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Python my sql database connection | PDF
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Python MySQL - Database
Connection
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.
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
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.
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()
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()
Python MySQL - Create Database
Python MySQL - Create Table
Python MySQL - Insert Data
Topics for next Post
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Python my sql database connection

  • 1.
    Swipe Python MySQL -Database Connection
  • 2.
    To connect withMySQL, (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 connectionis 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 disconnectfrom the MySQL database any time using the exit command at mysql> prompt. mysql> exit Bye
  • 5.
    Establishing connection withMySQL 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 theexample 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, thisscript 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()
  • 8.
    Python MySQL -Create Database Python MySQL - Create Table Python MySQL - Insert Data Topics for next Post Stay Tuned with