diff --git a/src/data/roadmaps/postgresql-dba/content/set-operations@kOwhnSZBwIhIbIsoAXQ50.md b/src/data/roadmaps/postgresql-dba/content/set-operations@kOwhnSZBwIhIbIsoAXQ50.md
index 770f88a90..27ddba034 100644
--- a/src/data/roadmaps/postgresql-dba/content/set-operations@kOwhnSZBwIhIbIsoAXQ50.md
+++ b/src/data/roadmaps/postgresql-dba/content/set-operations@kOwhnSZBwIhIbIsoAXQ50.md
@@ -6,4 +6,5 @@ Learn more from the following resources:
 
 - [@official@Combining Queries](https://www.postgresql.org/docs/current/queries-union.html)
 - [@article@PostgreSQL UNION Operator](https://www.postgresqltutorial.com/postgresql-tutorial/postgresql-union/)
-- [@article@PostgreSQL INTERSECT Operator](https://www.postgresqltutorial.com/postgresql-tutorial/postgresql-intersect/)
\ No newline at end of file
+- [@article@PostgreSQL INTERSECT Operator](https://www.postgresqltutorial.com/postgresql-tutorial/postgresql-intersect/)
+- [@article@PostgreSQL EXCEPT Operator](https://www.postgresqltutorial.com/postgresql-tutorial/postgresql-except/)