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
1 301 0

Popular Backend topics Top

AstonJ
Backend>Questions

Erlang's not installing on macOS Big Sur "You are natively building Erlang/OTP for a later version of MacOSX than current version"
Just done a fresh install of macOS Big Sur and on installing Erlang I am getting: asdf install erlang 23.1.2 Configure failed. checking ...
#macos/erlang#big-sur#asdf
10 5465 8
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 1701 8
New
gagan7995
Backend>Questions

Please tell me how to write a query for this in nodejs
API 4 Path: /user/following/ Method: GET Description: Returns the list of all names of people whom the user follows Response [ { ...
/nodejs
7 2927 3
New
Fl4m3Ph03n1x
Backend>Questions

How to set env vars on GitHub Actions for a Windows release?
Background I am trying to get a Github Action working with Windows and Bakeware because I am trying to create a release using it. Howeve...
/elixir#github
6 784 1
New
Fl4m3Ph03n1x
Backend>Questions

How to have custom enconding for struct using Jason?
Background I am trying to encode a structure into json format using the Jason library. However, this is not working as expected. Code L...
/elixir#json
6 2386 1
New
Fl4m3Ph03n1x
Backend>Questions

Ecto multiple streams in 1 transaction
Background PS: the following situation describes an hypothetical scenario, where I own a company that sells things to customers. I have ...
/elixir#backend
5 1204 2
New
sona11
Backend>Questions

Java equals() selection
In Java, if I try to do.equals() on a null string, a null pointer error is issued. I’m wondering whether I can perform the following if I...
/java
4 669 3
New
Fl4m3Ph03n1x
Backend>Questions

How to typespec guards in a human friendly way?
Background I am a fan of dialyzer and friends (looking at Gradient) and I try to have sepcs in my code as much as I can. To this end, I a...
/elixir#types#dialyzer
3 645 1
New
Fl4m3Ph03n1x
Backend>Questions

Gradient does not recognize type of TypedStruct structures
Background I have a module that uses TypedStruct to create structs. This is the code: defmodule Shared.Data.Authorization do @moduledo...
/elixir#gradient#struct
6 601 2
New
KnowledgeIsPower
Backend>Questions

Do your company uses microservices?
Is it monolithic or using micro-services?
#backend
5 530 3
New

Other popular topics Top

AstonJ
Science/Tech>Tech Chat

What are you watching?
Or looking forward to? :nerd_face:
#community
480 9259 251
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
241 5677 93
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 8008 19
New
Exadra37
macOS>Chat

Your Mac Isn't Yours - worse, it spies on you and sends it home unencrypted
On modern versions of macOS, you simply can’t power on your computer, launch a text editor or eBook reader, and write or read, without a ...
sneak.berlin
#macos#macs#big-sur#apple#privacy#mac-privacy
24 3515 24
New
Exadra37
Linux>Chat

RancherOS is in end of life
Oh just spent so much time on this to discover now that RancherOS is in end of life but Rancher is refusing to mark the Github repo as su...
#linux#rancheros
10 5049 6
New
PragmaticBookshelf
Backend>Learning Resources

Concurrent Data Processing in Elixir
Learn different ways of writing concurrent code in Elixir and increase your application's performance, without sacrificing scalability or...
pragprog.com
#pragprog/elixir#published-book/book-concurrent-data-processing-in-elixir
78 3767 24
New
PragmaticBookshelf
Community>In The Spotlight

Spotlight: Paolo Perrotta (Author)
“A Mystical Experience” Hero’s Journey with Paolo Perrotta @nusco Ever wonder how authoring books compares to writing articles?...
#community#author-spotlight/book-programming-machine-learning/book-metaprogramming-ruby-2
31 3434 15
New
Maartz
General Dev>Dev Chat

Roc Language - a new purely functional programming language built for speed and ergonomics
Hi folks, I don’t know if I saw this here but, here’s a new programming language, called Roc Reminds me a bit of Elm and thus Haskell. ...
#programminguages#functional-programming
49 4271 14
New
AstonJ
Backend>Questions

Psql: error: connection to server on socket "/tmp/.s.PGSQL.5432" failed: No such file or directory
If you’re getting errors like this: psql: error: connection to server on socket “/tmp/.s.PGSQL.5432” failed: No such file or directory ...
#macos/rails/postgresql
1 1804 1
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
13 4063 10
New
Back to top

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.

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'll 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.

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'll 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