How to sum multiple columns of data from multiple tables in mysql?

I have 4 tables: 1 - Supplier ID_A Supplier Name 1 Apple 2 Xiaomi 3 Nokia 4 OPPO 2 - Starting Balance ID_B Starting Balance 1100021000310004 Empty 3 - Invoice ID_C Invoice Value 120015002800325034004 Empty 4 - Return ID_DReturn_value11002502253 Empty 4 Empty Arithmetic for displaying data Method: St...

P粉615886660 2023-09-11 15:48:19 0 1 195

I want to build a website. If there are 100 pages, do each page need to be adjusted like this?

Teacher, I am watching your Xiaomi Mall recording. I have a question. I want to build a website. If there are 100 pages, do each page need to be adjusted like this?

谭振威 2022-11-30 22:59:04 0 1 606

PHP CURL calling interface 500

As shown in the picture, a novice imitates Xiaomi Mall but encounters a problem and cannot find the answer. As shown in the figure, a novice imitates Xiaomi Mall but encounters a problem and cannot find the answer. As shown in the figure, a novice imitates Xiaomi Mall but encounters a problem and ca...

PHP中文网用户-7094539 2022-10-25 18:35:54 0 1 295

Is this element collapse or element overflow?

As shown in the picture, a newbie imitates Xiaomi Mall but encounters a problem and cannot find the answer.

。 2022-10-22 21:32:37 0 0 392

php adds human-machine verification code

Guys, how can I add a human-machine verification code to the PHP source code (Mituo website building)? Please answer it, thank you! (There are a total of three platform verification codes, I hope you can tell me about them all, thank you) 1. Luosimao https://luosimao.com/docs/api/56 2. Tencent https...

Microsoft-Windows 2020-10-22 16:47:44 0 1 1099

What is the common reason why content_shop cannot be displayed on the browser? The code is the same as yours

朱 2019-07-22 13:17:41 0 1 1246

I follow the Xiaomi flash sale and the picture is not displayed. What should I do?

I follow the Xiaomi flash sale and the picture is not displayed. What should I do?

小青年 2019-06-04 16:18:38 0 0 992

PHP upgrade of phpstudy under Linux

Dear masters, my server has set up the Linux version of phpstudy, but the PHP version can only go to 5.6. How to upgrade php to php7.2 in the phpstudy environment? Please give me some advice! ! /////I insist on 100 words. Please ignore the following garbled text. Downstairs, He Pei broke the drum an...

珺宝科技-周羡斌 2019-04-07 20:20:25 0 2 716

Xiaobai is asking for advice on the demo of multicast.

Dear friends, does anyone have a demo about UDP multicast? Can you send it to me? I was studying Ximen Daguanren's course @西门大官人 recently, and suddenly I thought that I still have a Xiaomi air-conditioning companion at home that supports LAN communication protocols. I was thinking about using my sem...

奋斗 2018-12-17 17:40:23 0 0 754

Where can I download the text, pictures and other files of this courseware?

Xiaomi Mall static web page

Taky 2018-12-02 16:27:04 0 0 933

Hello, Mr. Miejieshitai: Is there any content in 1-6 that has been deleted?

Speaking of 1-6 Xiaomi Mall sidebar navigation and drop-down box construction, the connection failed around 29:07, and an already set

TM.Rui 2018-10-24 22:14:13 0 2 1057

PHP Chinese website large-scale live broadcast public welfare free class registration post. . .

PHP Chinese website’s free public welfare live broadcast class in June is facing 6.18. Instead of frantically buying your hands, it is better to study quietly. We have carefully prepared two free live broadcast courses for you: 1. One-week introduction to Web front-end development 1. Course name: [X...

PHP中文网 2018-06-04 13:03:08 32 848 56229

I know how to cut pictures on the front end and want to learn PHP website development. I would like to ask for a complete class video of the physical class of a first-line PHP institution in Beijing.

I know how to cut pictures on the front end and want to learn PHP website development. I would like to ask for a complete class video of the physical class of a first-line PHP institution in Beijing. I learned front-end cutting at an institution before, and then became a cutter, but I didn’t have mu...

. 2017-08-28 14:28:41 0 1 1049

javascript - uc, qq, and sogou. The above three mobile browsers determine that the js code on the mobile terminal is not executed.

For example, I wrote a piece of code to judge whether the mobile terminal will jump, but it will not be executed on the mobile terminals of uc, qq, and Sogou. However, the mobile browsers of chrome, Xiaomi, and WeChat can execute {code...}

巴扎黑 2017-07-05 10:50:27 0 4 2342

javascript - Uncaught ReferenceError: addRow is not defined at fil

[MUI - APP error] {Code...} As shown in the figure ↑ About addRow addRow is not defined by me, and even all my frameworks do not have this method: Regarding the environment running locally, Hbuilder development tools, MUI framework, android phone ( Xiaomi 4) Debugging

学习ing 2017-06-28 09:27:17 0 1 811

javascript - The live event in jQuery has no effect on the mobile WeChat client; the code is as follows

This code works well on PC and some Android phones, but it has no effect when clicked on some Xiaomi phones (the running environment is in the WeChat subscription account)

PHP中文网 2017-06-28 09:25:53 0 3 556

Python novice asks questions about attributes in classes

The code is as follows: {code...} Running results: My question: The system prompts: return ("The owner of the house is: %s, the area is: %d square meters, the address is: %s, and the house type is: %s." %(self.name,self.area,self.addr,self.info)) She said that the attribute name cannot be ...

欧阳克 2017-06-15 09:21:38 0 1 542

javascript - QQ browser and uc browser do not support css3 animation, but the built-in browsers of qq and WeChat support it

A very simple effect, the drop-down list arrow rotates. The code has no problem opening in the built-in browsers of QQ and WeChat, and the native browser of the mobile phone (Xiaomi 5splus) has no problem, but the QQ browser and UC will not open.

ringa_lee 2017-06-12 09:32:38 0 1 670

javascript - On the same web page, input type = "file", Apple iOS does not pop up to select a file, but Android can, how can I break it?

Open the same webpage in the WeChat browser, input type = "file", Apple ios cannot select the file to upload, Apple does not pop up the file selection directly, Android can, how can I solve the problem? {Code...} Android is normal, for example, Xiaomi is like this: But Apple is not, Apple ...

習慣沉默 2017-06-12 09:27:02 0 3 848

php - Xiaomi router, under the same LAN, how can a mobile phone and a computer access local services opened through xampp on the computer through the computer's IP address at the same time?

Question: I want to use a mobile phone and a computer to access local services opened on the computer through the computer IP address at the same time. Because I am a front-end, I need to adapt the page to the mobile terminal. Prerequisite: The computer and mobile phone are in the same wireless netw...

怪我咯 2017-06-05 11:07:48 0 1 567