How to get a list of MySQL user accounts

问题:

I'm using the MySQL command line utility and can navigate through a database. Now I need to see a list of user accounts. How can I do this?

I'm using MySQL version 5.4.1.

回答1:

Use this query:

SELECT User FROM mysql.user;

Which will output a table like this:

+-------+
| User  |
+-------+
| root  |
+-------+
| user2 |
+-------+

As Matthew Scharley points out in the comments on this answer, you can group by the User column if you'd only like to see unique usernames.

回答2:

I find this format the most useful as it includes the host field which is important in MySQL to distinguish between user records.

select User,Host from mysql.user;

回答3:

A user account comprises the username and the host level access.

Therefore, this is the query that gives all user accounts

SELECT CONCAT(QUOTE(user),'@',QUOTE(host)) UserAccount FROM mysql.user;

回答4:

to avoid repetitions of users when they connect from different origin:

select distinct User from mysql.user;

回答5:

If you are referring to the actual MySQL users, try:

select User from mysql.user;

回答6:

MySQL stores the user information in its own database. The name of the database is MySQL. Inside that database, the user information is in a table, a dataset, named user. If you want to see what users are set up in the MySQL user table, run the following command:

SELECT User, Host FROM mysql.user;

+------------------+-----------+
| User             | Host      |
+------------------+-----------+
| root             | localhost |
| root             | demohost  |
| root             | 127.0.0.1 |
| debian-sys-maint | localhost |
|                  | %         |
+------------------+-----------+

回答7:

SELECT * FROM mysql.user;

It's a big table so you might want to be more selective on what fields you choose.

回答8:

Login to mysql as root and type following query

select User from mysql.user;

+------+
| User |
+------+
| amon |
| root |
| root |
+------+

回答9:

The mysql.db table is possibly more important in determining user rights. I think an entry in it is created if you mention a table in the GRANT command. In my case the mysql.users table showed no permissions for a user when it obviously was able to connect and select, etc.

mysql> select * from mysql.db;
mysql> select * from db;
+---------------+-----------------+--------+-------------+-------------+-------------+--------
| Host          | Db              | User   | Select_priv | Insert_priv | Update_priv | Del...

回答10:

Peter and Jesse are correct but just make sure you first select the mysql DB.

use mysql;

select User from mysql.user;

that should do your trick

回答11:

I use this to sort the users, so the permitted hosts are more easy to spot:

mysql> SELECT User,Host FROM mysql.user ORDER BY User,Host;

回答12:

This displays list of unique users:

SELECT DISTINCT User FROM mysql.user;

回答13:

$>  mysql -u root -p -e 'Select user from mysql.user' > allUsersOnDatabase.txt

Executing this command on linux prompt will first ask for the password of mysql root user, on providing correct password it will print all the database users to the text file.

回答14:

I found his one more useful as it provides additional information about DML and DDL privileges

SELECT user, Select_priv, Insert_priv , Update_priv, Delete_priv, 
       Create_priv, Drop_priv, Shutdown_priv, Create_user_priv 
FROM mysql.user;