fix month yield

schema/queries01.sql

@@ -41,7 +41,7 @@ with
                 date_trunc('day', min(time)) as day
             from pv_power_measurement_t
             where 
-                time between date_trunc('month', time) and now()
+                time between date_trunc('month', now()) and now()
     ),
     first_value as (
         select 
@@ -64,6 +64,9 @@ with
             group by interval
     )
     select
+        (select day from first_day_in_month) as v1,
+        (select energy from first_value) as v2,
+        (select energy from last_value) as v3,
         to_char((select day from first_day_in_month), 'Month') as period_value,
         'Month' as period_name,
         (select energy from last_value) - (select energy from first_value) as yield;