Mega'and/**/extractvalue(1,concat(char(126),md5(1002059835)))and' ✪

What is SQL Injection? Tutorial & Examples | Web Security Academy

: A function used to query XML data. If given an invalid path (which this payload provides), it throws a database error. What is SQL Injection

: Attempts to balance the trailing single quote of the original query to prevent a syntax error that might stop the script from running. Context of Use : Attempts to balance the trailing single quote

: char(126) is the tilde character ( ~ ). The payload attaches this to the start of the data so that the resulting error message clearly displays the extracted value. This specific payload uses an technique targeting MySQL

This specific payload uses an technique targeting MySQL or MariaDB databases.

: Calculates the MD5 hash of a specific number. In security testing, this is used as a "canary"—if the database error message displays the calculated hash, the tester knows the injection was successful.

The string you've provided is an example of a used in automated vulnerability scanning or attacks. It is not a legitimate "proper feature" of a software application; rather, it is designed to exploit security flaws in a database's error-handling mechanism. Breakdown of the Payload