diff --git a/helmcharts/services/postgresql-migration/configs/migrations/03-obsrv/V6__dataset_alias.sql b/helmcharts/services/postgresql-migration/configs/migrations/03-obsrv/V6__dataset_alias.sql
new file mode 100644
index 00000000..9d2d814a
--- /dev/null
+++ b/helmcharts/services/postgresql-migration/configs/migrations/03-obsrv/V6__dataset_alias.sql
@@ -0,0 +1,2 @@
+ALTER TABLE datasets ADD COLUMN alias TEXT;
+CREATE UNIQUE INDEX unique_alias ON datasets (alias) WHERE alias IS NOT NULL;
\ No newline at end of file