diff --git a/src/main/resources/done.sql b/src/main/resources/done.sql
index bff3ce2..b2b7097 100644
--- a/src/main/resources/done.sql
+++ b/src/main/resources/done.sql
@@ -40,7 +40,7 @@ create table done.t_done (
 
 create view done.v_billing as
 with x(total) as (
-  select count(1) as count
+  select coalesce(nullif(count(1), 0), 1) as count
   from done.t_done
 ) select b.pk, b.name, b.shortcut, b.csskey,
          round(((count(db.*)::double precision / x.total::double precision) * 100::double precision)::numeric, 2) AS percent_usage
@@ -137,7 +137,7 @@ order by login, workday, project_name, module_name, job_name;
 
 create view done.v_job as
 with x(total) as (
-  select count(1) as count
+  select coalesce(nullif(count(1), 0), 1) as count
   from done.t_done
 ) select j.pk, j.name,
          round(((count(dj.*)::double precision / x.total::double precision) * 100::double precision)::numeric, 2) as percent_usage
@@ -149,7 +149,7 @@ with x(total) as (
 
 create view done.v_module as
 with x(total) as (
-  select count(1) as count
+  select coalesce(nullif(count(1), 0), 1) as count
   from done.t_done
 ) select m.pk, m.name,
          round(((count(dm.*)::double precision / x.total::double precision) * 100::double precision)::numeric, 2) as percent_usage
@@ -161,7 +161,7 @@ with x(total) as (
 
 create view done.v_project as
 with x(total) as (
-  select count(1) as count
+  select coalesce(nullif(count(1), 0), 1) as count
   from done.t_done
 ) select p.pk, p.name,
          round(((count(dp.*)::double precision / x.total::double precision) * 100::double precision)::numeric, 2) as percent_usage