31 lines
735 B
MySQL
31 lines
735 B
MySQL
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-- Add migration script here
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CREATE TABLE Users (
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id SERIAL PRIMARY KEY,
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username VARCHAR(100) UNIQUE NOT NULL
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);
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CREATE TABLE Profiles (
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id SERIAL PRIMARY KEY,
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user_id INT UNIQUE NOT NULL,
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bio TEXT,
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display_name VARCHAR(100),
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FOREIGN KEY (user_id) REFERENCES Users(id)
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);
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CREATE TABLE Comments (
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id SERIAL PRIMARY KEY,
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author_id INT NOT NULL,
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content TEXT NOT NULL,
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FOREIGN KEY (author_id) REFERENCES Users(id)
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);
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CREATE TABLE Followers (
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id SERIAL PRIMARY KEY,
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followed INT NOT NULL,
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follower INT NOT NULL,
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FOREIGN KEY (followed) REFERENCES Users(id) ON DELETE CASCADE,
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FOREIGN KEY (follower) REFERENCES Users(id) ON DELETE CASCADE,
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CHECK (followed != follower),
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UNIQUE (followed, follower)
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);
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