: These can block common "UNION ALL" patterns before they ever reach your database.
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#
: This is the "injection" part. It tells the database to append a second result set (containing the number 34 ) to the first (empty) result set. If the page then displays "34", the attacker knows the site is vulnerable and that they can use this spot to extract sensitive data like usernames or passwords. : These can block common "UNION ALL" patterns
: Ensure that if a field expects a number, it only receives a number. It tells the database to append a second
: This is the most effective defense.
: In MySQL, this character marks the rest of the query as a comment, effectively "breaking" any remaining original code that might cause the attack to fail. Why are you seeing this?