Think the output shown in video for "WHERE NOT EXISTS" is incorrect. It should fetch 2 values instead of 1. It should be "Magical Products" and "Amazing Stuff" as both of them have items less than 1 $
@ihsanqadir888827 күн бұрын
How to apply
@welearnsql27 күн бұрын
Go to LearnSQL.com, sign up for free, and check how it works. If you will find it worth it, by All Forever Package, which is a pack of all our available SQL courses.
@Priyankayadav-zt8ckАй бұрын
What if we need column name , instead of aggregates ?
@naomirono83262 ай бұрын
Kindly help me understand what data types did you use
@ehsanmashkoor972 ай бұрын
video is good but background music is so annoying.
@user-bt5sd9zz6x2 ай бұрын
That was quite helpful, thank you so much, but would you mind turn off the background music, it's distracting, I can barely hear your voice.
@MFM888323 ай бұрын
Please remove background music, hard to focus on what you're saying. Otherwise, great video!
@HollyRamsey-yq2xi3 ай бұрын
Hello, I recently purchased the $90 lifetime access course package. I lost my login credentials and have been locked out of my account. A password reset is not working. Can someone please help me get access to my account. Thanks.
@maheshmenta60783 ай бұрын
thank u
@benkunz3 ай бұрын
Hi, where could i find the solution for the common error you described at 3:35 (=Common mistake #2) ?
@akash1774 ай бұрын
Your videos are really very helpful to me to learn SQL with great explanation, thank you a lot.
@milad123214 ай бұрын
The result in 2:12 only should have one column "ID". Learn yourself sql before teaching.
@MarioCapurso4 ай бұрын
This book could help ... Data Science and Engineering - A learning path - Volume 4 Relational and non-relational databases and SQL: with applications in MySQL, SQLite and Orange Data Mining
@MarioCapurso4 ай бұрын
This book could help ... Data Science and Engineering - A learning path - Volume 4 Relational and non-relational databases and SQL: with applications in MySQL, SQLite and Orange Data Mining
@sqllearning5 ай бұрын
ر
@DCh-ks6ug5 ай бұрын
that was good
@dragangolic65155 ай бұрын
Absolute brilliant example and explanation. Thank you!!!
@thorstenl.49285 ай бұрын
Good overview. Thanks. I'd like to add one thing to keep in mind. It seems easy to consider this and use is null instead. However the pitfall is, when you compare against a column value (e.g. in a join), where null values exist. Or when you use optional user inputs and try something like this: tbl.col = NVL({input}, tbl.col) When this columns contains nulls then this becomes tbl.col = null what fails. (Here the solution could be tbl.col = {input} or {input} is null) The danger is, when you get a good looking resultset and don't recognize, that you compare against null!
@DaPashtoSazAwaz5 ай бұрын
Your videos are great. Not sure why included this background music. You just ruined your efforts.
@shankarghimire44925 ай бұрын
Thank you, Adrian! Your videos are short and sweet. Worth them to watch. Really loved them. Thanks!
@ravikumarm30385 ай бұрын
do we get a solution and explanation for practice problems?
@KnownStrangerr5 ай бұрын
I'm really trying to listen to you but the music is so annoying...
@fernygd5 ай бұрын
Excellent explanations, now I'm your subscriber.😊
@tyronefrielinghaus34675 ай бұрын
Please : get RID OF THE MUSIC..can hardly hear you
@tyronefrielinghaus34675 ай бұрын
AARGH.......whats with the super intrusive music? overshadows what you're saying. NOt watching anymore.
@alanbull42196 ай бұрын
Good video - but please ditch the annoying background music
@kingtau6 ай бұрын
Yes, on my way!!
@Jimmy_Neutron7 ай бұрын
Raise the music so we can’t hear you ❤
@ravishmahajan93147 ай бұрын
What will happen if we put reverse in subquery City. Countryid = bigCity.CountryID? Is this same?
@sathiyaabi68837 ай бұрын
Hi How to join this course?
@kamuranpeker1327 ай бұрын
Teşekkürler dostum
@MagnusAnand7 ай бұрын
Quick and to the point !
@Dear07057 ай бұрын
Good video. But you may consider to reduce the background sound or drop it altogether. Thanks. Good job tho. Peace
@IvanDerzhyloCIQ7 ай бұрын
is't better use distinct in subquery? `SELECT * FROM city WHERE id IN (SELECT DISTINCT city_id FROM university WHERE rank <= 100);`
@kingtau8 ай бұрын
You should try and find people to interview who have learned SQL and how it has helped their career!
@welearnsql7 ай бұрын
Hi, are you one of those people?
@kingtau7 ай бұрын
@@welearnsql I'm working on it! I will be in the near future!
@anilarkay8 ай бұрын
Just wanted to get a brush up on some SQL topics, and your video was really helpful. But please, please do not put music on such a lecture video. It is really disturbing the purpose of the instructor, most of the words were not audible.
@virginiatenoriovelasquez20198 ай бұрын
Thank you so much. I finally understood how they work 🥺
@MrBicholino8 ай бұрын
What an amazing explanation! Congrats from Brazil.
@chinnyuche10929 ай бұрын
Thank you for the explanation but please can you reduce the background sound in subsequent videos, it was overshadowing your voice and was quite distracting. Thanks again
@timesothanayongkul49239 ай бұрын
Thank you, I was confused about this for a bit. You video really cleared this up!
@veeek89 ай бұрын
Brilliant thank you
@veeek89 ай бұрын
Really clear videos, great stuff
@0wnSecret9 ай бұрын
(This course is very technical to listen in english (because i'm french) it looks very interesting but really the music in the background is really disturbing .. i can't listen)
@abusuffian92219 ай бұрын
Thanks
@stickercode10 ай бұрын
I couldn't still get it. So , what is the real function of this exists though? If we, let's say remove it from your query sample, what will be fundamentally changed in the result set?
@davidcorona64411 ай бұрын
Great video! I just want to add that subqueries in the select statement are also referred to as 'subselects' and that a subselect query can reference columns in the select query. However, subqueries used in join cannot. Queries used in joins can also have multiple columns and are similar to a common table expressions (CTE). In SQL the only parts you need single-row unique columns are in: subselects and in where clause subqueries.
@mohamednouri99711 ай бұрын
thank you for this amazing explanation but the first one we can do like this select * from students where age > (select min (age ) from lecturer);
@laszlogergelykiss392111 ай бұрын
Music is bothering...
@shakib_0411 ай бұрын
Q1: Is there any student older than all lecturers in the university? Q2: Is there any lecturer who is younger than all students?