fixed mistakes

dmedvedev/4.5.greenplum_pet_project.sql

@@ -1,48 +1,43 @@
 --Добавление raw-таблиц в GREENPLUM
 CREATE TABLE raw.pet_users
 (
-    id INT PRIMARY KEY NOT NULL,
-    name VARCHAR(50) NOT NULL,
+    id INT,
+    name VARCHAR(50),
     age INT,
-    email VARCHAR(100) NOT NULL,
-    registration_date DATE NOT NULL
+    email VARCHAR(100),
+    registration_date DATE
 );
 
 CREATE TABLE raw.pet_courses
 (
-    id INT PRIMARY KEY NOT NULL,
-    title VARCHAR(100) NOT NULL,
-    category VARCHAR(50) NOT NULL,
-    created_at DATE NOT NULL
+    id INT,
+    title VARCHAR(100),
+    category VARCHAR(50),
+    created_at DATE
 );
 
 CREATE TABLE raw.pet_lessons
 (
-    id INT PRIMARY KEY NOT NULL,
-    course_id INT NOT NULL,
-    FOREIGN KEY (course_id) REFERENCES raw.pet_courses (id),
+    id INT,
+    course_id INT,
     title VARCHAR(50),
-    duration_min INT NOT NULL
+    duration_min INT
 );
 
 CREATE TABLE raw.pet_enrollments
 (
-    id INT PRIMARY KEY NOT NULL,
-    user_id INT NOT NULL,
-    FOREIGN KEY (user_id) REFERENCES raw.pet_users (id),
-    course_id INT NOT NULL,
-    FOREIGN KEY (course_id) REFERENCES raw.pet_courses (id),
-    enrolled_at DATE NOT NULL
+    id INT,
+    user_id INT,
+    course_id INT,
+    enrolled_at DATE
 );
 
 CREATE TABLE raw.pet_lesson_views
 (
-    id INT PRIMARY KEY NOT NULL,
-    user_id INT NOT NULL,
-    FOREIGN KEY (user_id) REFERENCES raw.pet_users (id),
-    lesson_id INT NOT NULL,
-    FOREIGN KEY(lesson_id) REFERENCES raw.pet_lessons (id),
-    viewed_at TIMESTAMPTZ NOT NULL
+    id INT,
+    user_id INT,
+    lesson_id INT,
+    viewed_at TIMESTAMPTZ
 );
 
 --Создание core-таблиц (измерений - dimension) в GREENPLUM
@@ -105,12 +100,12 @@ CREATE TABLE core.enrollments
 INSERT INTO core.dim_user
     (user_id, name, age, email, registration_date)
 SELECT DISTINCT
-    user_id::INT,
+    id::INT,
     name::TEXT,
     age::INT,
     email::TEXT,
     registration_date::DATE
-FROM raw.users;
+FROM raw.pet_users;
 
 --переброска для dim_course
 INSERT INTO core.dim_course