撤消MySQL数据库上所有用户的所有权限

Question

From: http://dev.mysql.com/doc/refman/5.0/en/drop-database.html

...when a database is dropped, user privileges on the database are not automatically dropped.

So the question becomes, how do you revoke all privileges for all users on a MySQL DB? I imagine it's simple, but I'm surprised I haven't been able to find this anywhere.

Answer 1

You can revoke all privileges for a specific user with this syntax :

REVOKE ALL PRIVILEGES, GRANT OPTION FROM user [, user] ...
FLUSH PRIVILEGES;

which drops all global, database, table, column, and routine privileges for the named user or users

Not sure if there's a way to do this for all users at once, though.

Answer 2

REVOKE ALL PRIVILEGES ON *.* FROM '<user_name>'@'localhost';
REVOKE ALL PRIVILEGES ON *.* FROM '<user_name>'@'%';

Eg.:

REVOKE ALL PRIVILEGES ON *.* FROM 'jeffrey'@'localhost';
REVOKE ALL PRIVILEGES ON *.* FROM 'jeffrey'@'%';

Answer 3

I suppose you can do:

REVOKE ALL PRIVILEGES FROM '%'@'%';
FLUSH PRIVILEGES;

(Don't modify MySQL tables directly)

Answer 4

REVOKE ALL PRIVILEGES FROM '%'@'%';

The above could be dangerous as i suppose it will delete all the privileges from all the users including root

Modify it to:

REVOKE ALL PRIVILEGES FROM 'user'@'localhost';

or

REVOKE ALL PRIVILEGES FROM 'user'@'%';

before execute

Answer 5

USE mysql; 
DELETE * FROM user;
FLUSH PRIVILEGES;

... will delete all users, including root and whatever you're connecting with, so you might want to add a WHERE clause.