The Ultimate MongoDB Aggregation Guide: Make Your Queries Soar in One Video

[@EngineeringDigest]

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" } ])

[@swapnilw.]

thank you for this document.

[@datastructuresandalgorithm9370]

Thank you for it.

[@sushilingole8448]

Thank youu...

[@manojmohapatra986]

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🎉

[@EngineeringDigest]

Welcome aboard! 😀

[@poojagarva]

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.

[@EngineeringDigest]

Thanks, this comment made my day :)

[@maullikakbari8200]

one of the best aggregation tutorial available on youtube till now thank you sir.

[@InzamamMalik]

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.

[@EngineeringDigest]

Thanks a ton bro

[@DilipBoidya-bb3be]

I like your accent, your explanations and so i subscribed you. Keep posting more vids.

[@anshulsharma9424]

Sir all of you content is a gold mine for developers.

[@memekannada2901]

benifitted so much from this playlist..appreciate you sir!!

[@EngineeringDigest]

Most welcome!

[@cruzcreez65]

Unique way of teaching.. no boringness ❤❤🎉🎉

[@ShekharTayde-j3k]

Bachpan me hum padhte the ..... 😆..Amazing videos bhai..helped alot.

[@EngineeringDigest]

Thanks 😀 *Instagram:* instagram.com/thevipulvats *Discord:* discord.gg/7e6WdBJ9dT

[@parmaryash4406]

Finally found great video for mongodb aggregation queries, really thank you so much

[@DevilDoer9224]

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."

[@kishankumar-ze5pf]

most underrated channel

[@JonayedAhamad-m5n]

Subscribed, Your teaching style is something unique😊😊

[@KhushaliChauhan-o1b]

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 ..

[@EngineeringDigest]

Thanks😀

[@SawanKumar-tr9xz]

Best mongodb playlist ❤

[@EngineeringDigest]

Thanks! 😊 Join my Insta fam: @thevipulvats

[@RohitPatil-cr2dr]

Bhai ek number padhaya hai next level ❤❤❤

[@nobitaa32]

Op sir first time aaya hu kya hi technique he aapki padhaneki

[@tanmaychavan743]

Just please never stop making such amazing videos ❤❤

[@Rajugupta-gp2eg]

Awaiting next video !!

[@EngineeringDigest]

Thanks bro, Please support us by sharing the channel with your colleagues 🤝

[@noedition1968]

Such a beautiful information for mongodb pipeline. Thanks a lot for this valuable video ❤

[@fatimaiqra2169]

thanks a lot for such a deeper explanation!

[@ashwinchaudhary5730]

Awesome explaination with multiple examples, thanks

[@stiphenrobert4469]

Best mongodb tutorial on earth

[@taukirkhan3417]

Mza agya bro, enjoy and completely understand. Thanks

[@EngineeringDigest]

Thank you brother, it will be a huge help if you can share this course on LinkedIn.

[@nemotivity]

Loved the video. Waiting for the next one. Keep making such awesome tutorials. ♥

[@EngineeringDigest]

Thanks a lot 😊

[@pritimodanwal06]

very nice explain bro, before it i have little bit confusion regarding pipeline now clear thank you bro

[@EngineeringDigest]

You are welcome

[@abhijeetkumarsingh2504]

You Got A Subscriber, loved the way you explain 😂 🔥

[@EngineeringDigest]

Welcome aboard!😀

[@naimhasan5346]

Bhai you are the best! Your teaching style is so unique and interesting. I love it ❤

[@EngineeringDigest]

Thank you so much 😀

[@KaustubhKolhe]

very well explained, thank you sir

[@vaibhavnikalje2655]

Great teaching 🤩

[@sadotore]

vai, a big "THANK YOUUU" for u

[@AnilKumar-fw8bw]

Thank you for explaining in a simple way.

[@anandatole6529]

explain in simple way. no complex. Thanks

[@EngineeringDigest]

Glad you liked it!

[@ummeed4365]

Excellent content bhai highly appreciate your efforts.

[@EngineeringDigest]

Thanks! 😊 You can join our discord or Insta @thevipulvats.

[@sohammehta6614]

Thank your very much for the great explanation!!

[@mahirjain5833]

Love your tutorials.Pls cover entire mongo db.

[@farukkhan6324]

hey man awesome video loved they way you explain waiting for more videos. keep it up

[@EngineeringDigest]

Thanks a ton!

[@dhriteshkumar1786]

awesome explanation sir ❤

[@EngineeringDigest]

Thanks for liking

[@aafibaloch654]

Deserve more views and subscribers ❤

[@EngineeringDigest]

Thanks! 😊 Join my Insta fam: @thevipulvats

[@aditideshmukh4752]

helped a lot! thanks

[@zeeshankalyar7693]

Thanks bhai jaan bahut hi achi video bnae hai apne

[@VivekYadav-up7uu]

easy and effective way to explain.

[@MohammedHasmi577]

Bhai tum reels me dikhte ho vohi hona? Love your videos ❤🎉

[@explorewithsatish1208]

You doing awesome job do it continue 👌🎉❤️

[@EngineeringDigest]

Thank you so much 😁

[@MohammedHasmi577]

Sir i knoe mongodb but still i have learnt a lot of things from this playlist

[@vishalgarna12]

Sirja bhi aa gaya hu❤❤

[@cyrusthapa794]

bhaut hard XD : ) ❤‍🔥

[@IftekharAhmed-f3r]

Fantastic, I learned a lot today

[@vivekkumaryadav9862]

thanks bhaiya ji...ek video or aggregation completed ...:))

[@EngineeringDigest]

Please consider sharing feedback on LinkedIn. 🙏🏻

[@shashanksingh4708]

can you do a video on these complex queries implemented using spring data mongoDB ?

