diff --git a/zack/origins-by-visit.sql b/zack/origins-by-visit.sql
index 1f4f07e..1965518 100644
--- a/zack/origins-by-visit.sql
+++ b/zack/origins-by-visit.sql
@@ -1,23 +1,26 @@
 -- compute the number of visits that each SWH origin went through
 -- report them grouped by number of visits, in decreasing order
+--
+-- DB: softwareheritage
+
 with origin_visits as (
      select origin, count(visit) as visits
      from origin_visit
      group by origin
      )
 select count(origin), visits
 from origin_visits
 group by visits
 order by visits desc;
 
 -- sample output
 -- 
 -- count   | visits
 -- --------+--------
 --       1 |      7
 --       7 |      6
 --    2841 |      5
 -- 2672450 |      4
 -- 8121753 |      3
 --  432803 |      2
 --  569244 |      1