Course Introduction：This article presents a method to retrieve a hierarchical representation of categories and sub-categories from a MySQL database using PHP. The adjacency list model and a PHP script are utilized to construct a nested HTML unordered list (UL) that mirr
2024-10-24 comment 0 419
Course Introduction：Optimizing database schema design in MySQL can improve performance through the following steps: 1. Index optimization: Create indexes on common query columns, balancing the overhead of query and inserting updates. 2. Table structure optimization: Reduce data redundancy through normalization or anti-normalization and improve access efficiency. 3. Data type selection: Use appropriate data types, such as INT instead of VARCHAR, to reduce storage space. 4. Partitioning and sub-table: For large data volumes, use partitioning and sub-table to disperse data to improve query and maintenance efficiency.
2025-04-30 comment 0 776
Course Introduction：Retrieving Images from MySQL Database and Displaying in an HTML Image TagQuestion:In PHP, you've created a MySQL database with a table that...
2024-12-14 comment 0 852
Course Introduction：MySQL database cost optimization mainly revolves around resource utilization and performance efficiency. 1. Reasonably select cloud service packages, select appropriate configurations by monitoring load conditions, give priority to memory instances and use reserved instances to save costs; 2. Optimize query and index design, avoid SELECT*, reasonably use combined indexes, and regularly analyze slow query logs; 3. Implement data archiving and database sub-table strategies, move cold data to low-cost storage, and perform horizontal sub-tables to reduce single-node pressure if necessary; 4. Use cache to reduce database pressure, cache hotspot data through Redis, reduce the number of connections and requests, and improve system stability. Continuous observation and gradual adjustment are the key to achieving long-term cost control.
2025-07-26 comment 0 732
Course Introduction：Combining Multiple Table Searches in PHP with MySQL and a KeywordYou have a database with three tables: messages, topics, and comments. Each table...
2024-11-12 comment 0 1058
Course Elementary 13824
Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.
Course Elementary 82359
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).
Course Elementary 13178
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.
Course Elementary 24628
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.
Course Elementary 27486
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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