XAMPP
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mysqlphpmyadminauthentication数据库管理工具数据库extension
以前开发我一直都是用的appserv,appserv的特点就是一键安装,安装的时候会要求用户输入mysql的root密码。今天我改用xampp作为我的开发环境,所以碰到了修改mysql默认空密码的问题。
我看了下网上所提供的一些帮助信息,搞的那么复杂,其实没必要,我这有简单的做法,其实本质上都是大同小异,下面说下我的方法:
因为安装xampp后的mysql默认密码为空,所以我们能登录到phpmyadmin,在浏览器地址上输入http://localhost/phpmyamdin进入到数据库控制面板,然后选择名称为mysql数据库,如图,可从中看出 user表中,root的两个用户的密码为空。
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我们可以手动编辑上图数据库中的root用户的密码即可。点快速编辑,或者编辑都可以编辑密码,如密码:123456,则填写 “*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9” (引号除外)
编辑后如下图
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如果想把密码改成别的,可以直接执行西面的SQL语句,把new_password改成自己的密码即可:
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另外既然mysql的root用户密码已经修改了,那么phpmyadmin中的对应密码配置也要修改,找到配置文件,如我的是:<br>F:/xampp/phpMyAdmin/config.inc.php<br>找到如下代码
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修改为
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继续修改phpmyadmin本地登陆设置,F:/xampp/phpMyAdmin/config.inc.php<br>$cfg['Servers'][$i]['auth_type'] = 'config';
修改成
$cfg['Servers'][$i]['auth_type']= 'cookie';
InnoDBBufferPool reduces disk I/O by caching data and indexing pages, improving database performance. Its working principle includes: 1. Data reading: Read data from BufferPool; 2. Data writing: After modifying the data, write to BufferPool and refresh it to disk regularly; 3. Cache management: Use the LRU algorithm to manage cache pages; 4. Reading mechanism: Load adjacent data pages in advance. By sizing the BufferPool and using multiple instances, database performance can be optimized.

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

MySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA


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