diff --git a/itikhomirov/clickhouse/Pet_project.sql b/itikhomirov/clickhouse/Pet_project.sql
index ff94706..2f2f1e7 100644
--- a/itikhomirov/clickhouse/Pet_project.sql
+++ b/itikhomirov/clickhouse/Pet_project.sql
@@ -13,7 +13,7 @@ CREATE TABLE pet.core_user (
     name String,
     age Int32,
     email String,
-    registration_date Date
+    registration_date DateTime64(3, 'UTC')
 )
 ENGINE = MergeTree
 ORDER BY user_id;
@@ -43,7 +43,7 @@ CREATE TABLE pet.core_fact_lesson_views (
     user_id Int32, 
     lesson_id Int32,
     course_id Int32,
-    viewed_at DateTime64(3)
+    viewed_at DateTime64(3, 'UTC')
 )
 ENGINE = MergeTree
 ORDER BY user_id;
@@ -51,10 +51,9 @@ ORDER BY user_id;
 -- Таблица enrollments из GP
 
 CREATE TABLE pet.core_enrollments (
-	id Int32,
     user_id Int32,
     course_id Int32,
-    enrolled_at Date
+    enrolled_at DateTime64(3, 'UTC')
 )
 ENGINE = MergeTree
 ORDER BY user_id;
@@ -122,3 +121,162 @@ GROUP BY
     flv.course_id,
     c.title;
 
+-- Задание 3: Создай витрину inactive_users_summary
+
+-- Создаем пустую таблицу inactive_users_summary(структуру витрины)
+
+CREATE TABLE pet.inactive_users_summary
+(
+    user_id UInt32,
+    name String,
+    email String,
+    age UInt8,
+    registered_courses_count UInt32,
+    registration_date DateTime64(3, 'UTC')
+)
+ENGINE = MergeTree
+ORDER BY (user_id);
+
+-- Создаем Materialized View
+
+CREATE MATERIALIZED VIEW pet.mv_inactive_users_summary
+TO pet.inactive_users_summary
+AS
+SELECT
+    u.user_id AS user_id,
+    u.name AS name,
+    u.email AS email,
+    u.age AS age,
+    countDistinct(e.course_id) AS registered_courses_count,
+    u.registration_date AS registration_date
+FROM pet.core_user AS u
+LEFT JOIN pet.core_enrollments AS e ON u.user_id = e.user_id
+WHERE u.user_id NOT IN (
+    SELECT DISTINCT user_id
+    FROM pet.core_fact_lesson_views
+)
+GROUP BY
+    u.user_id,
+    u.name,
+    u.email,
+    u.age,
+    u.registration_date;
+
+-- Вставляем данные в таблицу inactive_users_summary
+
+INSERT INTO pet.inactive_users_summary
+SELECT
+    u.user_id,
+    u.name,
+    u.email,
+    u.age,
+    countDistinct(e.course_id) AS registered_courses_count,
+    u.registration_date
+FROM pet.core_user AS u
+LEFT JOIN pet.core_enrollments AS e
+    ON u.user_id = e.user_id
+WHERE u.user_id NOT IN (               
+    SELECT DISTINCT user_id
+    FROM pet.core_fact_lesson_views
+)
+/*
+ * этот подзапрос WHERE... просто выбрасывает всех, кто хоть раз что‑то посмотрел,
+ * независимо от количества строк и особенностей JOIN’ов.
+ */
+GROUP BY
+    u.user_id,
+    u.name,
+    u.email,
+    u.age,
+    u.registration_date;
+
+
+-- Задание 4: Создай витрину course_completion_rate
+
+CREATE TABLE pet.course_completion_rate
+(
+    user_id          UInt32,
+    user_name        String,
+    course_id        UInt32,
+    course_title     String,
+    lessons_in_course UInt32,
+    lessons_viewed    UInt32,
+    completion_rate   Float32
+)
+ENGINE = MergeTree
+ORDER BY (user_id, course_id);
+
+-- Создаем Materialized View
+
+CREATE MATERIALIZED VIEW pet.mv_course_completion_rate
+TO pet.course_completion_rate
+AS
+SELECT
+    u.user_id AS user_id,
+    u.name AS user_name,
+    c.course_id AS course_id,
+    c.title AS course_title,
+    countDistinct(l.lesson_id) AS lessons_in_course,
+    countDistinct(flv.lesson_id) AS lessons_viewed,
+    if(countDistinct(l.lesson_id) = 0,0,
+       round(countDistinct(flv.lesson_id) * 1.0 / countDistinct(l.lesson_id),2)
+    ) AS completion_rate
+FROM pet.core_enrollments AS e
+JOIN pet.core_user      AS u ON e.user_id   = u.user_id
+JOIN pet.core_course    AS c ON e.course_id = c.course_id
+JOIN pet.core_lesson    AS l ON c.course_id = l.course_id
+LEFT JOIN pet.core_fact_lesson_views AS flv
+       ON flv.user_id   = e.user_id
+      AND flv.course_id = e.course_id
+GROUP BY
+    u.user_id,
+    u.name,
+    c.course_id,
+    c.title;
+
+-- Вставляем данные в таблицу pet.course_completion_rate
+INSERT INTO pet.course_completion_rate
+-- Создаем две временные таблицы:
+-- 1) Сколько уроков в каждом курсе
+WITH
+lessons_per_course AS (
+    SELECT
+        course_id,
+        countDistinct(lesson_id) AS lessons_in_course
+    FROM pet.core_lesson
+    GROUP BY course_id
+),
+-- 2) Сколько уроков каждого курса посмотрел пользователь
+views_per_user_course AS (
+    SELECT
+        user_id,
+        course_id,
+        countDistinct(lesson_id) AS lessons_viewed
+    FROM pet.core_fact_lesson_views
+    GROUP BY user_id, course_id
+)
+-- Основной запрос
+SELECT
+    u.user_id,
+    u.name AS user_name,
+    c.course_id,
+    c.title AS course_title,
+    lpc.lessons_in_course,
+    coalesce(vpc.lessons_viewed, 0) AS lessons_viewed,
+    ROUND(
+        COALESCE(
+            NULLIF(coalesce(vpc.lessons_viewed, 0) * 1.0, 0)
+            / NULLIF(lpc.lessons_in_course * 1.0, 0),
+            0
+        ),
+        2
+    ) AS completion_rate
+FROM pet.core_user AS u
+JOIN pet.core_enrollments AS e ON u.user_id  = e.user_id
+JOIN pet.core_course AS c ON e.course_id = c.course_id
+JOIN lessons_per_course AS lpc ON c.course_id = lpc.course_id
+LEFT JOIN views_per_user_course AS vpc ON vpc.user_id   = u.user_id AND vpc.course_id = c.course_id
+ORDER BY
+    u.user_id,
+    c.course_id;
+
diff --git a/itikhomirov/clickhouse/Pet_project_Step 2.3.png b/itikhomirov/clickhouse/Pet_project_Step 2.3.png
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diff --git a/itikhomirov/clickhouse/Pet_project_Step 2.4.png b/itikhomirov/clickhouse/Pet_project_Step 2.4.png
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