Backend>Questions

How to Efficiently Find and Remove Duplicates in a Large SQL Database?

harwind

harwind

How to Efficiently Find and Remove Duplicates in a Large SQL Database?

I have a large SQL database with millions of records, and I’ve identified duplicate entries. What’s the most efficient way to find and remove these duplicates without compromising database performance or data integrity? Are there any best practices or SQL queries that can help in this situation?"

This question addresses a common database maintenance task and invites SQL experts to share their knowledge on efficiently identifying and dealing with duplicate records in a large database.

View thread on forum
#question
1 666 0

Where Next?

View thread on forum
question
Home Backend>Questions
#question
1 666 0
Last post

Popular Backend topics Top

wolf4earth
Backend>Questions

AWS: Best practices implementing fan-out with SNS and SQS
At work we plan to replace a totally overkill Kafka instance with a combination of SNS and SQS. I don’t want to get into a discussion on ...
#aws#aws-sns#aws-sqs#terraform
3 1027 0
New
dimitarvp
Backend>Questions

Open datasets that are in SQLite format or convertible to it?
Hey everyone, I resumed work on my Elixir <=> SQLite library (which uses a Rust NIF underneath) and I am in a need of small and we...
/elixir#sqlite
11 1344 6
New
mrmurphy
Backend>Questions

How exactly does phx-update detect changes?
I’ve run into a situation where I’ve got a list of posts inside of a container that uses phx-update=“prepend”, and the posts on the socke...
/elixir
16 1233 6
New
bsek43
Backend>Questions

Phoenix LiveView learning resources?
Hello everyone, I’ve started learning Elixir and Phoenix few months ago and while I mostly grasped Elixir’s functional concepts and Phoe...
/phoenix
10 1551 3
New
Fl4m3Ph03n1x
Backend>Questions

Is there a way to have Elixir Records without default values?
Background I am trying to find a cheap and easy way to create New Types in Elixir, and Records seem to be just what I would need. Probl...
/elixir
10 1230 2
New
jeya
Backend>Questions

Pytest: test fails while getting URL
Dear Geeks I am new to pytest. I am following a youtube channel. I am writing the same code. learning to test login functionality of an...
/python#pytest
23 1835 12
New
sona11
Backend>Questions

isReachable in Java throws an IOException
If isReachable throws an IOException in Java, what is the right step to do and why? The application, I believe, should halt the process ...
/java
1 893 0
New
Fl4m3Ph03n1x
Backend>Questions

How to get the top X results of a given category using Ecto?
Background I have to queries that return a colossal amount of data on their own. I cannot use Repo.all as doing so would materialize thes...
/elixir#ecto
4 1072 3
New
pillaiindu
Backend>Questions

What's wrong with my Phoenix LiveView code?
Currently reading the book “Programming Phoenix LiveView”. At the end of the Chapter 1, I’m trying to solve the guess game. If the user ...
/elixir/phoenix#liveview
6 1007 4
New
Shiny
Backend>Questions

What do you think is a good direction to go for someone with a Rails background?
Hey community, this is my first post here so I will try to be as concise as possible and I appreciate any feedback. I’ve been writing Ro...
/ruby/rails#help-needed
18 727 11
New

Other popular topics Top

PragmaticBookshelf
Backend>Learning Resources

Testing Elixir
Write Elixir tests that you can be proud of. Dive into Elixir’s test philosophy and gain mastery over the terminology and concepts that u...
pragprog.com
#pragprog/elixir#published-book/book-testing-elixir
33 5004 8
New
AstonJ
General Dev>Dev Chat

Which language or framework do you want to learn next?
Curious to know which languages and frameworks you’re all thinking about learning next :upside_down_face: Perhaps if there’s enough peop...
#community#learning
247 7246 91
New
AstonJ
General Dev>Hardware

Custom keyboard keycaps
There’s a whole world of custom keycaps out there that I didn’t know existed! Check out all of our Keycaps threads here: https://forum....
#hardware/keyboards#keycaps#mechanical-keyboards
15 11086 19
New
AstonJ
Backend>Chat

How to install Ruby 3 with ASDF
In case anyone else is wondering why Ruby 3 doesn’t show when you do asdf list-all ruby :man_facepalming: do this first: asdf plugin-upd...
/ruby#asdf
11 5961 4
New
PragmaticBookshelf
Backend>Learning Resources

Python Testing with pytest, Second Edition
Create efficient, elegant software tests in pytest, Python's most powerful testing framework. Brian Okken @brianokken Edited by Kat...
pragprog.com
#pragprog/python#published-book/book-python-testing-with-pytest-second-edition
16 7461 4
New
PragmaticBookshelf
Backend>Learning Resources

Programming WebRTC
Use WebRTC to build web applications that stream media and data in real time directly from one user to another, all in the browser. ...
pragprog.com
#pragprog#published-book/js#webrtc/book-programming-webrtc
27 6969 6
New
AstonJ
AI>Chat

How to: Run DeepSeek on Mac, Windows, and Linux!
This is a very quick guide, you just need to: Download LM Studio: https://lmstudio.ai/ Click on search Type DeepSeek, then select the o...
#macs/deepseek#guides#lm-studio
14 9328 10
New
PragmaticBookshelf
Backend>Learning Resources

Programming Clojure, Fourth Edition
Quickly turn complex problems into simple, working solutions using functional programming, safe concurrency, and the expressive tools of ...
pragprog.com
#pragprog
4 1975 3
New
CommunityNews
Game Dev>In The News

Grand Theft Auto: Vice City | DOS games in browser
Open-source implementation of the classic GTA engine now running directly in your browser. Experience the reVC technology demo on DOS.Zon...
dos.zone
#games#browser
0 173 0
New
xiji2646-netizen
AI>Chat

Has anyone tried the Karpathy CLAUDE.md rules? (97.8k stars)
There’s a GitHub repo at forrestchang/andrej-karpathy-skills that’s sitting at 97.8k stars. It’s a single CLAUDE.md file with four behavi...
#claude
0 37 1
New
Back to top

Sponsor Spotlight

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Backend>Questions

Backend Questions ❯

Latest on Devtalk

Devtalk ❯

We ❤️ helpful members!

We reward our most helpful members via our MOTM scheme - by giving away a whopping 25 books per year!

Member of the Month

Devtalk Sponsors

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Erlang Solutions

We build trusted fault-tolerant systems that scale to billions of users.

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

EEF

Supporting innovation across the BEAM ecosystem.

coders51

We build reliable cloud platforms for business-critical systems.

Manning Publications

Develop your skills with books, videos, and courses.

AppSignal

Catch errors, track performance, monitor hosts and more.

WyeWorks

Enabling companies to succeed by building software people love.

Pragmatic Studio

Courses that move you from confusion to "Aha, now I get it!"

Linux New Media

Publishing Linux Magazine, ADMIN, and MakerSpace for 25+ years.

View all our sponsors ❯

Categories:

Sub Categories:

Popular Portals

Devtalk Sponsors

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Erlang Solutions

We build trusted fault-tolerant systems that scale to billions of users.

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

EEF

Supporting innovation across the BEAM ecosystem.

coders51

We build reliable cloud platforms for business-critical systems.

Manning Publications

Develop your skills with books, videos, and courses.

AppSignal

Catch errors, track performance, monitor hosts and more.

WyeWorks

Enabling companies to succeed by building software people love.

Pragmatic Studio

Courses that move you from confusion to "Aha, now I get it!"

Linux New Media

Publishing Linux Magazine, ADMIN, and MakerSpace for 25+ years.

View all our sponsors ❯

We're in Beta

About us Mission Statement See our Roadmap