SERGEY_KONEV
45 lines
994 B
PL/PgSQL
45 lines
994 B
PL/PgSQL
BEGIN;
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CREATE TABLE SKONEV.users(
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id INT PRIMARY KEY,
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name VARCHAR(100),
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age INT,
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email VARCHAR(255) UNIQUE,
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registration_date DATE NOT NULL
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);
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CREATE TABLE SKONEV.courses(
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id INT PRIMARY KEY,
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title TEXT NOT NULL,
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category VARCHAR(255) CHECK (category IN ('data', 'programming', 'business')),
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created_at DATE NOT NULL
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);
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CREATE TABLE SKONEV.lessons(
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id INT PRIMARY KEY,
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course_id INT NOT NULL,
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FOREIGN KEY (course_id) REFERENCES courses(id),
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title TEXT NOT NULL,
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duration_min INT NOT NULL
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);
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CREATE TABLE SKONEV.enrollments(
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id INT PRIMARY KEY,
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user_id INT NOT NULL,
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FOREIGN KEY (user_id) REFERENCES users(id),
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course_id INT NOT NULL,
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FOREIGN KEY (course_id) REFERENCES courses(id),
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enrolled_at DATE NOT NULL
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);
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CREATE TABLE SKONEV.lesson_views(
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id INT PRIMARY KEY,
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user_id INT NOT NULL,
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FOREIGN KEY (user_id) REFERENCES users(id),
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lesson_id INT NOT NULL,
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FOREIGN KEY (lesson_id) REFERENCES lessons(id),
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viewed_at TIMESTAMP NOT NULL
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);
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COMMIT; |