添加远程用户admin密码为password GRANT ALL PRIVILEGES ON *.* TO admin@localhost IDENTIFIED BY \'password\' WITH GRANT OPTION GRANT ALL PRIVILEGES ON *.* TO admin@\"%\" IDENTIFIED BY \'password\' WITH GRANT OPTION
mysql教程添加远程用户或允许远程访问三种方法
用root用户登陆,然后:
grant all privileges on *.* to 创建的用户名 @"%" identified by "密码";
flush privileges; * 刷新刚才的内容*
格式:grant 权限 on 数据库教程名.表名 to 用户@登录主机 identified by "用户密码";
@ 后面是访问mysql的客户端ip地址(或是 主机名) % 代表任意的客户端,如果填写 localhost 为
本地访问(那此用户就不能远程访问该mysql数据库了)。
同时也可以为现有的用户设置是否具有远程访问权限。如下:
use mysql;
update db set host = '%' where user = '用户名'; (如果写成 host=localhost 那此用户就不具有远程访问权限)
flush privileges;
grant all privileges on *.* to 'myuser'@'%' identified by 'mypassword' with grant option;
方法二
1. 使用grant语句添加:首先在数据库本机上用root用户
登录mysql(我是用远程控制linux服务器,相当于在服务器本机登录mysql了),然后输入:
mysql>grant all privileges on *.* to admin@localhost identified by 'something' with grant option;
添加一个用户admin并授权通过本地机(localhost)访问,密码"something"。
mysql>grant all privileges on *.* to admin@"%" identified by 'something' with grant option;
添加一个用户admin并授权可从任何其它主机发起的访问(通配符%)。使用这一条语句即可。
2.使用insert语句:
mysql>insert into user values('%','admin',password('something'), 'y','y','y','y','y','y',
'y','y','y','y','y','y','y','y')
用户信息可在mysql数据库中的users表中查看,这里不在介绍了就。数清y的个数哦。
好了,使用admin帐号连接试试看,我是屡试屡成功哦,呵呵!
方法三
添加远程用户admin密码为password
grant all privileges on *.* to admin@localhost identified by 'password' with grant option
grant all privileges on *.* to admin@"%" identified by 'password' with grant option
由于项目开发的要求数据库的设计不得不用远程模式。但是数据库的远程设置并没那么简单,该项目的数据库是mysql5.0。刚开始以为只要装了数据库服务器就可以进行远程链接了,但是mysql的设置是为了用户的安全,系统默认的设置是不允许远程用户连接,只能本地的用户连接。只要我们设置下系统的管理员用户的host这一项的值就可以给远程的用户访问了。

ACID 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 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 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 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.

The 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.

InnoDB 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.

Key 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.

Usingtemporary 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


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