: Ensure that if a field expects a number, it only receives a number.
: This is the most effective defense.
: These can block common "UNION ALL" patterns before they ever reach your database. -1697 UNION ALL SELECT 34#
The string you've provided, "-1697 UNION ALL SELECT 34#" , is a classic example of a payload. This specific syntax is often used by security researchers or attackers to test if a database-driven website is vulnerable to unauthorized data access. What this string does: : Ensure that if a field expects a
To prevent these types of attacks, developers should never insert user input directly into SQL queries. Instead, you should use: "-1697 UNION ALL SELECT 34#"