Working as a developer from last 4 yrs but i didnt know some operators even exists.. thank you for your support . Watching your videos is like bliss af🎉
Your MongoDB playlist is absolutely fantastic! Your tutorials and explanations make it so easy to understand and follow. I've been searching for a reliable resource to learn MongoDB, and your playlist makes it easier for me to apply what I've learned to my own projects.
Love you bro, being technical matters but you have got god gifted teaching skill along with technical competency. always spare some of your time for teaching. found your video very helpful and will recommend to others for sure. no click bate no gimmicks pure knowledge with nicely organised flow.
Great video no doubt but at 31:50 I am getting output as [ { _id: null, avgS: null } ] and my query is db.students.aggregate([{$group:{_id:null, avgS:{ $avg:{ $filter:{ input:"$scores",as:"score",cond:{ $gt: ["$score",12]}}}}}}]). What could be wrong? And this is what Chatgpt says "The problem with your query is that the $filter operator is being used in a way that doesn't make sense for calculating the average of the scores for students older than 12. Specifically: Incorrect Use of $filter: The $filter operator is intended to filter elements within an array, but you are using it to compare age, which is not an array element. Invalid Condition: The condition {$gt:["$age",12]} inside $filter is intended to filter array elements based on a property of the array elements themselves, but age is a top-level document field, not a property within the scores array."
Problem statement : In a Json file or Mongo there is an Object contains Company name and Gender, You Have to find the count of female and male in a seperate column for each company. ex: Company Male female A 22 10 B 20 18 C 10 30
Dont know on the area you expertise on. But if you create some playlist on devops (as not much good resourse available) , gcp , aws etc. trust me uh ll be unbeatable. Mark my words
It will help you to query the database directly and basic understanding of mongodb. Then you have to learn mongoose which makes node js to connect and query the database.
Bro, can you help me? I'm working with a MongoDB database with 5 million records. When I fetch the total count based on sum or query, the query execution is becoming very slow.
i've watched your video on indexing and have applied the techniques but due to large data collection giving same result is there any other techniques ? @@EngineeringDigest
👋👋🙏🙏 _id kaise age ho sakta hai id to id hai , ( _id:"$age") age acting like _id keya ho rah hai inha pe thora samjhaye , please clear this confusion ???👋👋🙏🙏 thora dhundne par pata chala isko accumulator object bolte hai .... thora ispe v batye .. please reply
@@EngineeringDigest samjha to ye _id uo wala _id nahi nahi hai ye ac new _id banrahe ho age ke basis pea ? 🙏🙏🙏🙏 bata please do maine full video dekha hai note v bana raha hu .... mujhe 5:19 thora samaj nahi aya sir
aap ka smjhana acha hay but behavior thora accha kariya bate thora dhang say koriya bohot karush lagata hay ..lakin apnay best aggregation concept samjaya hay .-__-
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Use this as sample data, it is not the same. But will do the work
db.teachers.insertMany([
{ "_id": 1, "name": "John Doe", "age": 35, "gender": "male" },
{ "_id": 2, "name": "Jane Smith", "age": 40, "gender": "female" },
{ "_id": 3, "name": "Michael Johnson", "age": 45, "gender": "male" },
{ "_id": 4, "name": "Emily Williams", "age": 30, "gender": "female" },
{ "_id": 5, "name": "Robert Brown", "age": 38, "gender": "male" },
{ "_id": 6, "name": "Emma Jones", "age": 33, "gender": "female" },
{ "_id": 7, "name": "William Davis", "age": 37, "gender": "male" },
{ "_id": 8, "name": "Olivia Miller", "age": 41, "gender": "female" },
{ "_id": 9, "name": "David Wilson", "age": 36, "gender": "male" },
{ "_id": 10, "name": "Sophia Moore", "age": 32, "gender": "female" },
{ "_id": 11, "name": "Richard Taylor", "age": 39, "gender": "male" },
{ "_id": 12, "name": "Isabella Anderson", "age": 43, "gender": "female" },
