Course Intermediate  3405

Course Introduction：This set of courses is based on the design concept and data structure of MySQL index, index usage scenarios, index classification, index usage scenarios, index performance analysis, query optimization, slow query of MySQL index, etc. It mainly describes the solution of MySQL index optimization. It is very suitable for students who have basic knowledge of MySQL or have certain work experience. The course explains how to solve the problem of slow large-volume queries, how to write an efficient SQL, how to optimize query statements, what is the implementation principle of indexes, how to optimize indexes... and many other difficulties and interview points in SQL index optimization.

Course Elementary  12665

Course Introduction："AJAX Cross-Domain Solution: JSONP Video Tutorial" The core of ajax is the JavaScript object XmlHttpRequest. This object was first introduced in Internet Explorer 5 and is a technology that supports asynchronous requests. This video introduces the ajax cross-domain solution.

Course Intermediate  8003

Course Introduction：Caching is a core component of current enterprise-level applications. Today's mainstream e-commerce, life services, live broadcast and other fields are inseparable from the use of cache. As the current mainstream caching technology, Redis has become the first choice for Internet companies. The cache structure design based on redis cluster currently accounts for half of the market in the same field.

Course Introduction：How to Extract the Exposure Scheme of a Photo Using PHP and Exif Extensions Photography is an art, and understanding the exposure of a photo is very important for photographers. In the age of digital photography, each photo contains information about exposure in its metadata, which includes parameters such as shutter speed, aperture, and ISO. In this article, we will learn how to use PHP and the Exif extension to extract and parse the exposure scheme of a photo. First, we need to make sure the Exif extension is enabled in PHP. By canceling in php.ini file

2023-07-28 comment 0  1286

Course Introduction：As a leading lifestyle sharing platform in China, Xiaohongshu’s topic page is an important channel for users to obtain information and participate in discussions. For content creators, understanding the exposure of topic pages is an important criterion for measuring the influence of content. This article will explain to you how to count the exposure of Xiaohongshu topic pages, and discuss how to increase the exposure of topics. 1. How to count the exposure of Xiaohongshu topic pages? Currently, there is no official direct way to measure the exposure of Xiaohongshu topic pages. However, we can estimate the exposure of the topic page through the following methods: 1. The number of users who follow the topic page: You can check the number of users who follow the topic through the "Follow" button on the topic page. The more people follow, generally speaking, the exposure of the topic page will increase accordingly. 2. Under the topic page

2024-07-10 comment 0  610

Course Introduction：The iPhone 16 has not yet been released, but the latest news about the iPhone 17 is emerging. Recently, the iPhone 17 major revision has been exposed, and real pictures have been revealed. The cool body design is stunning and should not be missed by interested friends. iPhone 17 Appearance Exposed Foreign media recently exposed a set of iPhone 17 concept designs, which are stunning. It uses three horizontal cameras, similar to the shape of Google Pixel mobile phones, and the screen is similar to the one previously exposed. It implements under-screen 3D face recognition and shrinks the capsule shape. If next year’s new iPhone turns out to be exactly as shown in the design drawings, one can’t help but feel that Apple is lacking in sincerity. The appearance of Apple mobile phones in the past few years is basically

2024-06-27 comment 0  687