python-mysqlHow can I create a "Hello World" program in Python using a MySQL database?

This guide will provide a step-by-step approach to creating a “Hello World” program in Python using a MySQL database.

First, you will need to install MySQL server and the MySQL Python connector.

Once the installation is complete, you can connect to the database using the following code:

import mysql.connector

mydb = mysql.connector.connect(
    host="localhost",
    user="yourusername",
    passwd="yourpassword"
)

Next, you will need to create a database and a table. This can be done using the following code:

mycursor = mydb.cursor()

mycursor.execute("CREATE DATABASE hello_world_db")

mycursor.execute("CREATE TABLE hello_world_table (name VARCHAR(255), message VARCHAR(255))")

Then, you will need to insert a record into the table. This can be done using the following code:

sql = "INSERT INTO hello_world_table (name, message) VALUES (%s, %s)"
val = ("John Doe", "Hello World!")

mycursor.execute(sql, val)

mydb.commit()

print(mycursor.rowcount, "record inserted.")

Output example

1 record inserted.

Finally, you can query the database and print the results using the following code:

mycursor.execute("SELECT * FROM hello_world_table")

myresult = mycursor.fetchall()

for x in myresult:
  print(x)

Output example

('John Doe', 'Hello World!')

This is how you can create a “Hello World” program in Python using a MySQL database.

Code explanation

**

• import mysql.connector: This imports the mysql.connector library that is used to connect to the database.
• mydb = mysql.connector.connect(host="localhost", user="yourusername", passwd="yourpassword"): This connects to the database with the given credentials.
• mycursor.execute("CREATE DATABASE hello_world_db"): This creates a new database called hello_world_db.
• mycursor.execute("CREATE TABLE hello_world_table (name VARCHAR(255), message VARCHAR(255))"): This creates a new table called hello_world_table with two columns, name and message.
• sql = "INSERT INTO hello_world_table (name, message) VALUES (%s, %s)": This creates an SQL query to insert a record into the table.
• val = ("John Doe", "Hello World!"): This sets the values for the record to be inserted.
• mycursor.execute(sql, val): This executes the SQL query with the given values.
• mydb.commit(): This commits the changes to the database.
• mycursor.execute("SELECT * FROM hello_world_table"): This executes an SQL query to select all records from the table.
• myresult = mycursor.fetchall(): This fetches all the records from the query.
• for x in myresult: print(x): This prints the records.

## Helpful links

• MySQL Connector/Python Developer Guide
• MySQL Tutorial

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