{ "_id": 13, "name": "Joseph Thomas", "age": 34, "gender": "male" },
{ "_id": 14, "name": "Mia Jackson", "age": 42, "gender": "female" },
{ "_id": 15, "name": "Charles White", "age": 36, "gender": "male" },
{ "_id": 16, "name": "Abigail Harris", "age": 31, "gender": "female" },
{ "_id": 17, "name": "Daniel Martin", "age": 44, "gender": "male" },
{ "_id": 18, "name": "Evelyn Thompson", "age": 38, "gender": "female" },
{ "_id": 19, "name": "Matthew Garcia", "age": 37, "gender": "male" },
{ "_id": 20, "name": "Sofia Martinez", "age": 35, "gender": "female" },
{ "_id": 21, "name": "Andrew Robinson", "age": 40, "gender": "male" },
{ "_id": 22, "name": "Grace Clark", "age": 33, "gender": "female" },
{ "_id": 23, "name": "Joshua Rodriguez", "age": 39, "gender": "male" },
{ "_id": 24, "name": "Avery Lewis", "age": 42, "gender": "female" },
{ "_id": 25, "name": "Christopher Lee", "age": 37, "gender": "male" },
{ "_id": 26, "name": "Chloe Walker", "age": 31, "gender": "female" },
{ "_id": 27, "name": "Kevin Hall", "age": 44, "gender": "male" },
{ "_id": 28, "name": "Zoey Allen", "age": 38, "gender": "female" },
{ "_id": 29, "name": "Brian Young", "age": 36, "gender": "male" },
{ "_id": 30, "name": "Harper King", "age": 34, "gender": "female" }
])
thank you for this document.
Thank you for it.
Thank youu...
Working as a developer from last 4 yrs but i didnt know some operators even exists.. thank you for your support . Watching your videos is like bliss af🎉
Welcome aboard! 😀
one of the best aggregation tutorial available on youtube till now thank you sir.
Your MongoDB playlist is absolutely fantastic! Your tutorials and explanations make it so easy to understand and follow. I've been searching for a reliable resource to learn MongoDB, and your playlist makes it easier for me to apply what I've learned to my own projects.
Thanks, this comment made my day :)
I like your accent, your explanations and so i subscribed you. Keep posting more vids.
Love you bro, being technical matters but you have got god gifted teaching skill along with technical competency. always spare some of your time for teaching. found your video very helpful and will recommend to others for sure. no click bate no gimmicks pure knowledge with nicely organised flow.
Thanks a ton bro
benifitted so much from this playlist..appreciate you sir!!
Most welcome!
Sir all of you content is a gold mine for developers.
Unique way of teaching.. no boringness ❤❤🎉🎉
Finally found great video for mongodb aggregation queries, really thank you so much
Subscribed, Your teaching style is something unique😊😊
Bachpan me hum padhte the ..... 😆..Amazing videos bhai..helped alot.
Thanks 😀
*Instagram:* instagram.com/thevipulvats
*Discord:* discord.gg/7e6WdBJ9dT
Great video no doubt but at 31:50 I am getting output as [ { _id: null, avgS: null } ] and my query is db.students.aggregate([{$group:{_id:null, avgS:{ $avg:{ $filter:{ input:"$scores",as:"score",cond:{ $gt: ["$score",12]}}}}}}]). What could be wrong? And this is what Chatgpt says "The problem with your query is that the $filter operator is being used in a way that doesn't make sense for calculating the average of the scores for students older than 12. Specifically:
Incorrect Use of $filter: The $filter operator is intended to filter elements within an array, but you are using it to compare age, which is not an array element.
Invalid Condition: The condition {$gt:["$age",12]} inside $filter is intended to filter array elements based on a property of the array elements themselves, but age is a top-level document field, not a property within the scores array."
wow...its very first time ,I am watching your videos but really....its awesome your way to convey the concept is literally different from other ..
Thanks😀
most underrated channel
Best mongodb playlist ❤
Thanks! 😊 Join my Insta fam: @thevipulvats
Just please never stop making such amazing videos ❤❤
Op sir first time aaya hu kya hi technique he aapki padhaneki
Mza agya bro, enjoy and completely understand. Thanks
Thank you brother, it will be a huge help if you can share this course on LinkedIn.
