The SET PASSWORD command can be used to modify a user's login password. If the [FOR user_identity] field does not exist, then change the current user's password
SET PASSWORD [FOR user_identity] =
[PASSWORD('plain password')]|['hashed password']
Note that the user_identity here must exactly match the user_identity specified when creating a user with CREATE USER, otherwise an error will be reported that the user does not exist. If user_identity is not specified, the current user is 'username'@'ip', which may not match any user_identity. Current users can be viewed through SHOW GRANTS.
The plaintext password is input in the PASSWORD() method; when using a string directly, the encrypted password needs to be passed. To modify the passwords of other users, administrator privileges are required.
Modify the current user's password
SET PASSWORD = PASSWORD('123456')
SET PASSWORD = '*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9'
Modify the specified user password
SET PASSWORD FOR 'jack'@'192.%' = PASSWORD('123456')
SET PASSWORD FOR 'jack'@['domain'] = '*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9'