{keyword} And (select 8148 From(select Count(*),concat(0x7162717671,(select (elt(8148=8148,1))),0x7171627171,floor(rand(0)*2))x From Information_schema.character_sets Group By X)a)-- Qkgc May 2026

This is the gold standard. Instead of building a query string with user input, you use placeholders ( ? ). The database treats the input strictly as data, never as executable code.

Only allow the types of characters you expect. If a user is searching for a "Keyword," they probably don't need to use parentheses or semicolons. This is the gold standard

like usernames, hashed passwords, or emails. How to Prevent It This is the gold standard

The snippet you provided is a classic example of an attack. This is the gold standard

These are hexadecimal representations of characters (like 'qbqvq') used as delimiters so the attacker can easily spot their "stolen" data in the middle of a messy error message. Why is it dangerous?