diff --git a/mnoskov/greenplum/Пет проект: DWH/Step_1_project_Initialization.sql b/mnoskov/greenplum/Пет проект: DWH/Step_1_project_Initialization.sql
index f76258c..f542678 100644
--- a/mnoskov/greenplum/Пет проект: DWH/Step_1_project_Initialization.sql	
+++ b/mnoskov/greenplum/Пет проект: DWH/Step_1_project_Initialization.sql	
@@ -4,9 +4,9 @@ CREATE SCHEMA core;
 CREATE SCHEMA dm;
 
 -- 2
--- DROP TABLE IF EXISTS raw.users;
+--DROP TABLE IF EXISTS raw.users;
 CREATE TABLE raw.users (
-	id bigint,
+	id bigint NOT NULL,
 	name varchar(100),
 	age SMALLINT,
 	email varchar(100),
@@ -15,7 +15,7 @@ CREATE TABLE raw.users (
 
 --DROP TABLE IF EXISTS raw.courses;
 CREATE TABLE raw.courses (
-	id bigint,
+	id bigint NOT NULL,
 	title varchar(150),
 	category varchar(50),
 	created_at timestamptz
@@ -23,7 +23,7 @@ CREATE TABLE raw.courses (
 
 --DROP TABLE IF EXISTS raw.lessons;
 CREATE TABLE raw.lessons (
-	id bigint,
+	id bigint NOT NULL,
 	course_id bigint,
 	title varchar(150),
 	duration_min SMALLINT
@@ -31,7 +31,7 @@ CREATE TABLE raw.lessons (
 
 --DROP TABLE IF EXISTS raw.enrollments;
 CREATE TABLE raw.enrollments (
-	id bigint,
+	id bigint NOT NULL,
 	user_id bigint,
 	course_id bigint,
 	enrolled_at timestamptz
@@ -39,7 +39,7 @@ CREATE TABLE raw.enrollments (
 
 --DROP TABLE IF EXISTS raw.lesson_views;
 CREATE TABLE raw.lesson_views (
-	id bigint,
+	id bigint NOT NULL,
 	user_id bigint,
 	lesson_id bigint,
 	viewed_at timestamptz