fix comments

mdrozdov/clickhouse/data_types.sql

@@ -8,11 +8,11 @@
 	select 
 	    user_id,
 	    toDecimal64OrNull(balance, 2) as balance,
-	    toTimeDate64OrNull(created_at, 3) as created_at
+	    toDateTime64OrNull(created_at, 3) as created_at
 	from raw_data
 	where
 	    toDecimal64OrNull(balance, 2) is not null and
-	    toTimeDate64OrNull(created_at, 3) is not null
+	    toDateTime64OrNull(created_at, 3) is not null
 	
 	-- task 2 (failed)
 	CREATE TABLE events (
@@ -23,7 +23,7 @@
 	
 	select 
 	    event_id,
-	    toStartOfHour(toDateTimeOrNull(concatWithSeparator(' ', events_date, events_time))) 
+	    toStartOfHour(toDateTimeOrNull(concatWithSeparator(' ', event_date, event_time))) 
 	from events
 	where
 	    toDateOrNull(event_date) is not null and toTimeOrNull(event_time) is not null
@@ -57,5 +57,5 @@
 	    avg(value) as avg_value
 	from sensor_data
 	where
-	    toDecimal64OrNull(value, 2) is not null
+	    value is not null
 	group by status

mdrozdov/clickhouse/joins.sql

@@ -65,7 +65,7 @@
 		'/clickhouse/tables/{shard}/mdrozdov/orders',
 		'{replica}'
 	)
-	order by size
+	order by (symbol, time)
 	
 	insert into mdrozdov.orders values
 	('2025-07-17 10:00:30',	'AAPL',	50),
@@ -97,7 +97,7 @@
 		bl.user_id,
 		u.name,
 		bl.event_time,
-		bl.event_type, 
+		bl.event_type 
 	from big_logs bl
 	any left join users u
 		using(user_id)

mdrozdov/clickhouse/merge_tree_family.sql

@@ -18,7 +18,7 @@
 	Order by id;
 	
 	-- region_sales table
-	create table region_sales(
+	create table mdrozdov.region_sales(
 		region String,
 		date Date,
 		sales UInt64

mdrozdov/clickhouse/queries.sql

@@ -1,4 +1,4 @@
-CREATE TABLE users (
+CREATE TABLE mdrozdov.users (
 		user_id Int,
 		name 	String,
 		age 	Int,
@@ -113,10 +113,10 @@ CREATE TABLE users (
 	from mdrozdov.events
 	--3) да, поддерживается, но не обязательно для коммулятивного суммирования строк
 	--4-6) Сделай WITH recent_events AS (...) — все события за последние 24 часа.
-	with recent_events AS (
+	with mdrozdov.recent_events AS (
 		select *
 		from mdrozdov.events
-		where event_time >= '2025-07-18'::DATE - interval '1 day'
+		where event_time >= toDateTime('2025-07-18') - interval 1 day
 	), category_list as (
 		select 'click' as event_type, 'interaction' as category
 		union all

mdrozdov/clickhouse/secondary_index.sql

@@ -40,7 +40,7 @@ engine = ReplicatedMergeTree(
 order by id
 
 alter table mdrozdov.clicks
-add index idx_country type set(100) GRANULARITY 2
+add index idx_country country type set(100) GRANULARITY 2
 
 Explain
     select *
@@ -59,7 +59,7 @@ engine = ReplicatedMergeTree(
 	)
 order by id
 
-ALTER TABLE users 
+ALTER TABLE mdrozdov.users 
 ADD INDEX idx_email email TYPE bloom_filter(0.01) GRANULARITY 2;
 
-SELECT * FROM users WHERE email = 'alice@mail.com';
+SELECT * FROM mdrozdov.users WHERE email = 'alice@mail.com';

mdrozdov/clickhouse/view_distribute.sql

@@ -23,6 +23,7 @@
 	
 	--task 3
 	CREATE MATERIALIZED VIEW 
+		to 
 	    ENGINE = SummingMergeTree
 	    order by date
 	    mv_clicks_per_day AS
@@ -30,4 +31,4 @@
 	    toDate(event_time) as date, 
 	    count(*) as total_clicks
 	from raw_events
-	group date
+	group by date

mdrozdov/greenplum/core_layer.sql

@@ -76,14 +76,6 @@
 	    course_id::INT
 	FROM raw.lessons;
 	
-	INSERT INTO core.dim_lesson (lesson_id, title, duration_min, course_id)
-	SELECT DISTINCT
-	    id::INT,
-	    title::TEXT,
-	    duration_min::INT,
-	    course_id::INT
-	FROM raw.lessons;
-	
 	-- Заполнение таблицы фактов
 	insert into core.fact_lesson_views (user_id, lesson_id, course_id, viewed_at)
 	select
@@ -94,16 +86,7 @@
 	from raw.lessons_views lw
 	join raw.lessons l on lw.lesson_id = l.id;
 	
-	insert into core.enrollments (user_id, lesson_id, course_id, viewed_at)
-	select
-		lw.user_id,
-		lw.lesson_id,
-		l.course_id,
-		lw.viewed_at
-	from raw.lessons_views lw
-	join raw.lessons l on lw.lesson_id = l.id;
-	
-	insert into enrollments (user_id, course_id, enrolled_at)
+	insert into core.enrollments (user_id, course_id, enrolled_at)
 	select
 		user_id,
 		course_id,