SQL 인젝션이란?

https://www.cdnetworks.com/ko/cloud-security-blog/what-is-a-sql-injection-attack/#:~:text=SQL%20%EC%9D%B8%EC%A0%9D%EC%85%98%EC%9D%80%20%EA%B3%B5%EA%B2%A9%EC%9E%90%EA%B0%80,%EA%B5%AC%EC%A1%B0%ED%99%94%EB%90%9C%20%EC%BF%BC%EB%A6%AC%20%EC%96%B8%EC%96%B4%EC%9E%85%EB%8B%88%EB%8B%A4.