This was so informative, thank you CarreerFoundry and Alex!
I wish I could spend some time with this guy. I would put myself at probably an intermediate skill level with SQL which is one of my main functions in my job... but I have a lot to learn.
Hello, I'm from Indonesia. Thank you Alex for making this tutorial. That is very good and easy to understand, this really helped me. 😊
I am in the middle of the Data Analysis course with Coursera. This video has been a great way for me to further review the SQL portion of the course. Thanks for uploading.
Easy as you like it..sleek yet most effective...even slides are designed and curated in a way that explain almost everything related to the topic at first glance...you are the champ bro...
I just watched the replay of this live session, all i can say is thank you Alex.
This is, by far, the greatest Content Creator I've ever found. I'm not exactly a techie, but to avoid ending up on a soup line, I've been learning marketable skills. It's not so common for an individual to be both well-versed in dense techie topics & able to explain it in a brief, understandable, and practical way, but damn, Alex the Analyst... *Thank you*. (No, I wasn't given anything to write this, but am compelled to do so after viewing ATA's content versus those of others, which can be laughably unclear).
Thanks for this wonderful tutorial ❤
This is resourceful. Thank you TEAM
HOLY SHIET! This is PHENOMENAAL
Alex, you are doing a great work. For me, I am kind refresh what I learnt from ATLytiCS boot camp .
Man this is amazing and compared to some of the things i did in c++ i can confidently do this! thank you for the reassurance!!!
Even if i have any difficulty understanding what our tutor says, I'm always running to Alex videos, funny enough, he recommended his video for us some days ago😊
New subscriber and this is my first video. Great content.
Thanks for the video Alex! Where can I download the dataset to follow the steps? Did I miss this part?
from Myanmar, Thank you very much for the channel!!!
Hello Alex,
I am joining from Lagos,Nigeria.
Thanks for this all inspiring content. I’m watching from Sierra Leone 🇸🇱.
Thanks for watching!
Thank you for this good information. for Alex 👏
Dear Alex,
thanks for the insight
Hello Alex, the content is amazing. Congratulations!
31:13 Could you please recommend some tools to help me to identify the bottlenecks to optimize my queries?
Thank you so much
Hi! So happy to be joining. Yemi from Nigeria. I decided to make a 360 degree shift from a completely different field to tech so I get to know more and grow in the data analytics. Hoping to have a substantial amount of knowledge of SQL as a beginner.
Hi Yemi can we connect I'm also starting a data analysis career....so we could learn together...
@@MinChibuikeOkoli Sure, it would be a pleasure.
Hi Femi, i just came across this video today and going through the comments i saw yours and chibuike’s. I wouldnt mind going the team as i making shift too from a totally different career. Hope you dont mind?
@@cynthiaokechukwu4829 Hi Cynthia, that would be a great idea.
How do we go about connecting? Awaiting Chibuike's reply also.
@@MinChibuikeOkoli Hello Chibuike, how do we connect?
Thanks Alex.
Super awesome. Thank you.
will this be only available for a period of time or can i watch the rest another time?
thank you for the video
Great job ❤❤❤ thank you
I am from Louisville Kentucky and I am taking SQL as part of my computer engineering degree
Thanks for the content its a good starter for beginners
Thank you Alex!
Amazing. Thank you
thank you for your job!
Why no time stamps ?
Please update if possible
Tasos from Australia
thank you, Alex , for clearing most of my questions before jumping into the job market. Really enjoyed the whole video.
Keep it Up.
Please can I get the sheet to practice as I watch the video
Didnt know Frodo Baggins was born in 2001.
Also, Thanks for the amazing content Alex !
good work alex work on SQL
Great presentation! Is there a link to the slides?
I honestly don't why the sudden fascination with data analytics. All I know is, it's getting crazier by the day. But with Alex I'm getting better and better!
*Dwight Shrute - Assistant to the Lead Baker* pure gold.
Nothing can compete Microsoft Excel. It may look not fancy, but superb functionality
Looking forward to learn SQL
from where can i get this data set
I am joining from Pakistan
Oliver from Kenya
Please can I run all these code on PopSQL
Learning in South Sudan 🇸🇸
My name Njoku Samuel joining from Nigeria. I am intersented in data analytics
thanks
13:23 What was the purpose of the 'AS salary' statement here? I don't quite understand the meaning of 'naming' an output as it is being used here, since 'AVG(salary)' could do the job, maybe?
Awesome work you're doing here, Alex! Thanks!
You don’t have to include the “AS salary”, but it’s good practice to explicitly define the column name when you use a function with “group by”.
If you remove “AS salary” from the query it will still give you the same output, BUT the second column wouldn’t have a name (in SQL Server it would display “No Column Name” for the second column).
Just a side note: In his example, it would’ve improved readability if he used “AS avg_salary” instead.
@@MapleSyrup473 Thanks!
Interesting
I really wanted to complete the course. But I use Mac M2. I think I am not having proper guideline about how to setup. I tried through docker and terminal command. It was going okay until my azure studio is not able to find my localhost and could not get connected. I wish I could get a solution of the pretty unknown problem.. :(
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Is this enough for a fresher to enter data analyst field
what of statistics?
Is this video enough for data analyst ???!
good.from africa
That's all. I think its more than that.
Love from Pakistan 🙂🙂
I really appreciate this video but it has a title that’s not quite right. The only thing that is advanced is window function and there is a very short mention about it.
Once we got to join and sbqueries I was sweating. When we got to window functions, I started crying T-T
I started programming around 12 years old. I've been a software engineer for 20 years (C# and SQL mainly). In college I had to take Calculus and Statistics to get my CS degree. Waste of time! I've worked and major Banks and Insurance companies. I don't think I've did much above basic algebra. As long as you know the logic the computer will do it for you.
I really I am Alex videos fun.
is he using SQL Server Managment Studio?
I am Azeez Wahab Oloyede from Nigeria. Want to be a data analyst.
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part about windows functions is just bad. better skip it
This SQL video is a waste of time. If any beginner like me in sql has came here to learn sql then please find something else.
Why are there no fucking captions!!!! 😭
Now, there are closed captions and a transcript. Maybe they just hadn't had time to generate at the time you watched?
Terrible examples, never ever ever ever use subqueries in WHERE clause
could you do something like this for python too? I'm struggling so much with python...
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