MySQL common commands (import, export, create services, create users, change passwords, etc.)

1. Install the service

• mysqld install service name

2. Uninstall the service

• mysqld --remove mysql (service name)

3. Start the mysql service

• net start mysql

4. Login to mysql

• mysql -u root -p

5. Reset password:

• Method 1: Use the SET PASSWORD command
• First log in to MySQL.
• Format: mysql> set password for username@localhost = password('new password');
• 例子：mysql> set password for root@localhost = password('123');

• Method 2: Using mysqladmin
• Format: mysqladmin -u username -p old password password new password
• Example: mysqladmin -uroot -p123456 password 123

• Method 3: Edit the user table directly with UPDATE
• First log in to MySQL.
• mysql> use mysql;
• mysql> update user set password=password('123') where user='root' and host='localhost';
• mysql> flush privileges;

6. The command for mysql to export the database:

• mysqldump -u root -p test > c:/test.sql

7. Import database command:

• mysql>source d:\test.sql

8. The command to query the dataset:

• 1）show variables like 'character_set_%'
• 2）show variables like 'coll%'

9. The command to create the database:

• CREATE DATABASE test
• CHARACTER SET 'utf8'
• COLLATE 'utf8_general_ci';

10. Modify the table column name

• alter table generalscore change  column srid pid ;