First, you have to the mysql.connector. If you’re uncertain of methods to get this setup, confer with Find out how to Set up MySQL Driver in Python.
Presenting the info
let’s take two (2) tables as an illustration for the code under.
Customers – Desk 1
{ id: 1, title: 'Carl', fav: 254},
{ id: 2, title: 'Emma', fav: 254},
{ id: 3, title: 'John', fav: 255},
{ id: 4, title: 'Hayley', fav:},
{ id: 5, title: 'Andrew', fav:}
Merchandise – Desk 2
{ id: 254, title: 'Chocolate Chip Cookie Dough' },
{ id: 255, title: 'Buttered Pecan' },
{ id: 256, title: 'Cookies & Cream' }
These two tables might be mixed through the use of customers’ fav area and merchandise’ id area.
Find out how to Be part of A number of MySQL Tables collectively in Python
import mysql.connector
mydb = mysql.connector.join(
host = "localhost",
consumer = "username",
password = "YoUrPaSsWoRd",
database = "your_database"
)
mycursor = mydb.cursor()
sql = "SELECT
customers.title AS consumer,
merchandise.title AS favourite
FROM customers
INNER JOIN merchandise ON customers.fav = merchandise.id"
mycursor.execute(sql)
myresult = mycursor.fetchall()
for x in myresult:
print(x)
Within the instance above, Hayley, and Andrew have been excluded from the end result, that’s as a result of INNER JOIN solely exhibits the data the place there’s a match.
What’s a Left Take part MySQL
If you wish to present all customers, even when they don’t have a favourite product, use the LEFT JOIN assertion:
sql = "SELECT
customers.title AS consumer,
merchandise.title AS favourite
FROM customers
LEFT JOIN merchandise ON customers.fav = merchandise.id"
What’s a Proper Take part MySQL
If you wish to return all merchandise, and the customers who’ve them as their favourite, even when no consumer has them as their favourite, use the RIGHT JOIN assertion:
sql = "SELECT
customers.title AS consumer,
merchandise.title AS favourite
FROM customers
RIGHT JOIN merchandise ON customers.fav = merchandise.id"
