MySQL修改root密码并不难
以下的文章主要介绍MySQL 修改 root 密码命令实际应用的介绍,其中包括对更改MySQL数据库的root 管理员密码以及MySQL 数据库修改root 密码命令等相关内容的介绍,希望会给你带来一些帮助在此方面。 一、请问在win2K命令提示符下怎样更改MySQL的root管理员密
以下的文章主要介绍MySQL 修改 root 密码命令实际应用的介绍,其中包括对更改MySQL数据库的root 管理员密码以及MySQL 数据库修改root 密码命令等相关内容的介绍,希望会给你带来一些帮助在此方面。
一、请问在win2K命令提示符下怎样更改MySQL的root管理员密码?
<ol class="dp-xml"> <li class="alt"> <span><span class="tag">></span></span>MySQL<span><span> -u root -p </span></span> </li> <li><span>Enter password: ****** </span></li> <li class="alt">MySQL<span class="tag">></span><span> use </span>MySQL<span>; </span> </li> <li>MySQL<span class="tag">></span><span> update user set </span><span class="attribute">password</span><span class="attribute-value">password</span><span>=password('new_password') where </span><span class="attribute">user</span><span>=</span><span class="attribute-value">'root'</span><span>; </span> </li> </ol>
通过这种方法就可以直接MySQL 修改密码了。至于在CMD下能否登陆MySQL,就要在Windows环境变量PATH中添加“C:\Program Files\MySQL\MySQL Server 5.0\bin;”(请改为你自己的安装路径)了。
二、MySQL 修改root密码命令
cmd下切换到 MySQL 安装目录
例
d:/MySQL/bin
前提:MySQL用户root密码为空.
输入 MySQL -u root MySQL
MySQL> 状态下输入 update user set password=password('新密码') where user='root';
回显
Query OK, 0 rows affected (0.00 sec)
Rows matched: 2 Changed: 0 Warnings: 0
MySQL> 状态下输入 FLUSH PRIVILEGES;
回显
Query OK, 0 rows affected (0.00 sec)
MySQL> 状态下输入 quit
退出 sql
注意每个命令后都要加上一个分号 ";"
MySQL 才开始执行该行命令
而第二个指令会让已载入记忆体的 MySQL 系统资料库更新
重起 MySQL .
在更新 root 密码後,日後要与 MySQL 连线的方法为:
MySQL -uroot -p新密码
忘记MySQL 的root 密码:
先确认已经杀掉MySQLd 进程了,然后执行这个
/usr/bin/safe_MySQLd --skip-grant-tables &
再这样登录
MySQL -h 192.168.1.2 -u root
上边的192.168.1.2 是cloud 的MySQLd 运行机器,你换成自己的,这样登录上
去,就可以MySQL 修改密码了。
修改密码
1.MySQL -h hostname –u root 命令登录到MySQLd server 用grant 命令改变口令:
Grant all on *.* to root indentified by "111111"
2. MySQLadmin -u 用户名-p 旧密码password 新密码
例1:给root 加个密码ab12。首先在DOS 下进入目录MySQLbin,然后键入
以下命令
MySQLadmin -uroot password ab12
注:因为开始时root 没有密码,所以-p 旧密码一项就可以省略了。
2、例2:再将root 的密码改为djg345。
MySQLadmin –u root -pab12 password djg345 (注意-p 不要和后面的密码分
开写,要写在一起)
3.
<ol class="dp-xml"> <li class="alt">use MySQL<span>; update user set </span><span class="attribute">password</span><span class="attribute-value">password</span><span> =password('yourpass') where </span><span>user='r </span> </li> <li><span>oot' </span></li> </ol>
4. 载入权限表: `MySQLadmin -h hostname flush-privileges' ,或者使
用SQL 命令`FLUSH PRIVILEGES'。(当然,在这里,你也可以重启MySQLd。)
MySQL 的建库,添加数据方法:
<ol class="dp-xml"> <li class="alt"><span><span>mysqi –u root </span></span></li> <li>MySQL<span class="tag">></span><span>create database ttt; </span> </li> <li class="alt">MySQL<span class="tag">></span><span>source 1.txt </span> </li> <li>MySQL<span class="tag">></span><span>load data local infile "2.txt" into table board; </span> </li> </ol>
1.txt 内容:
<ol class="dp-xml"> <li class="alt"><span><span>CREATE TABLE board ( </span></span></li> <li><span>boardid int(11) NOT NULL auto_increment, </span></li> <li class="alt"><span>boardname char(255), </span></li> <li><span>PRIMARY KEY (boardid) </span></li> <li class="alt"><span>); </span></li> </ol>
2.txt 内容:
1 lk(Tab 键分开)
2 lklk
3 lklklk
导出database:
#MySQLdump –opt ttt –uroot –p111111 > 111.sql
导入database
1. #MySQL –u root –p111111 ttt
2. MySQL>source 111.sql;
导出的多个database:#MySQLdump –-databases ttt1 ttt2 ttt3 –uroot –p111111
> 111.sql
导出所有database:#MySQLdump –-all-databases –uroot –p111111 > 111.sql
补一下不知道root密码情况下MySQL 修改root密码
MySQLd启动的时候加上–skip-grant-tables,然后马上修改密码,修改后去掉–skip-grant-tables,然后就OK了。

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 suitable for beginners because it is simple to install, powerful and easy to manage data. 1. Simple installation and configuration, suitable for a variety of operating systems. 2. Support basic operations such as creating databases and tables, inserting, querying, updating and deleting data. 3. Provide advanced functions such as JOIN operations and subqueries. 4. Performance can be improved through indexing, query optimization and table partitioning. 5. Support backup, recovery and security measures to ensure data security and consistency.

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.

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.

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.

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.

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.
