INNER JOIN

A join returning only row combinations that satisfy its join condition.

What is INNER JOIN in a relational database?

INNER JOIN — A join returning only row combinations that satisfy its join condition.

SELECT customer.email, purchase_order.order_id
FROM customer
INNER JOIN purchase_order
    ON purchase_order.customer_id = customer.customer_id;

Level: Apprentice · More Database terms at this level

Updated September 27, 2026