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how to refresh a database connection in python mysql so the database data refreshes if it was changed?

+2 votes
asked Mar 9, 2023 by Fkz1t (140 points)
how to refresh a database connection in mysql so the database data refreshes if it was changed?

--python--

2 Answers

0 votes
answered Aug 27, 2023 by Soumya Chakraborty (140 points)

import mysql.connector

# Establish the initial connection
connection = mysql.connector.connect(
    host="your_host",
    user="your_username",
    password="your_password",
    database="your_database"
)

# Perform database operations using the connection
# ...

# Close the existing connection
connection.close()

# Create a new connection to refresh the data
new_connection = mysql.connector.connect(
    host="your_host",
    user="your_username",
    password="your_password",
    database="your_database"
)

# Perform new database operations using the new connection
# ...

# Close the new connection when you're done
new_connection.close(

0 votes
answered Aug 27, 2023 by Pallav Sharma (140 points)

Database connections in Python are typically short-lived, so you don't need to manually refresh them in most cases. Instead, you create a new connection when you need to interact with the database.

Here's an example of how you can create a new MySQL database connection using the

Mysql-connector-python library:

Now the code driven,

import Mysqlconnector

# Create a new database connection
     def create_connection():
           try:
        connection = mysql.connector.connect(
            host="your_host",
            user="your_username",
            password="your_password",
            database="your_database"
        )
        return connection
    except mysql.connector.Error as err:
        print(f"Error: {err}")
        return None

# Usage example
connection = create_connection()

if connection is not None:
    try:
        # Perform database operations here
        cursor = connection.cursor()
        cursor.execute("SELECT * FROM your_table")
        data = cursor.fetchall()

        for row in data:
            print(row)

        # Close the cursor and the connection when done
        cursor.close()
        connection.close()
    except mysql.connector.Error as err:
        print(f"Error: {err}")
else:
    print("Failed to establish a database connection.")

In this example, a new connection is created each time you need to interact with the database. This approach ensures that you always have a fresh connection to the database without the need for explicit "refreshing."

If your goal is to check for changes in the data periodically, you would typically query the database at regular intervals to see if any updates are needed rather than refreshing the connection itself. You could use a scheduler like cron (on Unix-like systems) or schedule (a Python library) to trigger database queries at specified intervals.

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