The document discusses the integration of Python with SQL databases, emphasizing the importance of databases in organizations and how Python can interface with various database systems like MySQL. It covers the installation of MySQL Connector, the process for connecting Python to a MySQL database, and the general advantages of using Python for database operations. Key steps for establishing a connection and ensuring proper setup are outlined, including necessary commands and configurations.

1. CHAPTER-5
INTERFACE PYTHON WITH SQL

2. INTERFACE PYTHON WITH SQL DATABASE
❖Databases pay a vital role in the efficient working of an
organization( schools, companies)etc..
❖Every Organizations depends upon large databases.E.g In
schools ,Admin section will store the details related to
Students(personal and academic wise),teaching and non teaching
staffs details etc.
❖In database ,Data are organized into rows, columns and tables
and it is indexed to make it easier to find relevant information.
❖So it become necessary to develop project/software using any
programming language like python in such a manner which can
interface with such databases which support MYSQL.

3. INTERFACE PYTHON WITH SQL DATABASE
❖SQL is just a query language, it is not a database. To perform SQL
queries, we need to install any database for example Oracle,
MySQL, MongoDB, PostgreSQL SQL, SQL Server, DB2 etc.
❖Python supports all the above Databases. Python supports
DDL,DML statements which is used to create and manipulate data
in Databases( My Sql).
❖The Python standard for database interfaces is the Python DB-
API(Data Base-Application Programming Interface).

4. INTERFACE PYTHON WITH SQL DATABASE
❖ While designing real life applications ,certain situations arise pertaining to storing some
important and necessary information by the user.
❖ Usually data inputted by the user along with generated output is displayed but not stored
like in My SQL Query and the Displayed output will be erased once we exit from the
database.
❖ This limitations can be overcome by sending the output generated and saving the input
fetched from the user in a database created at the Backend of the application(My SQL).
The input is fetched from the user using Python interface. This is termed as Front end
Interface of the application.
STORE DATA CODING
BACK END(My
SQL
FRONT END
(PYTHON)

5. INTERFACE PYTHON WITH SQL DATABASE
❖ Generalised form of Interface of python with SQL Database can be understood with the
help of this diagram.
❖ Form/any user interface designed in any programming language is Front End where as
data given by database as response is known as Back-End database
My SQL PYTHO
N
BACK
END
FRONT
END

6. WHY CHOOSE PYTHON FOR DATABASE PROGRAMMING
❖Programming more efficient and faster compared to other
languages.
❖Portability of python programs.
❖Support platform independent program development.
❖Python supports SQL cursors(pointers).
❖Python itself take care of open and close of connections.
❖Python supports relational database systems.
❖Porting of data from one dbms to other is easily possible as it
support large range of APIs for various databases.

7. INSTALLING MYSQL-CONNECTOR
❖ To establish connectivity between Python and MySQL ,we require Python Database
Interfaces and APIs.
❖ We must download a separate DB API module for each database we need to access.
❖ Suppose we need to access an Oracle database as well as a MySQL database, we must
download both the Oracle and the MySQL database modules .
❖The DB API provides a minimal standard for working with databases
using Python structures and syntax wherever possible.
❖This API includes the following −
● Importing the API module.
● Acquiring a connection with the database.
● Issuing SQL statements and stored procedures.
● Closing the connection

8. INSTALLING MYSQL-CONNECTOR
❖ Steps for python MySQL connectivity
❖ Mysql.connector-Library or package to connect from python to MySQL.
1 . Install Python
2. Install MySQL
3. Open Command prompt
4. Switch on internet connection
5. Type pip install mysql-connector-python COMMAND and EXECUTE .
6. Open python IDLE
7. import mysql.connector

9. INSTALLING MYSQL-CONNECTOR(STEP:5)
❖GOAL: Connect Python with MySQL.
1) Your system should be connect with internet.
2) Python and MySQL should be installed in your system.
3) Install MySQL connector go to Command prompt (run cmd)
4) Click OK Button, command Prompt will open .

10. INSTALLING MYSQL-CONNECTOR(STEP:5.. )
Do ensure that MySQL-connector is installed in the same folder as Python and takes the path as
NOTE: if you are not
installing it through the
direct path sometimes
MYSQL connector
will not work properly

11. INSTALLING MYSQL-CONNECTOR(STEP:5….)
❖ Once you have set the path, type the command as –
❖ After type this command, successfully MySQL connector will installed in your computer.
COMMANDS
WILL RUN
AUTOMATICALL
Y ….

12. OPEN PYTHON IDLE(STEP 6)
❖ Now we need to check whether mysql connector is properly installed or not–
(1) Open Python IDLE(Python shell)
(2) Type the command import mysql.connector
If it is successfully installed then no error message will be there.

13. ESTABLISH CONNECTION(STEP 7)
❖ First Step is finished, Next step is Using MYSQL in Python scripts is to make a connection to
the database that you wish to use.(MAKE SURE THE DATABASE YOU ARE
GOING TO CONNECT TO THE Python IS ALREADY CREATED IN
MySQL)
❖ Open python file in script mode and type the below command.
❖ Once Type finished, Save it and Run the module, If every thing is worked fine you will get a
message in Python Shell.
Charset is
optional.

14. ESTABLISH CONNECTION(STEP 7)
❖ Make sure the username and password you are entering for MySQL should be correct.
Mostly
it is “root” as user id and pwd as “root” or ” “ .Here it is root for both.
Your server/PC: normally
it is localhost
(if any other server is
connected to your PC, then
you have to give the IP
address of it)
Which database you are
going to connect that
database name should be
mentioned here.(Pls make
sure Database is already
created.)
User ID and
Password of
My SQL
Character set which is
supported by Python.
It is Unicode8Bit encoding
System
Mostly host,user,passwd and
charset will be common for all
.
Charset is
optional.

15. ESTABLISH CONNECTION(STEP 7)
❖ Make sure the username and password you are entering for MySQL should be correct.
Mostly
it is “root” as user id and pwd as “root” or ” “ .Here it is root for both.
Your server/PC: normally
it is localhost
(if any other server is
connected to your PC, then
you have to give the IP
address of it)
Which database you are
going to connect that
database name should be
mentioned here.(Pls make
sure Database is already
created.)
User ID and
Password of
My SQL
Character set which is
supported by Python.
It is Unicode8Bit encoding
System
connect() function creates a connection to the
MySQL Server and returns a MySQL connection
Object.
Charset is
optional.

16. PRACTICAL IMPLEMENTATION:1
TO ESTABLISH A CONNECTION BETWEEN MYSQLAND PYTHON
Charset is
optional.