diff --git a/transaction_range.pgsql b/transaction_range.pgsql
new file mode 100644
index 0000000..b4f469e
--- /dev/null
+++ b/transaction_range.pgsql
@@ -0,0 +1,14 @@
+SELECT
+    t.srce
+    ,(ae.e::text[])[1] unq_constr
+    ,MIN(rec #>> ae.e::text[]) min_text
+    ,COUNT(*) cnt
+    ,MAX(rec #>> ae.e::text[]) max_text
+FROM
+    tps.trans t
+    INNER JOIN tps.srce s ON
+        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]
\ No newline at end of file