Course Intermediate  11432

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Course Advanced  17725

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Course Advanced  11422

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

Course Introduction：As the amount of data increases and business needs increase, database performance optimization has become a challenge that many enterprises must face. The most important part is to optimize the query performance of the database. As one of the most popular relational databases currently, MySQL's query optimizer is very critical to improving query performance. MySQL's query optimizer is a very advanced system component. Its main function is to provide the best query plan for the database optimizer to achieve optimal query performance. In MySQL, the optimizer is responsible for the following

2023-06-14 comment 0  907

Course Introduction：In PHP development, SQL query operations are very common. However, as the data in the database continues to grow, query operations will become more and more time-consuming, which will affect the performance and response speed of the system. Therefore, optimization is essential when performing SQL query operations. This article will introduce you to how to optimize SQL query operations in PHP development. 1. Avoid using "SELECT*" "SELECT*" statements to query all columns in the table. However, doing so will make the query and returned results very large, which may

2023-06-25 comment 0  789

Course Introduction：Overview of how to use MySQL's paging query to optimize query operations with large amounts of data: When processing query operations with large amounts of data, paging queries are a common requirement. MySQL provides LIMIT and OFFSET keywords to implement paging queries. However, when the amount of data is large, this simple paged query can become slow and resource-consuming. This article will introduce how to use MySQL's paging query to optimize large data query operations, and provide code examples. Using indexes Indexes are an important factor in speeding up queries. Executing paging query

2023-08-02 comment 0  1040

Course Introduction：How to realize MySQL underlying optimization: The working principle and tuning method of the query optimizer. In database applications, query optimization is one of the important means to improve database performance. As a commonly used relational database management system, MySQL’s query optimizer’s working principle and tuning method are very important. This article will introduce how the MySQL query optimizer works and provide some specific code examples. 1. Working Principle of MySQL Query Optimizer Query Parsing Phase The work of the query optimizer begins in the query parsing phase. MySQ

2023-11-08 comment 0  1047

Course Introduction：Optimization methods for paging queries: 1. Subquery optimization, performance improvement can be achieved by rewriting paging SQL statements into subqueries. 2. ID limitation optimization, you can calculate the range of queried IDs based on the number of queried pages and the number of queried records, and then query based on the "id between and" statement. 3. Optimize based on index reordering, find relevant data addresses through the index, and avoid full table scans. 4. For delayed association optimization, you can use JOIN to first complete the paging operation on the index column, and then return to the table to obtain the required columns.

2022-06-20 comment 0  3565