-4215) Union All Select 34,34# — Working

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.

: The industry standard for web security risks, explaining why injection remains a top threat. -4215) UNION ALL SELECT 34,34#

If you want to practice or learn about this in a controlled environment: This is one of the most cited papers in the field

: While not a paper, this open-source tool is the primary way security researchers automate the detection and exploitation of payloads like yours. -4215) UNION ALL SELECT 34,34#

(ACM Digital Library).

Use -4215) to close an existing integer-based filter or function.