1. Uninstall MySQL under Windows system
Open "Computer" - "Control Panel" - "Programs" - "Programs and Features" " option.
Find the MySQL program, click on it, and select the "Uninstall" option.
MySQL configuration files and data files can be deleted in the pop-up uninstall window. If you wish to reinstall MySQL, you can keep these files.
After the uninstallation is complete, please open the MySQL installation path in the file browser and manually delete other related files and folders. C:\Program Files\MySQL and the subdirectories it contains can be deleted if MySQL is installed under this path.
2. Installation of MySQL under Windows system
First, download the MySQL installation program suitable for your system version from the MySQL official website.
Double-click the downloaded installation program and follow the prompts to complete the MySQL installation process.
During the installation process, you can choose to set the MySQL port number, installation path, root user password and other information.
After the installation is complete, open the Windows service list and you will find that the MySQL service is already running. If the MySQL service is not started, you can start it manually.
You can find the command line tool mysql.exe by searching in the MySQL installation path. MySQL databases can be created, managed and maintained using mysql.exe.
3. Uninstall MySQL under Linux system
Open the Linux terminal and use the following command to uninstall MySQL: sudo apt-get remove mysql-server
When uninstalling MySQL, the system will automatically ask whether to delete the MySQL configuration file. Choose whether to delete it based on your own situation.
After uninstallation is complete, use the following command to delete the MySQL data directory: sudo rm -rf /var/lib/mysql/
Deletion process , please make sure you back up important files in the MySQL data directory.
4. Installation of MySQL under Linux system
In Linux system, the version and installation method of MySQL may be different. The following are simple steps to install MySQL in Ubuntu system:
Open a Linux terminal and use the following command to install MySQL: sudo apt-get install mysql-server
During the installation process, the system will ask you to set the root password of MySQL. Please keep it properly.
After the installation is complete, use the following command to check whether the MySQL service is running: systemctl status mysql
To enter the command line mode of MySQL, just enter Enter the "mysql" command in the terminal. SQL statements can be used to create, manage and maintain MySQL databases.
The above is the detailed content of What is the method to uninstall and install mysql?. For more information, please follow other related articles on the PHP Chinese website!
Explain the ACID properties (Atomicity, Consistency, Isolation, Durability).Apr 16, 2025 am 12:20 AMACID attributes include atomicity, consistency, isolation and durability, and are the cornerstone of database design. 1. Atomicity ensures that the transaction is either completely successful or completely failed. 2. Consistency ensures that the database remains consistent before and after a transaction. 3. Isolation ensures that transactions do not interfere with each other. 4. Persistence ensures that data is permanently saved after transaction submission.
MySQL: Database Management System vs. Programming LanguageApr 16, 2025 am 12:19 AMMySQL is not only a database management system (DBMS) but also closely related to programming languages. 1) As a DBMS, MySQL is used to store, organize and retrieve data, and optimizing indexes can improve query performance. 2) Combining SQL with programming languages, embedded in Python, using ORM tools such as SQLAlchemy can simplify operations. 3) Performance optimization includes indexing, querying, caching, library and table division and transaction management.
MySQL: Managing Data with SQL CommandsApr 16, 2025 am 12:19 AMMySQL uses SQL commands to manage data. 1. Basic commands include SELECT, INSERT, UPDATE and DELETE. 2. Advanced usage involves JOIN, subquery and aggregate functions. 3. Common errors include syntax, logic and performance issues. 4. Optimization tips include using indexes, avoiding SELECT* and using LIMIT.
MySQL's Purpose: Storing and Managing Data EffectivelyApr 16, 2025 am 12:16 AMMySQL is an efficient relational database management system suitable for storing and managing data. Its advantages include high-performance queries, flexible transaction processing and rich data types. In practical applications, MySQL is often used in e-commerce platforms, social networks and content management systems, but attention should be paid to performance optimization, data security and scalability.
SQL and MySQL: Understanding the RelationshipApr 16, 2025 am 12:14 AMThe relationship between SQL and MySQL is the relationship between standard languages and specific implementations. 1.SQL is a standard language used to manage and operate relational databases, allowing data addition, deletion, modification and query. 2.MySQL is a specific database management system that uses SQL as its operating language and provides efficient data storage and management.
Explain the role of InnoDB redo logs and undo logs.Apr 15, 2025 am 12:16 AMInnoDB uses redologs and undologs to ensure data consistency and reliability. 1.redologs record data page modification to ensure crash recovery and transaction persistence. 2.undologs records the original data value and supports transaction rollback and MVCC.
What are the key metrics to look for in an EXPLAIN output (type, key, rows, Extra)?Apr 15, 2025 am 12:15 AMKey metrics for EXPLAIN commands include type, key, rows, and Extra. 1) The type reflects the access type of the query. The higher the value, the higher the efficiency, such as const is better than ALL. 2) The key displays the index used, and NULL indicates no index. 3) rows estimates the number of scanned rows, affecting query performance. 4) Extra provides additional information, such as Usingfilesort prompts that it needs to be optimized.
What is the Using temporary status in EXPLAIN and how to avoid it?Apr 15, 2025 am 12:14 AMUsingtemporary indicates that the need to create temporary tables in MySQL queries, which are commonly found in ORDERBY using DISTINCT, GROUPBY, or non-indexed columns. You can avoid the occurrence of indexes and rewrite queries and improve query performance. Specifically, when Usingtemporary appears in EXPLAIN output, it means that MySQL needs to create temporary tables to handle queries. This usually occurs when: 1) deduplication or grouping when using DISTINCT or GROUPBY; 2) sort when ORDERBY contains non-index columns; 3) use complex subquery or join operations. Optimization methods include: 1) ORDERBY and GROUPB
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
SublimeText3 Linux new version
SublimeText3 Linux latest version
Atom editor mac version download
The most popular open source editor
SublimeText3 Chinese version
Chinese version, very easy to use
