To connect with MySQL, (one way is to) open the MySQL command prompt in your system as shown below −
It asks for password here; you need to type the password you have set to the default user (root) at the time of installation.
Then a connection is established with MySQL displaying the following message −
Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 4 Server version: 5.7.12-log MySQL Community Server (GPL) Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
You can disconnect from the MySQL database any time using the exit command at mysql> prompt.
mysql> exit Bye
Before establishing connection to MySQL database using python, assume −
That we have created a database with name mydb.
We have created a table EMPLOYEE with columns FIRST_NAME, LAST_NAME, AGE, SEX and INCOME.
The credentials we are using to connect with MySQL are username − root, password − password.
You can establish a connection using the connect() constructor. This accepts username, password, host and, name of the database you need to connect with (optional) and, returns an object of the MySQLConnection class.
Following is the example of connecting with MySQL database "mydb".
import mysql.connector #establishing the connection conn = mysql.connector.connect( user='root', password='password', host='127.0.0.1', database='mydb' ) #Creating a cursor object using the cursor() method cursor = conn.cursor() #Executing an MYSQL function using the execute() method cursor.execute("SELECT DATABASE()") #Fetch a single row using fetchone() method. data = cursor.fetchone() print("Connection established to: ",data) #Closing the connection conn.close()
On executing, this script produces the following output −
D:\Python_MySQL>python EstablishCon.py Connection established to: ('mydb',)
You can also establish connection to MySQL by passing credentials (user name, password, hostname, and database name) to connection.MySQLConnection() as shown below −
from mysql.connector import (connection) #establishing the connection conn = connection.MySQLConnection( user='root', password='password', host='127.0.0.1', database='mydb' ) #Closing the connection conn.close()