错误 1044 (42000)：用户 ''@'localhost' 对数据库 'db' 的访问被拒绝

Question

I want to begin writing queries in MySQL.

show grants shows:

+--------------------------------------+
| Grants for @localhost                |
+--------------------------------------+
| GRANT USAGE ON *.* TO ''@'localhost' |
+--------------------------------------+

I do not have any user-id but when I want to make a user I don't have privilleges, also I don't know how to make privileges when even I don't have one user!

mysql> CREATE USER 'parsa'@'localhost' IDENTIFIED BY 'parsa';
ERROR 1227 (42000): Access denied; you need (at least one of) the CREATE USER pr
ivilege(s) for this operation

I tried to sign in as root:

mysql> mysql -u root -p;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'mysql
 -u root -p' at line 1
mysql> mysql -u root -p root;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'mysql
 -u root -p root' at line 1

Answer 1

No, you should run mysql -u root -p in bash, not at the MySQL command-line. If you are in mysql, you can exit by typing exit .

Answer 2

You may need to set up a root account for your MySQL database:

In the terminal type:

mysqladmin -u root password 'root password goes here'

And then to invoke the MySQL client:

mysql -h localhost -u root -p

Answer 3

I was brought here by a different problem. Whenever I tried to login, i got that message because instead of authenticating correctly I logged in as anonymous user. The solution to my problem was:

To see which user you are, and whose permissions you have:

select user(), current_user();

To delete the pesky anonymous user:

drop user ''@'localhost';

Answer 4

This is something to do with user permissions. Giving proper grants will solve this issue.

Step [1]: Open terminal and run this command

$ mysql -uroot -p

Output [1]: This should give you mysql prompt shown below

Step [2]:

mysql> CREATE USER 'parsa'@'localhost' IDENTIFIED BY 'your_password';
mysql> grant all privileges on *.* to 'parsa'@'localhost';

Syntax:

mysql> grant all privileges on `database_name`.`table_name` to 'user_name'@'hostname';

Note:

• hostname can be IP address, localhost, 127.0.0.1
• In database_name / table_name , * means all databases
• In hostname , to specify all hosts use '%'

Step [3]: Get out of current mysql prompt by either entering quit / exit command or press Ctrl+D .

Step [4]: Login to your new user

$ mysql -uparsa -pyour_password

Step [5]: Create the database

mysql> create database `database_name`;

Answer 5

You might want to try the full login command:

mysql -h host -u root -p 

where host would be 127.0.0.1 .

Do this just to make sure cooperation exists.

Using mysql -u root -p allows me to do aa lot of database searching, but refuses any database creation due to a path setting.

Answer 6

If you are in a MySQL shell, exit it by typing exit , which will return you to the command prompt.

Now start MySQL by using exactly the following command:

sudo mysql -u root -p

If your username is something other than root, replace 'root' in the above command with your username:

sudo mysql -u <your-user-name> -p

It will then ask you the MySQL account/password, and your MySQL won't show any access privilege issue then on.

Answer 7

First, if you are unfamiliar with the command line, try using phpmyadmin from your webbrowser. This will make sure you actually have a mysql database created and a username.

This is how you connect from the command line (bash):

mysql -h hostname -u username -p database_name

For example:

fabio@crunchbang ~ $ mysql -h 127.0.0.1 -u fabio -p fabiodb

Answer 8

@Nickparsa … you have 2 issues:

1). mysql -uroot -p should be typed in bash (also known as your terminal) not in MySQL command-line. You fix this error by typing

exit

in your MySQL command-line. Now you are back in your bash/terminal command-line.

2). You have a syntax error:

mysql -uroot -p; 

the semicolon in front of -p needs to go. The correct syntax is:

mysql -uroot -p

type the correct syntax in your bash commandline. Enter a password if you have one set up; else just hit the enter button. You should get a response that is similar to this:

Hope this helps!

Answer 9

connect mysql with sudo & gives permission for the necessary user using,

sudo mysql -u user;
GRANT ALL PRIVILEGES ON database_name.* TO 'user'@'localhost';

Answer 10

Most Developers log-in to server(I assume you r having user-name and password for mysql database) then from Bash they switch to mysql> prompt then use the command below(which doesn't work

mysql -h localhost -u root -p

What needs to be done is use the above command in the bash prompt--> on doing so it will ask for password if given it will take directly to mysql prompt and

then database, table can be created one by one

I faced similar deadlock so sharing the experience

Answer 11

根据上述答案，我的命令是正确的，我错过的是在工作台上，我们在那里为用户提到了“限制来自主机的连接”，它默认为“％” - 将其更改为“localhost”，此后连接正常！

Answer 12

I'm using roles to confer least privilege on my database application users. I kept getting 'ERROR 1044 (42000): Access denied for user...' until I RTFM and discovered I had to give each user a default role(s) in order their account could be authenticated when they logged in.

#create a role
CREATE ROLE 'rolename';

#give necessary privileges to role
GRANT INSERT, UPDATE, DELETE, SELECT ON database.table TO 'rolename';

#create user
CREATE USER 'username'@'host' IDENTIFIED BY 'password';

#give the user a role(s)
GRANT 'rolename' TO 'username'@'host';

#set the user's default otherwise it's ERROR 1044
SET DEFAULT ROLE 'rolename' FOR 'username'@'host';