added safety div with nullif

2026-01-06 16:36:58 +07:00
parent c1d1796679
commit 88db25d7d5
3 changed files with 4 additions and 4 deletions
@@ -19,7 +19,7 @@ with enrollment_counts as(
 	group by user_id
 	order by user_id
 ), engagment_rate as (
-	select tl.user_id, round(v.viewed_lessons_count*100.0/total_lessons, 2) as engagment_rate
+	select tl.user_id, round(v.viewed_lessons_count*100.0/nullif(total_lessons), 2) as engagment_rate
 	from total_lessons tl
 	join views v using(user_id) 
 )