left join python code example

Example 1: pandas left join

df.merge(df2, left_on = "doc_id", right_on = "doc_num", how = "left")

Example 2: python: left join

new_df = df_1.merge(df_2, on='id', how='left', indicator=True)

Example 3: joins in pandas

pd.merge(product,customer,left_on='Product_name',right_on='Purchased_Product')

Example 4: mysql left join

/*Two tables: CUSTOMERS table and ORDERS table.
ORDERS table contains STATUS attribute.*/
SELECT 
    customers.customerNumber, 
    customerName, 
    orderNumber, 
    status
FROM
    customers
LEFT JOIN orders ON 
    orders.customerNumber = customers.customerNumber;