https://rein.kr/posts/2009-04-02-%ED%94%84%EB%A1%9C%ED%86%A0%ED%83%80%EC%9E%85-%EC%84%9C%EB%B2%84%EC%97%90-sqlite-%EC%82%AC%EC%9A%A9%ED%95%98%EA%B8%B0/