Such a beautiful information for mongodb pipeline. Thanks a lot for this valuable video ❤
very well explained, thank you sir
Awesome explaination with multiple examples, thanks
Awaiting next video !!
Thanks bro, Please support us by sharing the channel with your colleagues 🤝
Loved the video. Waiting for the next one. Keep making such awesome tutorials. ♥
Thanks a lot 😊
thanks a lot for such a deeper explanation!
Best mongodb tutorial on earth
Thank you for explaining in a simple way.
very nice explain bro, before it i have little bit confusion regarding pipeline now clear thank you bro
You are welcome
Great teaching 🤩
Excellent content bhai highly appreciate your efforts.
Thanks! 😊 You can join our discord or Insta @thevipulvats.
You Got A Subscriber,
loved the way you explain 😂 🔥
Welcome aboard!😀
Bhai you are the best! Your teaching style is so unique and interesting. I love it ❤
Thank you so much 😀
Thank your very much for the great explanation!!
Love your tutorials.Pls cover entire mongo db.
Bhai tum reels me dikhte ho vohi hona? Love your videos ❤🎉
explain in simple way. no complex. Thanks
Glad you liked it!
Sir i knoe mongodb but still i have learnt a lot of things from this playlist
thanks bhaiya ji...ek video or aggregation completed ...:))
Please consider sharing feedback on LinkedIn. 🙏🏻
vai, a big "THANK YOUUU" for u
You doing awesome job do it continue 👌🎉❤️
Thank you so much 😁
hey man awesome video loved they way you explain waiting for more videos. keep it up
Thanks a ton!
awesome explanation sir ❤
Thanks for liking
Deserve more views and subscribers ❤
Thanks! 😊 Join my Insta fam: @thevipulvats
Thanks bhai jaan bahut hi achi video bnae hai apne
easy and effective way to explain.
helped a lot! thanks
Fantastic, I learned a lot today
Please do a video on $lookup as well.
BTW a great explanation.
Will do soon, Please support us by joining on Instagram or Discord 🙂
@@EngineeringDigest Please. waiting for so long
Best Video on internet❤🔥 Maza agya
Thanks 🙏
Consider joining our discord or Instagram.
Sirja bhi aa gaya hu❤❤
can you do a video on these complex queries implemented using spring data mongoDB ?
bhaut hard XD : ) ❤🔥
Bhai really apka voice bahut katarnak hai
Thanks :)
nice video, transaction r bhi bha dijiye
Sure
Best 🔥🔥🔥🔥🔥🔥🔥
his voice🔥🔥🔥🔥
Bhaiya meine mongo db abhi start kara hai kuch tips dedo jisse mein issey achhe se seekh jaaun
great explaination
but need more videos on aggregation with join collections
Will upload soon
@@EngineeringDigest Thanks
very good sir.
Amazing 👍👍
Thanks! 😊 Join my Insta fam if u haven’t already: @thevipulvats
Sir please provide the pdf/cheat sheet as well. By the way love your lectures
Problem statement :
In a Json file or Mongo there is an Object contains Company name and Gender,
You Have to find the count of female and male in a seperate column for each company.
ex:
Company Male female
A 22 10
B 20 18
C 10 30
Help me to write the aggregation for better understanding
const employees = await Employee.aggregate([
{
$group: {
_id: { companyName: "$companyName", gender: "$gender" },
count: { $sum: 1 },
},
},
{
$project: {
_id: 0,
companyName: "$_id.companyName",
gender: "$_id.gender",
count: 1,
},
},
]);
cant get it why 44 psychos disliked this such legendary video,absolutely fabulous, amazing
Thank you sir ❤
Cool way of teaching.
Dont know on the area you expertise on. But if you create some playlist on devops (as not much good resourse available) , gcp , aws etc. trust me uh ll be unbeatable. Mark my words
Your videos are really awesome. I have one question
How can we use two ids while grouping? Is it possible if yes then how. Can you please explain?
how to use indexing for aggregation pipeline?
You are wonderful.
Can you please explain $reduce?
