Create a Sql Express User With Read Only Access

Introduction

MySQL is a database application for Linux and part of the pop LAMP stack (Linux, Apache, MySQL, PHP). A MySQL installation includes options of managing through a root user or specific user accounts.

For security reasons, it is generally better to create and handle data equally specific users.

In this tutorial, learn how to create MySQL user accounts and managing their permissions and privileges.

Prerequisites

• A Linux server with MySQL or MariaDB installed and running
• Access to the MySQL root user credentials
• Access to a last window/control-line (Ctrl-Alt-T / Ctrl-Alt-F2)

How to Create New MySQL User

1. Before yous tin create a new MySQL user, you lot need to open up a last window and launch the MySQL shell as the root user. To do and so, enter the following control:

          sudo mysql –u root –p        

2. Blazon in the root password for this account and press Enter.

The prompt should alter to show that yous are in the mysql> shell.

three. Next, create a new MySQL user with:

          CREATE USER 'username' IDENTIFIED BY 'password';        

Replace username and password with a username and password of your choice.

Alternatively, you tin set up up a user by specifying the machine hosting the database.

• If yous are working on the car with MySQL, apply [email protected] to define the user.
• If you are connecting remotely, employ [email protected]_address, and replace ip_address with the actual accost of the remote system hosting MySQL.

Therefore, the command will be:

          CREATE USER 'username'@'localhost' IDENTIFIED BY 'password';        

or

          CREATE USER 'username'@'ip_address' IDENTIFIED Past 'password';        

You tin also create a user that can connect from whatever machine with the command:

          CREATE USER 'username'@'%' IDENTIFIED BY 'password';        

Note: Make certain you use a potent and complex countersign, especially if y'all are setting upward a user who can connect from any automobile.

How to Grant Permissions in MySQL

Before logging in with a new account, brand sure you have set the permissions for the user.

Permissions are actions that the user is allowed to perform in the database. Depending on how much authorisation yous want your user to have, yous tin can grant them one, several or all of the post-obit privileges:

• All Privileges: The user business relationship has full admission to the database
• Insert: The user can insert rows into tables
• Delete: The user can remove rows from tables
• Create: The user tin create entirely new tables and databases
• Driblet: The user can drib (remove) entire tables and databases
• Select: The user gets access to the select control, to read the data in the databases
• Update: The user can update tabular array rows
• Grant Selection: The user can modify other user business relationship privileges

The basic syntax used to grant privileges to a user account is:

          GRANT permission_type ON database.table TO 'username'@'localhost';        

For example, to grant insert privileges to a MySQL user you lot would run the command:

          GRANT INSERT ON *.* TO 'username'@'localhost';        

You tin can replace the privilege level according to your needs. Run the command for each privilege you wish to grant.

If you want to limit the user'due south access to a specific database, name that database before the dot. Likewise, you can restrict a user's access to a particular tabular array by naming information technology after the dot, equally in the command below:

          GRANT INSERT *database_name.table_name* TO 'username'@'localhost';        

MySQL User Direction

This section will help you list the privileges held by a user account, have privileges away from a user, and completely delete a user account. It volition as well show you how to log out of the root MySQL user account, and log back in under the account you've merely created.

How to List MySQL User Account-Privileges

To display all the current privileges held past a user:

          Bear witness GRANTS FOR username;        

How to Grant All Privileges on a Database in MySQL

To grant all privileges to MySQL User on all databases utilise the command:

          GRANT ALL PRIVILEGES ON *.* TO 'database_user'@'localhost';        

However, you lot can also grant all privileges to a user account on a specific database with the following command:

          GRANT ALL PRIVILEGES ON database_name.* TO 'database_user'@'localhost';        

To grant all privileges to a user account over a specific table from a database type:

          GRANT ALL PRIVILEGES ON database_name.table_name TO 'database_user'@'localhost';        

Revoke Privileges MySQL User Business relationship

To accept back privileges from a specific user, utilise the REVOKE control. Information technology works like to the GRANT command, its basic syntax being:

          REVOKE permission_type ON database.table TO 'username'@'localhost';        

Remove an Entire User Account

To delete a MySQL user account utilize the command:

          Drib USER 'username'@'localhost';        

Determination

Y'all should now be able to create, alter, delete users and grant permissions in a MySQL database.

To meliorate security and limit adventitious impairment it is better to utilize a regular user instead of a root user in a production environs. You can also secure your database by limiting users just to the privileges required for their jobs.

After creating MySQL users and granting the privileges, our suggestion is to bank check out our article on how to allow remote connections to MySQL database.

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Source: https://phoenixnap.com/kb/how-to-create-new-mysql-user-account-grant-privileges