CourseIntermediate3157

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.

CourseElementary12396

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.

CourseIntermediate7735

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.

CourseAdvanced42996

Course Introduction：This set of courses is an advanced course, including: query optimization and performance analysis of MySQL single table with tens of millions of data, mySQL master-slave principle and its application in high-concurrency systems, integration and use of Elasticsearch and PHP (Laravel), high concurrency The difference between system code and ordinary system code architecture and analysis of concerns, etc.

CourseElementary54145

Course Introduction："HTML5 From Beginner to Mastery Tutorial" introduces in detail that HTML5 has added a lot of new content based on HTML, with more functions and more dazzling effects.

Course Introduction：Morning treadmills are the new favorite of modern people for fitness. In addition to the functions of traditional treadmills, they can also be connected to mobile APPs through communication functions to monitor and record exercise data in real time and provide personalized exercise plans. However, as the number of users continues to increase, some users have begun to report that morning treadmills have communication failures. This article will introduce you to some practical tips for solving morning treadmill communication failures to help you solve this problem smoothly. Check whether the connection cable is loose. Troubleshoot communication faults caused by loose connection cables by checking whether the connection cable is securely connected. Check whether the mobile APP version has expired and update the mobile APP version promptly to ensure compatibility and stability with the morning treadmill. Treadmill and Cell Phone Communication Troubleshooting Guide to Restart Running

2024-08-07 comment 0297

Course Introduction：As a high-quality Android simulation software, Thunder and Lightning Simulator is used by many users. However, recently some friends have experienced a blue screen failure when opening the computer when opening the Thunder and Lightning Simulator, resulting in the inability to use it normally. So what should this problem be? How to solve it? In this software tutorial, the editor will share three solutions, hoping to help the majority of users. The solution is as follows: Method 1: 1. Click the search button on the right side of the taskbar. 2. Search for and open Enable or turn off Windows features. 3. Cancel the Hyper-V function and click OK to save. Method 2: 1. Same as above, use search and open the Security Center. 2. Enter device security and open the kernel isolation details. 3. Check the box to turn off the kernel.

2024-08-29 comment 0291

Course Introduction：Win10 system has a very good automatic fault repair function, and will record historical repair problems. So how to check the recommended troubleshooting history of Win10 system? For this reason, System House brings you detailed troubleshooting history viewing methods recommended for Win10 systems, where you can more conveniently obtain the information you want. Recommended troubleshooting history viewing method for Win10 system 1. First, we need to open the computer’s settings function. 2. Then find the "Update & Security" function in the settings and click to enter. 3. After entering, there will be a troubleshooting option, click here to enter. 4. Then under the "Recommended Troubleshooting" option, select the "View History" option

2024-09-05 comment 0639

Course Introduction：In modern society, mobile phones have become an indispensable communication tool in people's lives. However, sometimes we may encounter the problem of a black screen on our mobile phone, which is not only annoying, but may also affect our daily use. This article will explore the causes of black screen on mobile phones and provide solutions to help readers effectively deal with this problem. 1. Mobile phone black screen caused by hardware problems 1.1 Battery problem: Battery exhaustion or battery abnormality will cause the mobile phone to be unable to start, resulting in a black screen. 1.2 Display failure: Problems such as damage to the mobile phone display or loose connection cables may cause the phone to have a black screen. 1.3 Other hardware failures: such as motherboard failure, touch screen failure, etc. may cause the mobile phone to be unable to display properly. 2. Black screen of mobile phone caused by software problems 2.1 System crash: System crash

2024-09-02 comment 0515