Are you researching this for or looking for a specific type of defense mechanism ?
: Offers interactive labs specifically for UNION based SQL injection.
(ACM Digital Library).
Use -4215) to close an existing integer-based filter or function.
If you want to practice or learn about this in a controlled environment: -4215) UNION ALL SELECT 34,34#
: The industry standard for web security risks, explaining why injection remains a top threat.
This is one of the most cited papers in the field. It provides a comprehensive taxonomy of different SQL injection types, including UNION -based attacks like the one in your query. Are you researching this for or looking for
by Halfond, Viegas, and Orso (IEEE Xplore).