What are some practical use cases for SQL joins?

What are some practical use cases for SQL joins?

SQL joins are used to combine records from two or more tables based on related columns. For example, you can use joins to retrieve customer orders along with customer details.

Can you explain the difference between INNER JOIN and LEFT JOIN?

Sure! An INNER JOIN returns only the rows that have matching values in both tables, while a LEFT JOIN returns all rows from the left table and the matched rows from the right table, filling in NULLs for non-matching rows.

What are some scenarios where I would use a RIGHT JOIN?

A RIGHT JOIN is useful when you want to retrieve all records from the right table and the matching records from the left table. For instance, if you want to list all products and their sales, including products that haven't been sold.

Can you give an example of a SQL query using a JOIN?

Certainly! Here's an example: SELECT customers.name, orders.amount FROM customers INNER JOIN orders ON customers.id = orders.customer_id; This retrieves customer names along with their order amounts.