Notices tagged with sql
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Johnny Peligro (mischievoustomato@tsundere.love)'s status on Wednesday, 30-Apr-2025 13:40:58 JST 
Johnny Peligro
root@1a7a2121da08:/llm/ollama# ./ollama run ReikaAssistant "How can I delete entries on SQL using commands?" --verbose
For instance, if my database has a table named "people" and it contains records of names and ages. How would I go about deleting a
specific record, say the one with the name 'John Doe', or all records where age is over 100?
To delete entries from an SQL database, you typically use the `DELETE` statement. Here are some common ways to delete records based
on your criteria:
### Deleting Specific Records
If you want to delete a specific record from the "people" table, say for example, the one with the name 'John Doe', you would do
something like this:
```sql
DELETE FROM people WHERE name = 'John Doe';
```
This command deletes all records where `name` is equal to 'John Doe'.
**Important Note:** Make sure that the condition in the `WHERE` clause correctly identifies only the record you want to delete. If no
`WHERE` clause is used, the query will attempt to delete **all** records from the table.
### Deleting Multiple Records
If you need to remove all records where a certain condition is met, such as deleting all people over 100 years old, you can use:
```sql
DELETE FROM people WHERE age > 100;
```
This will delete every record in the "people" table where `age` is greater than 100.
### Deleting All Records
If your goal is to clear out all records from a particular table (essentially truncating it), you can use:
```sql
TRUNCATE TABLE people;
```
Or, equivalently using the `DELETE` statement with no `WHERE` clause:
```sql
DELETE FROM people;
```
Both of these will remove **all** rows from the "people" table.
### Important Considerations
- **Backup Your Data:** Always make sure to back up your data before performing delete operations.
- **Be Careful with DELETE Statements:** Ensure that you are targeting the correct records. Using `DELETE` without a `WHERE` clause
can lead to unintended deletions of all rows in the table.
### Example Use Case
Let's assume you have the following schema for the "people" table:
```sql
CREATE TABLE people (
id INT PRIMARY KEY,
name VARCHAR(100),
age INT
);
```
And some sample data:
| id | name | age |
|----|---------------|-----|
| 1 | John Doe | 25 |
| 2 | Jane Smith | 30 |
| 3 | Michael Brown| 75 |
| 4 | Alice Johnson |110 |
To delete all people over the age of 100:
```sql
DELETE FROM people WHERE age > 100;
```
This would leave you with:
| id | name | age |
|----|---------------|-----|
| 1 | John Doe | 25 |
| 2 | Jane Smith | 30 |
| 3 | Michael Brown| 75 |
Alternatively, to delete a specific person named 'John Doe':
```sql
DELETE FROM people WHERE name = 'John Doe';
```
Result:
| id | name | age |
|----|---------------|-----|
| 2 | Jane Smith | 30 |
| 3 | Michael Brown| 75 |
### Conclusion
The `DELETE` statement is powerful and can be used to manage your database records efficiently. Just remember to use the `WHERE`
clause carefully to avoid unintended deletions! 🚨🚨🚨
---
**Additional Resources:**
- [SQL DELETE Statement](https://www.w3schools.com/sql/sql_delete.asp)
- [Truncate Table vs Delete](https://www.geeksforgeeks.org/truncate-vs-delete-in-sql/) - A comparison between `TRUNCATE` and `DELETE`. 🚀🚀🚀
---
**Remember:** Always double-check your queries to ensure they're doing exactly what you intend! 💡💡💡
---
**Community Tips:**
- **Use Caution with `DELETE`:** It's powerful but can cause data loss. Double-check the conditions before executing.
- **Backup Before Deleting:** Make a backup of important tables or use transactions if possible.
Happy querying! 🍊💪👨💻👩💻
---
**Tagging:**
#SQL #DeleteStatement #DatabaseManagement #ProgrammingTips #DataIntegrity #BackupsAreKey #CarefulWithDeletes #SQLQueries #TruncateTables #RecordDeletion #DataManipulationLanguage (DML)
#ComputerScience #TechTips 🌐💡✍️💻📊📈💪
---
**Feedback:**
Is there anything you'd like to add or any questions about deleting records in SQL? Share your thoughts below! 💬📖📝💬👩🏫👨🏫🎓🔍🔎📚📖📝💬👩🏫👨🏫🎓🔍🔎📚📖📝💬
---
**Related Articles:**
- [How to Use JOIN in SQL](https://www.example.com/join-in-sql) - Learn about joining tables for more complex queries.
- [Mastering Transactions in SQL](https://www.example.com/transactions-sql) - Understand how transactions can help manage your data.
