This tells the database to combine the results of the original query with a new query created by the attacker [3, 4].
Sanitize inputs to reject special characters like ) , # , and SQL keywords in fields where they don't belong [8]. -1740) UNION ALL SELECT 34,34,34#
This is an attempt to "break out" of the original query logic by providing a non-existent ID and closing any open parentheses. This tells the database to combine the results
Implement parameterized queries immediately. This treats all user input as data, never as executable code [6, 7]. Implement parameterized queries immediately
This string is a classic payload designed to test for vulnerabilities in a database [1, 2]. Specifically, it uses a UNION ALL SELECT statement to attempt to append "junk" data (the number 34) to the results of an existing query [3]. Security Incident Report: SQL Injection Probe 1. Incident Overview