How to Add a Column to a MySQL Table in Python?

How to Add a Column to a MySQL Table in Python?

To add a column to a MySQL table in Python, you can use the MySQLdb (or its fork mysqlclient) or the PyMySQL library, which provide a way to connect to MySQL databases and execute SQL queries. In this example, I will use PyMySQL to demonstrate the process.

Here's a step-by-step guide:

  • First, install the required library:
pip install pymysql
  • Use the library to connect to your MySQL database and add a column:
import pymysql # Database connection parameters db_params = { 'host': 'localhost', 'user': 'username', 'password': 'password', 'db': 'database_name' } # Connect to the database connection = pymysql.connect(**db_params) try: # Create a cursor object with connection.cursor() as cursor: # SQL query to add a new column sql = "ALTER TABLE table_name ADD COLUMN new_column_name column_type" # Execute the SQL query cursor.execute(sql) # Commit the changes connection.commit() finally: # Close the database connection connection.close()

Make sure to replace 'username', 'password', 'database_name', 'table_name', 'new_column_name', and 'column_type' with appropriate values for your database.

In the SQL query:

  • ALTER TABLE table_name: Specifies the table to which you want to add the new column.
  • ADD COLUMN new_column_name: Indicates you're adding a new column and specifies the name of the column.
  • column_type: Specifies the data type of the new column (e.g., VARCHAR(255), INT, DATE, etc.).

After you run the script, the specified table in your MySQL database should have a new column with the given name and data type.

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