---
**Community Contribution Request:**
If you have a specific use case or question related to deleting records, feel free to share it here! Let's learn together and improve our SQL skills. 🌟🌟🌟
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David Wilson (daviwil@fosstodon.org)'s status on Wednesday, 02-Apr-2025 15:33:27 JST 
David Wilson
🔴 On today's Crafter Hours stream, we'll continue working on porting over the Discourse Single-Sign On authentication that I implemented in JavaScript for another version of the System Crafters site.
Let's see how things look when we reimplement this in Guile Scheme!
Join us here:
- https://youtube.com/live/OFBCZ1uMBWk
- https://twitch.tv/SystemCrafters -
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David Wilson (daviwil@fosstodon.org)'s status on Monday, 31-Mar-2025 15:25:59 JST
David Wilson
🔴 On today's Crafter Hours stream, I'll show some progress I made on hosting both the emacspackages site and the new Guile-backed System Crafters site on the same Guix server.
I kinda made a mess with it though, so we'll have to find our way out of that, too :)
Join us here:
- https://youtube.com/live/OITQtQnz9X8
- https://twitch.tv/SystemCrafters -
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me (me@social.jlamothe.net)'s status on Saturday, 29-Mar-2025 02:41:20 JST
me
I am in urgent job search mode, so I'm gonna throw this out here and see if anything comes of it.
I am a #Canadian, fluent in both #English and #French. I have experience with several programming languages. My strongest proficiency is with #Haskell and #C. I also have a reasonable grasp of #HTML, #JavaScript, #SQL, #Python, #Lua, #Linux system administration, #bash scripting, #Perl, #AWK, some #Lisp (common, scheme, and emacs), and probably several others I've forgotten to mention.
I am not necessarily looking for something in tech. I just need something stable. I have done everything from software development, to customer support, to factory work, though my current circumstances make in-person work more difficult than remote work. I have been regarded as a hard worker in every job I have ever held.
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David Wilson (daviwil@fosstodon.org)'s status on Wednesday, 19-Mar-2025 16:28:36 JST
David Wilson
🔴 On today's Crafter Hours stream, we'll split out some of the code we've been building for our project into separate Guile libraries so that they can be used in other projects (like the new systemcrafters.net!)
Let's figure out how to ship multiple libraries from a single repository, all packaged using Guix!
Join us here:
- https://youtube.com/live/XFyGylqEz3Q
- https://twitch.tv/SystemCrafters -
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David Wilson (daviwil@fosstodon.org)'s status on Monday, 17-Mar-2025 16:21:17 JST
David Wilson
🔴 On today's Crafter Hours stream, we'll get back to feature development by fleshing out user profiles, allowing users to select which Emacs packages they use, and also making sure we actually have a working user account creation flow.
Let's move things forward!
Join us here:
- https://youtube.com/live/iVAHuVZM9EY
- https://twitch.tv/SystemCrafters -
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David Wilson (daviwil@fosstodon.org)'s status on Monday, 10-Mar-2025 16:36:49 JST
David Wilson
🔴 On today's Crafter Hours stream, we'll first try to figure out how I broke the site 😬 and then clean up some of the work from last Wednesday when we turned the project repo into a Guix channel.
If all goes well, we'll get back to adding new features to make the site ready for the public!
Join us here:
- https://youtube.com/live/cASKPWF95UE
- https://twitch.tv/SystemCrafters -
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Doughnut Lollipop 【記録係】:blobfoxgooglymlem: (tk@bbs.kawa-kun.com)'s status on Saturday, 08-Mar-2025 13:15:20 JST 
Doughnut Lollipop 【記録係】:blobfoxgooglymlem:
How do you all combat data oxidation, the leading cause of bitrot? :blobfoxthinkgoogly: #database #SQL -
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David Wilson (daviwil@fosstodon.org)'s status on Wednesday, 05-Mar-2025 16:26:57 JST
David Wilson
🔴 On today's Crafter Hours stream, we'll continue working on the staging site we deployed last week, this time to initialize the Emacs package repo data so that it can be interacted with!
We'll also start planning out the next steps of the work for the site so that we can move closer to a full production release.
Join us here:
- https://youtube.com/live/oLk4lvLYKBs
- https://twitch.tv/SystemCrafters -
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Abby (abbynormative@mstdn.social)'s status on Wednesday, 05-Mar-2025 09:55:33 JST 
Abby
My workplace is hiring again, this time for a junior data person who can help with csv file cleanup, creating hash files, and filtering contact lists. The role could expand into data analysis and some machine learning if you're interested and have those skills or the ability to learn. Looking for basic competence with #Python and #SQL.
