MySql使用全记录4
设置MySql的root用户口令 本文由CSDN- 蚍蜉撼青松 【主页: http://blog.csdn.net/howeverpf 参考链接 : http://wenku.baidu.com/view/73ab05737fd5360cba1adb08.html 安装好MySql服务以后,默认已有root用户,其默认密码为空,此时不使用口令即可登入。出
设置MySql的root用户口令
本文由CSDN-蚍蜉撼青松【主页:http://blog.csdn.net/howeverpf
参考链接:http://wenku.baidu.com/view/73ab05737fd5360cba1adb08.html
安装好MySql服务以后,默认已有root用户,其默认密码为空,此时不使用口令即可登入。出于安全性考虑,我们需要设置数据库用户root的登录密码。
1.使用grant语句
使用root和空密码进入mysql提示符,输入如下:
mysql>grant all on *.* to 'root'@'localhost' IDENTIFIED BY '新口令' with grant option;
2.使用set password命令
使用root和空密码进入mysql提示符,输入如下:
mysql>set password for 'root'@'localhost'= password('新口令');
命令的格式为,SET PASSWORD FOR '用户名'@'主机名' = PASSWORD('口令'); 若要允许远程登录,则主机名写为%
3.进入mysql库修改user表
使用root和空密码进入mysql提示符,输入如下:
mysql>use mysql; mysql>update user set password = password('新口令') where user = 'root'; mysql>flush privileges;
4.使用mysqladmin
前提上是安装完毕后,去MySQL的bin目录下,看是否存在mysqladmin.exe这个可执行文件,有则可用此方法,木有就算了。(我在Win7上用wamp装的就没这工具)
在mysqladmin.exe所在的目录下打开命令提示符(摁住shift后点鼠标右键),输入:
mysqladmin -uroot -p password 新口令 Enter password: **** //刚安装后为空,直接回车即可
------本文由CSDN-蚍蜉撼青松【主页:http://blog.csdn.net/howeverpf------

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

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



MySQL is an open source relational database management system. 1) Create database and tables: Use the CREATEDATABASE and CREATETABLE commands. 2) Basic operations: INSERT, UPDATE, DELETE and SELECT. 3) Advanced operations: JOIN, subquery and transaction processing. 4) Debugging skills: Check syntax, data type and permissions. 5) Optimization suggestions: Use indexes, avoid SELECT* and use transactions.

You can open phpMyAdmin through the following steps: 1. Log in to the website control panel; 2. Find and click the phpMyAdmin icon; 3. Enter MySQL credentials; 4. Click "Login".

Create a database using Navicat Premium: Connect to the database server and enter the connection parameters. Right-click on the server and select Create Database. Enter the name of the new database and the specified character set and collation. Connect to the new database and create the table in the Object Browser. Right-click on the table and select Insert Data to insert the data.

You can create a new MySQL connection in Navicat by following the steps: Open the application and select New Connection (Ctrl N). Select "MySQL" as the connection type. Enter the hostname/IP address, port, username, and password. (Optional) Configure advanced options. Save the connection and enter the connection name.

MySQL and SQL are essential skills for developers. 1.MySQL is an open source relational database management system, and SQL is the standard language used to manage and operate databases. 2.MySQL supports multiple storage engines through efficient data storage and retrieval functions, and SQL completes complex data operations through simple statements. 3. Examples of usage include basic queries and advanced queries, such as filtering and sorting by condition. 4. Common errors include syntax errors and performance issues, which can be optimized by checking SQL statements and using EXPLAIN commands. 5. Performance optimization techniques include using indexes, avoiding full table scanning, optimizing JOIN operations and improving code readability.

Redis uses a single threaded architecture to provide high performance, simplicity, and consistency. It utilizes I/O multiplexing, event loops, non-blocking I/O, and shared memory to improve concurrency, but with limitations of concurrency limitations, single point of failure, and unsuitable for write-intensive workloads.

Recovering deleted rows directly from the database is usually impossible unless there is a backup or transaction rollback mechanism. Key point: Transaction rollback: Execute ROLLBACK before the transaction is committed to recover data. Backup: Regular backup of the database can be used to quickly restore data. Database snapshot: You can create a read-only copy of the database and restore the data after the data is deleted accidentally. Use DELETE statement with caution: Check the conditions carefully to avoid accidentally deleting data. Use the WHERE clause: explicitly specify the data to be deleted. Use the test environment: Test before performing a DELETE operation.

MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.
