Prerequisite: Python: MySQL Create Table
In this article, we are going to see how to count the table column of a MySQL Table 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.
We are going to use Lazyroar(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:
SELECT count(*) AS New_column_name FROM information_schema.columns where table_name = ‘Table_name’;
Example 1:
In this example we are using this database with the following query;
Python3
# Establish connection to MySQL database import mysql.connector mydb = mysql.connector.connect( host="localhost", user="root", password="root123", database="Lazyroar") # Create a cursor object mycursor = mydb.cursor() # Execute the query query = "SELECT count(*) AS New_column_name FROM information_schema.columns where table_name = 'Persons';"mycursor.execute(query) myresult = mycursor.fetchall() print(myresult[-1][-1]) # Close database connection mydb.close() |
Output;
5
Example 2:
In this example we are using this database with the following query;
Python3
# Establish connection to MySQL database import mysql.connector mydb = mysql.connector.connect( host="localhost", user="root", password="root123", database="Lazyroar") # Create a cursor object mycursor = mydb.cursor() # Execute the query query = "SELECT count(*) AS New_column_name FROM information_schema.columns where table_name = 'Salary';"mycursor.execute(query) myresult = mycursor.fetchall() print(myresult[-1][-1]) # Close database connection mydb.close() |
Output:
2