Also can you please include datetime in your examples.
achcha samjhaya bhai apne
subscribed
Thanks! 😊 Join my Insta fam if u haven’t already: @thevipulvats
Last query with filter is not working. Please add correct query here.
ok sir
No srsly.... it's returning null😶
Hey,
Is there any platform available where we can practice mongodb queries.
Check last video of the playlist
Sir is your playlist is sufficient to learn mongodb ...as a node js developer
It will help you to query the database directly and basic understanding of mongodb. Then you have to learn mongoose which makes node js to connect and query the database.
nice explanation
Bro, can you help me? I'm working with a MongoDB database with 5 million records. When I fetch the total count based on sum or query, the query execution is becoming very slow.
Watch indexing video in this playlist
i've watched your video on indexing and have applied the techniques but due to large data collection giving same result is there any other techniques ? @@EngineeringDigest
Hello Sir,
Can you share your docs with us?
Awesome Video..BTW any idea why the last problem's solution showing avgScores as null??
yes i am also getting null....dont know why
Sir you are great
Super anna ❤
Thanks! 😊 Join my Insta fam if u haven’t already: @thevipulvats
Informational video. Thanks.
However should work on your tone and extra modulation. It breaks the learning rhythm for the audience.
That's why it is free
Please make video on replication also.
Damn good lecture
sir can you share your notes with us i would be very grateful
if two student have same age and same hobbies then what will be output?
friendship
Great🎉
thanks man : )
sir data dal te dal te , fatt gai mere , please provide data in description.
👋👋🙏🙏
_id kaise age ho sakta hai id to id hai , ( _id:"$age") age acting like _id keya ho rah hai inha pe thora samjhaye , please clear this confusion ???👋👋🙏🙏 thora dhundne par pata chala isko accumulator object bolte hai ....
thora ispe v batye .. please reply
05:19
@@EngineeringDigest samjha to ye _id uo wala _id nahi nahi hai ye ac new _id banrahe ho age ke basis pea ? 🙏🙏🙏🙏 bata please do maine full video dekha hai note v bana raha hu .... mujhe 5:19 thora samaj nahi aya sir
Bro Engineering Digest very unique and attractive name
Thanks 🙏
can someone explain me the use of dollar sign in aggregate quries
it means you are going to use reserved keyword ( operator )
Plz provide this data you are using we can practice by using it
done, check pinned comment
bhai ne news anchor ki job chod kar coder bana he
bro video on $facet and $bucket pls
just recorded, will upload next week
@@EngineeringDigest thanks, i always look for ur explanation teach in such clear and fun way
Sir Please database link
i think u r from delhi😎
Yess 🤓
kamal
For last filter
[
{
"name": "Vinay",
"age": 34,
"scores": [22, 33, 4, 44, 55]
},
{
"name": "Alice",
"age": 28,
"scores": [10, 20, 30, 40, 50]
},
{
"name": "Bob",
"age": 42,
"scores": [15, 25, 35, 45, 55]
},
{
"name": "Emma",
"age": 31,
"scores": [18, 28, 38, 48, 58]
},
{
"name": "Chris",
"age": 37,
"scores": [12, 22, 32, 42, 52]
},
{
"name": "Sophia",
"age": 29,
"scores": [25, 35, 45, 55, 65]
},
{
"name": "David",
"age": 36,
"scores": [30, 40, 50, 60, 70]
},
{
"name": "Linda",
"age": 45,
"scores": [8, 18, 28, 38, 48]
},
{
"name": "Michael",
"age": 27,
"scores": [16, 26, 36, 46, 56]
},
{
"name": "Emily",
"age": 33,
"scores": [5, 15, 25, 35, 45]
}
]
wow method
Many many thanks
aap ka smjhana acha hay but behavior thora accha kariya bate thora dhang say koriya bohot karush lagata hay ..lakin apnay best aggregation concept samjaya hay .-__-
bhai khadoos hi hu mai..real life me bhi😅
bro college teacher ki taraha , line by line padhke hindi translate mat karo
karunga
@Music-ub2gc car racing krle tu.. galat jagah aa gya bodam