53 lines
1.6 KiB
SQL
53 lines
1.6 KiB
SQL
CREATE TABLE IF NOT EXISTS users (
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user_id SERIAL PRIMARY KEY,
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first_name varchar(64) NOT NULL,
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last_name varchar(64) NOT NULL,
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password varchar(120) NOT NULL,
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email varchar(64) NOT NULL,
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address varchar(64) NOT NULL,
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role varchar(64) NOT NULL CHECK ( role in ('student', 'parent', 'teacher') )
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);
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CREATE TABLE IF NOT EXISTS groups (
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group_id SERIAL PRIMARY KEY,
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name varchar(64) NOT NULL UNIQUE,
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leaveable boolean DEFAULT TRUE,
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parents_can_post boolean DEFAULT FALSE
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);
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CREATE TABLE IF NOT EXISTS threads (
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thread_id SERIAL PRIMARY KEY,
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title varchar(64) NOT NULL,
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group_id integer REFERENCES groups(group_id),
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creator_id integer REFERENCES users(user_id)
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);
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CREATE TABLE IF NOT EXISTS messages (
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message_id SERIAL PRIMARY KEY,
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content text NOT NULL,
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thread_id integer REFERENCES threads(thread_id),
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author_id integer REFERENCES users(user_id),
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created_date timestamp NOT NULL DEFAULT now()
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);
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CREATE TABLE IF NOT EXISTS posts (
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post_id SERIAL PRIMARY KEY,
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group_id integer REFERENCES groups(group_id),
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author_id integer REFERENCES users(user_id),
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title varchar(64) NOT NULL,
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content text NOT NULL,
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created_date timestamp NOT NULL DEFAULT now()
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);
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-- Relationships
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CREATE TABLE IF NOT EXISTS users_threads (
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user_id integer REFERENCES users(user_id),
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thread_id integer REFERENCES threads(thread_id),
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PRIMARY KEY (user_id, thread_id)
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);
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CREATE TABLE IF NOT EXISTS users_groups (
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user_id integer REFERENCES users(user_id),
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group_id integer REFERENCES groups(group_id),
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PRIMARY KEY (user_id, group_id)
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); |