Skip to content
Related Articles

Related Articles

PostgreSQL – EXISTS Operator

Improve Article
Save Article
  • Last Updated : 28 Aug, 2020
Improve Article
Save Article

In PostgreSQL, the EXISTS operator is used to test for the existence of rose in a subquery.It is generally used with correlated subqueries. If the subquery returns at least one row, the result of EXISTS is true. In case the subquery returns no row, the result is of EXISTS is false.

Syntax: EXISTS (subquery)

For the sake of this article we will be using the sample DVD rental database, which is explained here and can be downloaded by clicking on this link in our examples.

Example 1:

Here we will query for customers who have at least one payment whose amount is greater than 9 USD using the “customer” and “payment” tables of our sample database.

SELECT first_name,
FROM customer c
    (SELECT 1
     FROM payment p
     WHERE p.customer_id = c.customer_id
       AND amount > 9 )
ORDER BY first_name,


Example 2:
Here we will query for films that are not available in the inventory using the “film” and “inventory” tables of our sample database.

SELECT title
FROM film f
    (SELECT 1
     FROM inventory i
     WHERE f.film_id = i.film_id )
ORDER BY title;


My Personal Notes arrow_drop_up
Related Articles

Start Your Coding Journey Now!