Python my sql database connection
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The document provides instructions on how to connect to a MySQL database using Python, including the necessary credentials and code snippets. It explains how to establish a connection, create a cursor object, execute a query, and fetch data from the database. Additionally, it hints at future topics related to creating databases, tables, and inserting data in MySQL.
Python my sql database connection
- 1. Swipe Python MySQL - Database Connection
- 2. To connect with MySQL, (one way is to) open the MySQL command prompt in your system as shown below Python MySQL - Database Connection It asks for password here; you need to type the password you have set to the default user (root) at the time of installation.
- 3. 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.
- 4. You can disconnect from the MySQL database any time using the exit command at mysql> prompt. mysql> exit Bye
- 5. Establishing connection with MySQL using python 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.
- 6. Example 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()
- 7. Output On executing, this script produces the following output:- You can also establish connection to MySQL by passing credentials (user name, password, hostname, and database name) to connection.MySQLConnection() as shown below:- D:Python_MySQL>python EstablishCon.py Connection established to: ('mydb',) 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()
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