Prerequisite: Python: MySQL Create Table
In this article, we are going to see how to Inserting data into a new column of an already existing table in MySQL using Python. Python allows the integration of a wide range of database servers with applications. A database interface is required to access a database from Python. MySQL Connector Python module is an API in python for communicating with a MySQL database.
Database table in use:
We are going to use geeks(Database name) database and table describing the salary.
Approach:
- Import module.
- Make a connection request with the database.
- Create an object for the database cursor.
- Execute the following MySQL query:
ALTER TABLE person ADD salary int(20); UPDATE persons SET salary = '145000' where Emp_Id=12;
- And print the result.
Before starting let do the same in SQL:
Step 1: Create a new column with alter command.
ALTER TABLE table_name ADD column_name datatype;
Step 2: Insert data in a new column.
Below is the full implementation in python:
Python3
# Establish connection to MySQL database import mysql.connector db = mysql.connector.connect( host = "localhost" , user = "root" , password = "root123" , database = "geeks" ) # getting the cursor by cursor() method mycursor = db.cursor() query_1 = "ALTER TABLE person ADD salary int(20);" query_2 = "UPDATE persons SET salary = '145000' where Emp_Id=12;" # execute the queries mycursor.execute(query_1) mycursor.execute(query_2) mycursor.execute( "select * from persons;" ) myresult = mycursor.fetchall() for row in myresult: print (row) db.commit() # close the Connection db.close() |
Output:
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