Jānis Kacēns
60 lines
1.8 KiB
SQL
60 lines
1.8 KiB
SQL
CREATE TABLE IF NOT EXISTS users (
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id INTEGER PRIMARY KEY,
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name TEXT UNIQUE NOT NULL,
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password_hash TEXT NOT NULL,
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP
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);
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CREATE TABLE IF NOT EXISTS questions (
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id TEXT PRIMARY KEY,
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text TEXT NOT NULL,
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source TEXT,
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP
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);
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CREATE TABLE IF NOT EXISTS answers (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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question_id TEXT NOT NULL REFERENCES questions(id) ON DELETE CASCADE,
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text TEXT NOT NULL,
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is_correct BOOLEAN NOT NULL,
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position INTEGER NOT NULL
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);
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CREATE TABLE IF NOT EXISTS tests (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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user_id INTEGER NOT NULL REFERENCES users(id),
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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completed_at DATETIME,
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n_questions INTEGER NOT NULL,
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question_ids TEXT NOT NULL
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);
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CREATE TABLE IF NOT EXISTS test_answers (
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test_id INTEGER NOT NULL REFERENCES tests(id) ON DELETE CASCADE,
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question_id TEXT NOT NULL REFERENCES questions(id),
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selected_answer_id INTEGER REFERENCES answers(id),
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is_correct BOOLEAN,
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answered_at DATETIME,
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PRIMARY KEY (test_id, question_id)
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);
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CREATE TABLE IF NOT EXISTS user_question_stats (
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user_id INTEGER NOT NULL REFERENCES users(id),
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question_id TEXT NOT NULL REFERENCES questions(id) ON DELETE CASCADE,
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times_seen INTEGER NOT NULL DEFAULT 0,
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times_correct INTEGER NOT NULL DEFAULT 0,
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last_seen_at DATETIME,
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PRIMARY KEY (user_id, question_id)
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);
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CREATE TABLE IF NOT EXISTS sessions (
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token TEXT PRIMARY KEY,
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data BLOB NOT NULL,
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expiry INTEGER NOT NULL
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);
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CREATE INDEX IF NOT EXISTS idx_sessions_expiry ON sessions(expiry);
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CREATE INDEX IF NOT EXISTS idx_test_answers_test ON test_answers(test_id);
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CREATE INDEX IF NOT EXISTS idx_answers_question ON answers(question_id);
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CREATE INDEX IF NOT EXISTS idx_stats_user ON user_question_stats(user_id);
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