{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 — Direct

It uses functions like CONCAT and GROUP BY to intentionally trigger a duplicate-key error. The database's error message will then "leak" the information hidden inside the query (in this case, the results of the SELECT 1 or version info) back to the attacker's screen.

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. It uses functions like CONCAT and GROUP BY

It looks like your query contains some SQL injection syntax ( SELECT COUNT , CONCAT , INFORMATION_SCHEMA ). If you're looking for an on how these types of database queries work—specifically regarding web security and SQL injection (SQLi) —I can certainly help with that. What is this code? If a user is searching for a "Keyword,"

If a website's search bar or URL parameter isn't properly "sanitized," an attacker can use this method to: (e.g., MySQL, PostgreSQL). Extract table names and column structures. What is this code

The attacker isn't trying to delete data yet; they are trying to "fingerprint" the database.

If you are a developer, you can stop these attacks using three main methods: