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

Kurisu
Backend>Questions

Can I add Discourse as a forum feature to any website no matter its backend language?
Hello, Please, let’s say I have a website with user authentication made with Elixir/Phoenix, and now want to add a forum to it (using a ...
#forum#discourse
11 1075 3
New
jaimeiniesta
Backend>Questions

Screenshots as a service
I maintain a project that lists hundreds of thousands of web pages, and I’d like to show a screenshot for each web page. There are alread...
#screenshots
2 1202 1
New
andrea
Backend>Questions

Can Phoenix LiveView be used in multi-page applications or does it have to be a SPA?
Can Phoenix LiveView be used in multi-page applications, unlike React/Vue/Blazor which seems to be targeted for SPA?
/phoenix#liveview
6 2742 4
New
GermaVinsmoke
Backend>Questions

Programming Elixir or Elixir in Action?
Reading Programming Elixir 1.6 book, I’ve completed part 1 of the book. Now I’m thinking of reading Elixir in Action. What do you all sug...
/elixir
34 2021 8
New
JimmyCarterSon
Backend>Questions

Assistance with Schema Mix
I am confused about the Schema setup, I am setting up a new application and I want to seed files in it as well. I tried to mix to create...
/elixir/phoenix#ecto#troubleshooting#mix
18 1476 7
New
osbre
Backend>Questions

Is there a specification or recommendations on implementing “one-time authentication” link?
Hello everyone I’m trying to implement a “magic link” or “one-time login link” functionality I wonder what a secure way to implement it...
#help-needed
9 1124 2
New
GermaVinsmoke
Backend>Questions

Does anyone know beginner friendly Elixir/Phoenix Open source projects?
Does anyone know beginner friendly Elixir/Phoenix Open source projects? For learning purpose :slightly_smiling_face:
/elixir/phoenix
4 1073 2
New
Ora2pgnewbie
Backend>Questions

Is there a UI for Ora2Pg?
Wanted to check if there is a UI available to use Ora2pg tool.
#postgres/postgresql#ora2pg
2 1524 2
New
Manish_bose
Backend>Questions

Convert long data to wide data in SQL?
Can anyone help me how to convert a long data to wide data in SQL without using hard coding? Regards Manish
#sql
7 987 2
New
apoorv-2204
Backend>Questions

Anyone know how to get into Go from an Elixir background?
Anyone know how to get in golang? I am from elixir background?.
/elixir/go
4 700 1
New

Other popular topics Top

AstonJ
General Dev>Dev Chat

What are you listening to?
A thread that every forum needs! Simply post a link to a track on YouTube (or SoundCloud or Vimeo amongst others!) on a separate line an...
#community#music
202 5126 102
New
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>Hardware

BIIP MT3 Extended 2048 Custom Keycap Set (Drop)
This looks like a stunning keycap set :orange_heart: A LEGENDARY KEYBOARD LIVES ON When you bought an Apple Macintosh computer in the e...
/keyboards#apple#keycaps#mechanical-keyboards
14 6713 7
New
AstonJ
General Dev>Dev Chat

How fast do you type? Check your WPM here!
Do the test and post your score :nerd_face: :keyboard: If possible, please add info such as the keyboard you’re using, the layout (Qw...
typing-speed-test.aoeu.eu
/keyboards
82 7682 31
New
dimitarvp
macOS>Chat

My thoughts on macOS vs Linux
Small essay with thoughts on macOS vs. Linux: I know @Exadra37 is just waiting around the corner to scream at me “I TOLD YOU SO!!!” but I...
#macos#linux
166 9730 69
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
Help
Game Dev>Questions

Can I use Java to program a game for Nintendo switch?
I am trying to crate a game for the Nintendo switch, I wanted to use Java as I am comfortable with that programming language. Can you use...
/java#nintendo
8 4771 3
New
NewsBot
Backend>Official News

Node.js v22.14.0 released!
Node.js v22.14.0 has been released. Link: Release 2025-02-11, Version 22.14.0 'Jod' (LTS), @aduh95 · nodejs/node · GitHub
github.com
/nodejs#official-news
0 4251 0
New
Fl4m3Ph03n1x
AI>Questions

What are the best text-to-speech ai generation tools that you can run locally?
Background Lately I am in a quest to find a good quality TTS ai generation tool to run locally in order to create audio for some videos I...
#ai#text-to-speech
6 7713 3
New
Back to top

Sponsor Spotlight

Erlang Solutions

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

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!"

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!"

View all our sponsors ❯

We're in Beta

About us Mission Statement See our Roadmap