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Course Elementary 13285

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

CSS Online Manual

Course Elementary 81719

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

SVG Tutorial

Course Elementary 12765

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.

AngularJS Chinese Reference Manual

Course Elementary 24211

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

Go language tutorial manual

Course Elementary 27000

Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.

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php - How to write mysql to set the field sales to numeric quantity when it is null, otherwise set sales to the original sales+quantity?

There is an int type field sales in the item table. How to use SQL to update the sales volume? When the sales field is null, set it to the numerical quantity. Otherwise, set sales to the original sales+quantity?

2017-05-16 13:00:43

How to conditionally get price*quantity using CASE

If I have sale_price, I will use sale_price*quantity to express the total price. If you don't have sale_price, you need to use Price_origin*quantity to express the total price. I try to use CASE as below but I get this error. Error 1064 (42000): There is an error in your SQL syntax; check the manual that corresponds to your MySQL server version for '))ASproductsFROMusersuJOINcart_orderc_oONc_o.us on line 11

2024-04-03 20:45:07

Change input quantity step value of simple product based on weight in WooCommerce

I want the quantity selector value to change based on the weight we set in Shipping > Product Weight for a simple product. As shown in the image below, when we set the weight of the product to 0.5 kg, the product quantity selector starts from 0.5 and if we set it to 1 kg, it starts from 1. Finally when we set the weight to each number, the quantity selector should fire based on the weight number we defined. I modified the code but it doesn't work for values less than 1. /*QuantitySelectorBasedOnSimple*/functioncu

2023-09-04 21:55:45

Undefined array key 'quantity' appears in C:\xampp\htdocs\login\cart-item.php

I am following the tutorial video but there is no output table in the database. I followed every step in the video. I also tried initializing the quantity to a variable but it still doesn't work <?phpsession_start();$connect=mysqli_connect("localhost","root","","login_sample_db");if(isset($

2023-09-05 20:18:59

vue.js - Shopping cart written in laravel and vuejs, updating quantity, using vue-resource to send ajax request problem

Shopping cart written in laravel and vuejs, update quantity, use vue-resource to send ajax request problem demo: https://jsfiddle.net/LvL6pu3q/3/ Demo description: The content in the items[] array of vuejs code is for the convenience of demonstration , filled in some data, actually from the database...

2017-05-16 16:51:13

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thinkphp count cannot get the quantity when used in group

Course Introduction：{code...} cannot get the quantity {code...} can get the data

2016-07-06 comment 0 1864

How Can a Recursive Stored Procedure in MySQL Calculate Quantity Hierarchy?

Course Introduction：Recursive Stored Procedure for Computing Quantity HierarchyIn situations like the one presented, where hierarchical calculations are required, a...

2024-10-31 comment 0 448

How to Reduce Pooled Lot Quantity Using SQL Recursive CTE?

Course Introduction：Reducing Pooled Lot Quantity with Depleting Values from Consumption TableIn SQL 2005, you can utilize a recursive Common Table Expression (CTE) to...

2025-01-10 comment 0 522

How to Implement a Recursive Stored Procedure in MySQL for Calculating Quantity Hierarchy?

Course Introduction：Recursive Stored Procedure for Calculating Quantity HierarchyIn MySQL, creating a recursive stored procedure to compute quantities for nested...

2024-10-31 comment 0 566

How to Retrieve Column Names and Quantity from SQL Queries in MySQL with Python?

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