fixed according last comments

skonev/greenplum/STEP4.3_dm.course_completion_rate.sql

@@ -1,11 +1,11 @@
-/# 
+/* 
 - ВИТРИНА ДЛЯ АНАЛИЗА КОНВЕРСИИ ПРОХОЖДЕНИЯ КУРСА ПОЛЬЗОВАТЕЛЯМИ
 - ИТОГОВОЕ РАСПРЕДЕЛЕНИЕ ПО (user_id, course_id)
-#/
+*/
 
 CREATE MATERIALIZED VIEW dm.course_completion_rate AS
 WITH t1 AS (
-SELECT DISTINCT
+SELECT
 	e.user_id,
 	du.name AS user_name,
 	e.course_id, 
@@ -21,7 +21,7 @@ t2 AS (
 SELECT 
 	user_id,
 	course_id,
-	COUNT(lesson_id) AS lessons_viewed
+	COUNT(DISTINCT lesson_id) AS lessons_viewed
 FROM core.fact_lesson_views
 GROUP BY user_id, course_id
 )