MySQL server is an open-source relational database management system that is a major support for web-based applications. Databases and related tables are the main component of many websites and applications as the data is stored and exchanged over the web. In order to access MySQL databases from a web server, we use various modules in Python such as PyMySQL, mysql.connector, etc.
In this article, we are going to grant permissions to a user in accessing a database and its MySQL tables. The CREATE USER statement creates a user account with no privileges. The statement for creating a user in MySQL is given below.
CREATE USER 'user_name'@'localhost' IDENTIFIED BY 'password';
The above user can log in into MySQL Server, but cannot do anything such as querying data and selecting a database from tables. In our case, user_name is neveropen and password for login is 1234.
To change the user in MySQL client, use the below command:
SYSTEM MYSQL -u neveropen -p1234;
To check the current user, one can use the below command:
SELECT user();
The above statement could be used to know the permissions of the user.
SHOW GRANTS FOR user_name@localhost;
See the below example:
Default Privileges
Note: To grant permissions to the user Lazyroarforgeesks you must be logged into root account. Users can’t grant permissions to themselves.
Below is the python program to add table and column permissions to the user neveropen:
Python3
# import required moduleimport pymysql# establish connection to MySQLconnection = pymysql.connect( # specify host host='localhost', # specify root account user='root', # specify password for root account password='1234', # default port number is 3306 fro MySQL port=3306)# make a cursor to run sql queriesmycursor = connection.cursor()# granting all permissions on all databases and their # tables of neveropen user permission also includes # table and column grantsmycursor.execute("Grant all on *.* to neveropen@localhost")# print all privileges of neveropen usermycursor.execute("Show grants for neveropen@localhost")result = mycursor.fetchall()print(result)# commit privilegesmycursor.execute("Flush Privileges")# close connection to MySQLconnection.close() |
Output
Python Output
MySQL Terminal
MySQL output
We could see that permissions to CREATE and ALTER MySQL tables have been provided to user neveropen.
