MySQL-08

8、 Rights management and backup

8.1、 User management

SQLyog Visual management

SQL The command operation

User table ：mysql.user

The essence ： Add, delete, modify and check this table

--  Create user  CREATE USER  user name  IDENTIFIED BY ' password ';
CREATE USER zourong IDENTIFIED BY '123456';

--  Change Password （ Change the current user password ）
SET PASSWORD = PASSWORD('123456');


--  Change Password （ Change the specified user password ）
SET PASSWORD FOR zourong=PASSWORD('123456')

--  rename  RENAME USER  Original name  TO  New name ;
RENAME USER zourong2 TO zourong;

--  User authorization  ALL PRIVILEGES-> All permissions   library . surface 
-- ALL PRIVILEGES  In addition to empowering others , Everything else can 
GRANT ALL PRIVILEGES ON *.* TO zourong;

--  View permissions 
SHOW GRANTS FOR zourong;
SHOW GRANTS FOR root@localhost;

-- ROOT User permissions ：GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' WITH GRANT OPTION

--  Revoke authority  REVOKE  What authority , In which library , To whom 
REVOKE ALL PRIVILEGES ON *.* FROM zourong;

--  Delete user 
DROP USER zourong;

8.2、MySQL Backup

Why backup

• Ensure that important data is not lost
• Data transfer A—>B

MySQL Database backup mode

• Copy physical files directly

• stay SQLyog Manually export... In this visualization tool

  • In the table or library you want to export , Right click , Select backup or export
  • 

• Use the command line to export mysqldump Command line

  # mysqldump -h  host  -u  user name  -p  password   database   Table name  > Physical disk location / file name 
  mysqldump -hlocalhost -uroot -p123456 school student >D:/a.sql
  
  # mysqldump -h  host  -u  user name  -p  password   database   surface 1  surface 2  surface 3 > Physical disk location / file name 
  mysqldump -hlocalhost -uroot -p123456 school student result>D:/b.sql
  
  # mysqldump -h  host  -u  user name  -p  password   database  > Physical disk location / file name 
  mysqldump -hlocalhost -uroot -p123456 school>D:/c.sql
  
  #  Import 
  #  In case of login , Switch to the specified database 
  # source  Backup file 
  source D:/b.sql
  
  mysql -u user name  -p123456  Library name < Backup file 
  

Suppose you want to back up the database , Prevent data loss

Give the database to others ,sql Just give the document