Validating and sanitizing all user-provided data is a secondary layer of defense. If you'd like to dive deeper, I can:
The string you provided is a classic attempt. Validating and sanitizing all user-provided data is a
Modern applications prevent these attacks using (Prepared Statements). Input is treated as data , not executable code. Validating and sanitizing all user-provided data is a
Discuss the difference between and Blind SQL injection. Validating and sanitizing all user-provided data is a
: Comments out the rest of the legitimate SQL code so it doesn't execute and cause an error.