dmitry_medvedev/homework

homework, pet project DE Dmitry_Medvedev #1

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										dmedvedev/11.2 Pet project Effective courses.sql
									
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				@@ -4,7 +4,7 @@ CREATE MATERIALIZED VIEW course_summary AS

				WITH unique_users AS (

					SELECT 

						pe.course_id,

						COUNT(*) AS unique_users

						COUNT(DISTINCT pe.user_id) AS unique_users

					FROM pet_enrollments pe

					GROUP BY pe.course_id 

					ORDER BY pe.course_id