[@foodistan9311]

Please do a video on $lookup as well. BTW a great explanation.

[@EngineeringDigest]

Will do soon, Please support us by joining on Instagram or Discord 🙂

[@foodistan9311]

@@EngineeringDigest Please. waiting for so long

[@prathameshhiremath1379]

Bhai really apka voice bahut katarnak hai

[@EngineeringDigest]

Thanks :)

[@mohdshahnawaz5047]

very good sir.

[@mikeplai4189]

great explaination but need more videos on aggregation with join collections

[@EngineeringDigest]

Will upload soon

[@mikeplai4189]

@@EngineeringDigest Thanks

[@shivamkatiyar2899]

Cool way of teaching.

[@mithilesh8349]

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

[@mithilesh8349]

Help me to write the aggregation for better understanding

[@mikeplai4189]

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, }, }, ]);

[@harsh__dev]

Sir please provide the pdf/cheat sheet as well. By the way love your lectures

[@watchprakhar]

achcha samjhaya bhai apne

[@watchprakhar]

subscribed

[@EngineeringDigest]

Thanks! 😊 Join my Insta fam if u haven’t already: @thevipulvats

[@03devrajtak7]

how to use indexing for aggregation pipeline?

[@manojmohapatra986]

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

[@shamimsarker839]

Best 🔥🔥🔥🔥🔥🔥🔥

[@jyotshnamanjari2372]

You are wonderful. Can you please explain $reduce? Also can you please include datetime in your examples.

[@see_the_nature-stn]

Sir you are great

[@shubhamgupta-bl1tr]

nice video, transaction r bhi bha dijiye

[@EngineeringDigest]

Sure

[@lifeusa2168]

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?

[@ShubhiK-ro8cl]

Last query with filter is not working. Please add correct query here.

[@EngineeringDigest]

ok sir

[@ShubhiK-ro8cl]

No srsly.... it's returning null😶

[@SparkYourMindConnections]

Best Video on internet❤‍🔥 Maza agya

[@EngineeringDigest]

Thanks 🙏 Consider joining our discord or Instagram.

[@abuzubaer3083]

nice explanation

[@rajd2990]

Amazing 👍👍

[@EngineeringDigest]

Thanks! 😊 Join my Insta fam if u haven’t already: @thevipulvats

[@rajverma5051]

Thank you sir ❤

[@datastructuresandalgorithm9370]

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] } ]

[@abhishekbisht3264]

Bhaiya meine mongo db abhi start kara hai kuch tips dedo jisse mein issey achhe se seekh jaaun

[@raiyanabdurrehman1411]

Awesome Video..BTW any idea why the last problem's solution showing avgScores as null??

[@aditideshmukh4752]

yes i am also getting null....dont know why

[@AdarshSingh-mo1kc]

his voice🔥🔥🔥🔥

[@vaishalimandora8956]

Sir is your playlist is sufficient to learn mongodb ...as a node js developer

[@EngineeringDigest]

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.

[@random2059]

👋👋🙏🙏 _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]

05:19

[@random2059]

@@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

[@arnavkaul7827]

Damn good lecture

[@Mehuldeveloper]

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.

[@EngineeringDigest]

Watch indexing video in this playlist

[@Mehuldeveloper]

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

[@khawajamuhammadmushood5455]

can someone explain me the use of dollar sign in aggregate quries

[@EngineeringDigest]

it means you are going to use reserved keyword ( operator )

[@JaiSreeRam466]

Super anna ❤

[@EngineeringDigest]

Thanks! 😊 Join my Insta fam if u haven’t already: @thevipulvats

[@SachinGupta-iy3sz]

Hey, Is there any platform available where we can practice mongodb queries.

[@EngineeringDigest]

Check last video of the playlist

[@hitbymillion]

thanks man : )

[@shashankjain4024]

Informational video. Thanks. However should work on your tone and extra modulation. It breaks the learning rhythm for the audience.

[@EngineeringDigest]

That's why it is free

[@vinitph]

sir can you share your notes with us i would be very grateful

[@preetilangayan6326]

Please make video on replication also.

[@vampirekabir]

cant get it why 44 psychos disliked this such legendary video,absolutely fabulous, amazing

[@harshmehta1141]

Bro Engineering Digest very unique and attractive name

[@EngineeringDigest]

Thanks 🙏

[@rahulmk8698]

Hello Sir, Can you share your docs with us?

[@UsamaArif-c4l]

if two student have same age and same hobbies then what will be output?

[@EngineeringDigest]

friendship

[@OCEMTechZone]

Great🎉

[@varunjaiswar5062]

sir data dal te dal te , fatt gai mere , please provide data in description.

[@vampirekabir]

bro video on $facet and $bucket pls

[@EngineeringDigest]

just recorded, will upload next week

[@vampirekabir]

@@EngineeringDigest thanks, i always look for ur explanation teach in such clear and fun way

[@farhanakhtar5229]

bhai ne news anchor ki job chod kar coder bana he

[@kunal_Jangra]

Plz provide this data you are using we can practice by using it

[@EngineeringDigest]

done, check pinned comment

[@mithleshkumar-ds9ex]

Sir Please database link

[@ihtshamhaider6849]

wow method

[@EngineeringDigest]

Many many thanks

[@swapnilw.]

i think u r from delhi😎

[@EngineeringDigest]

Yess 🤓

[@mikeplai4189]

kamal

[@code-with-me-2002]

bro college teacher ki taraha , line by line padhke hindi translate mat karo

[@EngineeringDigest]

karunga

[@ronakreddy8657]

@Music-ub2gc car racing krle tu.. galat jagah aa gya bodam