We're an all-remote firm! Looking to hire someone ASAP. We work for Democratic campaigns and non-profits. US-based only, sorry!
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David Wilson (daviwil@fosstodon.org)'s status on Wednesday, 26-Feb-2025 16:37:29 JST
David Wilson
🔴 On today's Crafter Hours stream, we'll finally deploy a staging version of our Guile-based website to a VPS using Guix!
I've already got a VPS on Contabo ready to go for this project, so we'll spend our time setting up a deployment configuration and getting an SSL certificate deployed using certbot.
Join us here:
- https://youtube.com/live/lVzk-yZhJiU
- https://twitch.tv/SystemCrafters -
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David Wilson (daviwil@fosstodon.org)'s status on Monday, 24-Feb-2025 16:30:58 JST
David Wilson
🔴 On today's Crafter Hours stream, we'll be tying up some loose ends before deploying the site to a real server this week!
There are just a few more details that need to be finalized before we can deploy emacspackages.com in a way that won't require breaking changes soon!
Join us here:
- https://youtube.com/live/egbznOiUzYI
- https://twitch.tv/SystemCrafters -
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kreuger458 (kreuger458@mastodon.social)'s status on Wednesday, 19-Feb-2025 17:03:59 JST 
kreuger458
Esta es la lista con los capítulos del tutorial de #PostgreSQL y el lenguaje #SQL:
https://www.youtube.com/watch?v=8_HFyjcUt6Q&list=PLtdeXn2f7ZbNOTrW0POHNuoNbgpc-Qo-6.
Suscríbete a mi canal.
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David Wilson (daviwil@fosstodon.org)'s status on Wednesday, 19-Feb-2025 16:31:13 JST
David Wilson
🔴 On today's Crafter Hours stream, we'll be preparing our Guile website project for deployment via Guix!
The goal will be to produce a working server configuration running in a local container that packages the site and hosts it as a Shepherd service behind an nginx reverse proxy.
We're getting close to having a staging deployment online!
Join us here:
- https://youtube.com/live/G4mnWTcQFWY
- https://twitch.tv/SystemCrafters -
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kreuger458 (kreuger458@mastodon.social)'s status on Tuesday, 18-Feb-2025 17:04:09 JST
kreuger458
Tengo publicado en YouTube un tutorial para la instalación del servidor de base de datos #PostgresQL en una máquina virtual con #Ubuntu.
#Gratis #Free #SiguemeYTeSigo #folloback #FolloMe #Linux #SQL #BBDD
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David Wilson (daviwil@fosstodon.org)'s status on Monday, 17-Feb-2025 16:36:11 JST
David Wilson
🔴 Today we continue hacking on a website from scratch using Guile Scheme!
Since we'll be deploying an early version of the website soon, it's time to work on a solution for ongoing database schema updates after the first deployment is complete.
Let's build a simple framework for applying schema changes over time!
Join us here:
- https://youtube.com/live/oaVFge_bZlM
- https://twitch.tv/SystemCrafters -
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kreuger458 (kreuger458@mastodon.social)'s status on Thursday, 13-Feb-2025 23:13:07 JST
kreuger458
Tengo publicado en YouTube un tutorial para la instalación del servidor de base de datos #PostgresQL en una máquina virtual con #Ubuntu.
#Gratis #Free #SiguemeYTeSigo #folloback #FolloMe #Linux #SQL #BBDD
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David Wilson (daviwil@fosstodon.org)'s status on Wednesday, 12-Feb-2025 16:37:42 JST
David Wilson
🔴 Today we continue hacking on a website from scratch using Guile Scheme!
We'll finish up the work we've been doing on the package tip authoring interface and add a few features to it.
I also want to talk a bit about Datastar in preparation for a video I'll make about it soon!
Join us here:
- https://youtube.com/live/6ZnwyYL-WAo
- https://twitch.tv/SystemCrafters -
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kreuger458 (kreuger458@mastodon.social)'s status on Monday, 10-Feb-2025 17:17:08 JST
kreuger458
He creado un canal en Rumble con las partes del tutorial #PostgreSQL y el lenguaje #SQL:
https://rumble.com/c/c-4781052
Suscríbete a mi canal.
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David Wilson (daviwil@fosstodon.org)'s status on Monday, 10-Feb-2025 16:33:54 JST
David Wilson
🔴 Today we continue hacking on a website from scratch using Guile Scheme!
We'll spend some time implementing sessions for logged in users so that they can start creating content on the site using their accounts.
We'll also take a look at how one might accomplish "middlewares" in Scheme. Spoiler alert: it's just higher-order functions!
Join us here:
- https://youtube.com/live/ZkGszUeigB8
- https://twitch.tv/SystemCrafters
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