Can anyone find the error in this MySQL code? (Beginner)

I'm thinking about a MySQL job benchmark and trying to create a data called students. However, I removed the error message Operationfailed: An error occurred while applying SQL script to the database

P粉469090753 2023-07-24 17:17:03 0  1  427

javascript - Repeated calls to vue components

Now I use Vue to write projects. There are many pages, many of which have a delete confirmation box. Can I write this delete box as a component and call it every time, but the data inside changes? Communication between sibling components will be used, but how can the delete button on different pages...

漂亮男人 2017-06-28 09:29:12 0  2  1396

Dear masters, how to write the PHP interface?

Dear masters, how to write the add, delete, modify and query interface of PHP+mysql? I really don’t know how to do it. Ask for advice

Cloud. 2020-03-11 11:17:43 0  5  1262

If a row is deleted, trigger inserting it into another table

I'm trying to create a trigger that copies a deleted row to another table. So far when I delete a row I just copy the entire first table into the second table which isn't very useful. Table 1 is the comment with comment_id, file_id, user_id, comment_text, comment_datetime and parent. Table 2 is comm...

P粉741223880 2024-02-21 15:22:36 0  1  374

php73+tp6+think-swoole3.0+sdebug+cannot start the service

Environment: Remove the sdebug environment for normal operation: Set up sdebug, unable to start swoole, stuck there, no information printed in the log file. Also: sdebug2.9.3, sdebug2.6 permutation and combination php72, php73, php74 all failed.

疯狂的石头 2021-03-29 06:01:47 0  0  1081

Preview of teaching courses on September 14, 2018: Common DOM operations and practical cases

1. Teaching topic: Common DOM operations: Document Object Model (DOM, Document Object Model) is mainly used to operate the content of HTML and XML documents. DOM depicts a hierarchical node tree. By operating on nodes, functions such as adding, deleting, modifying, and searching document content can...

藏色散人 2018-09-14 10:52:17 0  0  1270

Make a button in html delete a row in MySql

I'm currently working on a project where I'm using nodejs to create a user, add the user to MySql in a table called "users" I want to create a button in html that deletes the currently logged in user from the mysql table how can I make Button in html calls function in nodejs to delete row ...

P粉760675452 2024-04-01 13:24:27 0  1  446

Title: JavaScript to remove latest child element by ID has limited effect

I'm making a dynamic list where the user can click a button to remove an input. When a new input is created, I assign an ID to the child element using a counter that is incremented by 1 each time a new input is generated. However, when I try to delete an input by ID, it seems that only the most rece...

P粉914731066 2024-01-16 18:06:37 0  2  518

github - How to delete the branch of the remote warehouse in git

I created a branch locally and pushed it to github without merging it. Then I deleted the branch locally. How do I delete the branch on the remote repository?

给我你的怀抱 2017-06-14 10:54:48 0  2  879

How does the online book management system allow users to find and operate their own data tables based on usernames?

For example, in an online book management system, if users perform addition, deletion, modification, and search operations, how can the user generate a data table of his own for each addition, deletion, modification, and search operation after successfully registering? How can the user find the corr...

phpcn_u30422 2018-08-23 22:16:49 1  1  1544

javascript - A js exercise question, why the last getElementsByTagName('a')[0] here is 0

{Code...} The effect of this implementation is the effect of adding and deleting the last column in a table. I don’t understand why oTd.getElementsByTagName('a')[0].onclick after createElement creates the a tag adding and deleting function. =function() The TagName selected here is [0], no...

女神的闺蜜爱上我 2017-06-26 10:57:27 0  4  870

Unable to populate my request body to test registration functionality using Postman *FIXED*

I'm developing a very simple social media application where users can register, log in, create posts, edit their profile and posts, delete posts, and delete themselves completely. The token via jwt should be created and used appropriately and the user uploads all relevant files to cloudinary. Where ...

P粉166675898 2024-04-01 10:09:37 0  1  516

Can't create new site

After creating a new site, Nginx stops and the site cannot be accessed. After deleting this new site, the default site can be accessed again. Apache has been unable to start. Error AH00526: Syntax error on line 258 of D:/Program Files/Extensions/Apache2.4.39/conf/httpd.conf:DocumentRoot takes one ar...

P粉911039575 2022-06-12 18:44:10 0  1  1880

php - laravel File::delete fails to delete files

After the file was uploaded successfully, I downloaded it to the local computer, read the content and performed a series of database operations, and then deleted the file, but the deletion failed. And if you delete it immediately next time you come in, the deletion will be successful. {code...}

曾经蜡笔没有小新 2017-05-24 11:33:41 0  1  877

linux - How to batch delete keys of a specific pattern under Redis

Redis can find the keys of a specified pattern: {code...} But how to delete the keys of a specific pattern during the delete operation?

过去多啦不再A梦 2017-06-29 10:09:05 0  2  1382

javascript - How to delete a package that has been published in npm?

npm unpublish npm unpublish --force //Force deletion, but it seems that it is not actually deleted! ! ! npm unpublish guitest@1.0.1 //Specify the version number, but it doesn't seem to be deleted. Clear the cache first: npm cache clean is useless. After the above operations, my npm...

为情所困 2017-05-18 11:03:04 0  2  865

CSS: Remove drop shadow from div inside Vuetify dialog with drop shadow

I have a dialog with a triangle added using CSS on a div. But the CSS trick is that part of the border is transparent. The problem I'm trying to overcome is removing the shadow from the transparent border without removing the shadow from the dialog itself. Adding this to the div doesn't work: box-sh...

P粉826429907 2023-09-13 19:57:28 0  1  618

PHP manages MySQL database

What knowledge points do you need to learn to use PHP to implement operations such as adding, deleting, modifying, and querying MySQL?

长江 2018-08-21 08:26:22 0  0  1070

Laravel deletes a record. The record can only be deleted by its owner. How should the `destroy()` method be added?

For example, if an article is to be deleted, only the creator of this article can delete it. How should the destroy() method be added below? {code...}

阿神 2017-05-16 16:49:51 0  1  425

Workaround: How to resolve Unable to delete or update parent row: Foreign key constraint violated?

I want to delete users based on phone number. So I made a custom query to delete that specific user. But an error occurred that the foreign key could not be deleted or updated. Below is my user entity. Below is my custom query trying to delete a user. @Modifying@Query("DELETEfromUseruwhereu.pho...

P粉458913655 2024-03-25 18:47:47 0  1  636