Can I protect against SQL injection by escaping single-quote and surrounding user input with single-quotes?

Question

I realize that parameterized SQL queries is the optimal way to sanitize user input when building queries that contain user input, but I\'m wondering what is wrong with takin

Answer 1

Input sanitation is not something you want to half-ass. Use your whole ass. Use regular expressions on text fields. TryCast your numerics to the proper numeric type, and report a validation error if it doesn't work. It is very easy to search for attack patterns in your input, such as ' --. Assume all input from the user is hostile.