Anton
29 lines
790 B
SQL
29 lines
790 B
SQL
DROP MATERIALIZED VIEW IF EXISTS dm.lesson_popularity_summary;
|
|
CREATE MATERIALIZED VIEW dm.lesson_popularity_summary
|
|
DISTRIBUTED BY (lesson_id)
|
|
AS
|
|
select
|
|
t1.lesson_id as lesson_id,
|
|
dl.title as lesson_title,
|
|
t1.course_id as course_id,
|
|
dc.title as course_title,
|
|
t1.total_views as total_views,
|
|
t1.unique_users as unique_users,
|
|
t1.first_view as first_view,
|
|
t1.last_view as last_view
|
|
from
|
|
(select
|
|
flv.lesson_id,
|
|
flv.course_id,
|
|
COUNT(*) as total_views,
|
|
COUNT(distinct flv.user_id) as unique_users,
|
|
MIN(flv.viewed_at) as first_view,
|
|
MAX(flv.viewed_at) as last_view
|
|
from
|
|
core.fact_lesson_views flv
|
|
group by
|
|
flv.lesson_id,
|
|
flv.course_id
|
|
) as t1
|
|
right join core.dim_lesson dl on dl.lesson_id = t1.lesson_id
|
|
left join core.dim_course dc on t1.course_id = dc.course_id; |