MySQL中导出用户权限设置的脚本分享
在对MySQL数据库进行迁移的时候,有时候也需要迁移源数据库内的用户与权限。对于这个迁移我们可以从mysql.user表来获取用户的相关权限来生成相应的SQL语句,然后在目标服务器上来执行生成的SQL语句即可。本文提供了生成提取用户权限的脚本并给出演示。 1、生
在对MySQL数据库进行迁移的时候,有时候也需要迁移源数据库内的用户与权限。对于这个迁移我们可以从mysql.user表来获取用户的相关权限来生成相应的SQL语句,然后在目标服务器上来执行生成的SQL语句即可。本文提供了生成提取用户权限的脚本并给出演示。
1、生成用户权限的脚本
[root@HKBO ~]# more exp_grant.sh
#!/bin/bash
#Function export user privileges
pwd=123456
expgrants()
{
mysql -B -u'root' -p${pwd} -N $@ -e "SELECT CONCAT(
'SHOW GRANTS FOR ''', user, '''@''', host, ''';'
) AS query FROM mysql.user" | \
mysql -u'root' -p${pwd} $@ | \
sed 's/\(GRANT .*\)/\1;/;s/^\(Grants for .*\)/-- \1 /;/--/{x;p;x;}'
}
expgrants > ./grants.sql
2、生成权限SQL脚本
[root@HKBO ~]# ./exp_grant.sh
[root@HKBO ~]# head grants.sql
-- Grants for root@127.0.0.1
GRANT ALL PRIVILEGES ON *.* TO 'root'@'127.0.0.1' IDENTIFIED BY PASSWORD '*EB3EA446C759C9DA93F84FCB56430DBEF051A9DD' WITH GRANT OPTION;
GRANT ALL PRIVILEGES ON `CNBO0815`.* TO 'root'@'127.0.0.1' WITH GRANT OPTION;
-- Grants for root@172.16.10.%
GRANT ALL PRIVILEGES ON *.* TO 'root'@'172.16.10.%' IDENTIFIED BY PASSWORD '*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9';
-- Grants for CNBO@192.168.1.%
GRANT USAGE ON *.* TO 'CNBO'@'192.168.1.%' IDENTIFIED BY PASSWORD '*ABD91BAD4A3448428563952E281015B237310EA8';
...........................
3、在目标服务器上执行脚本
将生成的脚本在目标服务器上执行即可。 mysql -uname -ppwd 需要注意: a、目标服务上为非空服务器,已经存在一些账户及权限应考虑会覆盖的问题。
b、如果仅仅需要迁移非root用户,可以在原脚本中添加过滤条件,即 where user'root' 。

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

It allows users to perform more in-depth operations and customization of the system. Root permission is an administrator permission in the Android system. Obtaining root privileges usually requires a series of tedious steps, which may not be very friendly to ordinary users, however. By enabling root permissions with one click, this article will introduce a simple and effective method to help users easily obtain system permissions. Understand the importance and risks of root permissions and have greater freedom. Root permissions allow users to fully control the mobile phone system. Strengthen security controls, customize themes, and users can delete pre-installed applications. For example, accidentally deleting system files causing system crashes, excessive use of root privileges, and inadvertent installation of malware are also risky, however. Before using root privileges

MySQL query performance can be optimized by building indexes that reduce lookup time from linear complexity to logarithmic complexity. Use PreparedStatements to prevent SQL injection and improve query performance. Limit query results and reduce the amount of data processed by the server. Optimize join queries, including using appropriate join types, creating indexes, and considering using subqueries. Analyze queries to identify bottlenecks; use caching to reduce database load; optimize PHP code to minimize overhead.

Backing up and restoring a MySQL database in PHP can be achieved by following these steps: Back up the database: Use the mysqldump command to dump the database into a SQL file. Restore database: Use the mysql command to restore the database from SQL files.

How to insert data into MySQL table? Connect to the database: Use mysqli to establish a connection to the database. Prepare the SQL query: Write an INSERT statement to specify the columns and values to be inserted. Execute query: Use the query() method to execute the insertion query. If successful, a confirmation message will be output.

One of the major changes introduced in MySQL 8.4 (the latest LTS release as of 2024) is that the "MySQL Native Password" plugin is no longer enabled by default. Further, MySQL 9.0 removes this plugin completely. This change affects PHP and other app

To use MySQL stored procedures in PHP: Use PDO or the MySQLi extension to connect to a MySQL database. Prepare the statement to call the stored procedure. Execute the stored procedure. Process the result set (if the stored procedure returns results). Close the database connection.

Creating a MySQL table using PHP requires the following steps: Connect to the database. Create the database if it does not exist. Select a database. Create table. Execute the query. Close the connection.

Oracle database and MySQL are both databases based on the relational model, but Oracle is superior in terms of compatibility, scalability, data types and security; while MySQL focuses on speed and flexibility and is more suitable for small to medium-sized data sets. . ① Oracle provides a wide range of data types, ② provides advanced security features, ③ is suitable for enterprise-level applications; ① MySQL supports NoSQL data types, ② has fewer security measures, and ③ is suitable for small to medium-sized applications.
