diff --git a/transaction_range.pgsql b/transaction_range.pgsql
index b4f469e..c55a083 100644
--- a/transaction_range.pgsql
+++ b/transaction_range.pgsql
@@ -10,5 +10,8 @@ FROM
         s.srce = t.srce
     LEFT JOIN LATERAL JSONB_ARRAY_ELEMENTS_TEXT(defn->'unique_constraint'->'fields') WITH ORDINALITY ae(e, rn) ON TRUE
 GROUP BY
+    t.srce
+    ,(ae.e::text[])[1]
+ORDER BY
     t.srce
     ,(ae.e::text[])[1]
\ No newline at end of file