1. Code Specifications In practical applications, following good code specifications is very important, as it can improve the readability, maintainability, and scalability of the code. For example, class names use…
1. Basic Syntax and Data Types Java’s basic syntax is a frequent topic in interviews, including identifiers, keywords, operators, control statements, etc. In terms of data types, it is necessary…
1. Overview of Join Algorithms MySQL relies on three core algorithms to execute join queries: 1.1 Nested-Loop Join Basic principle: Use the left table as the driving table, iterate through…
What are Transaction Isolation Levels? When multiple transactions are executed concurrently, problems may arise if they are not isolated. These include dirty reads, non-repeatable reads, and phantom reads. Transaction isolation…
I. Introduction Currently, MySQL mainly has the following index types: II. Statements III. Index Types 1. Normal Index It is the most basic index with no restrictions. It can be…
I. MySQL Connection & Disconnection 1. Connect to Local Database 2. Connect to Remote Database 3. Exit Database II. Database Operations 1. View All Databases 2. Create Database 3. Switch…
HTTP The complete HTTP request flow can be divided into the following steps: When a client (usually a browser) enters a URL (such as https://www.example.com), it first needs to resolve…
When browsing websites daily, we often see two protocol prefixes in URLs: “http” and “https”. Although they seem similar, they have significant differences in terms of security and data transmission.…
一、Overview of Local Storage 1. What is Local Storage? Local storage refers to a way of storing data in the user’s browser. It allows web applications to save small amounts…
Cookie data is stored in the client’s browser, while session data is stored on the server. Cookies are not very secure. Others can analyze the cookies stored locally and carry…
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