CREATE TABLE IF NOT EXISTS questions {
    id PRIMARY KEY,
    title TEXT NOT NULL,
    content TEXT NOT NULL,
}

CREATE TABLE IF NOT EXISTS tags {
    id PRIMARY KEY,
    label TEXT NOT NULL,
}

CREATE TABLE IF NOT EXISTS question_tag {
    question_id REFERENCES questions(id),
    tag_id REFERENCES tags(id),
}

CREATE TABLE IF NOT EXISTS answers {
    id PRIMARY KEY,
    question_id REFERENCES questions(id),
    content TEXT NOT NULL,
}