-9718 Union All Select 34,34,34,34,34,34,34,34,34,34# May 2026

: The repeated "34" is used to determine the number of columns required by the original query. If the number of values (in this case, ten) doesn't match the original table's columns, the database will return an error.

The phrase you provided, -9718 UNION ALL SELECT 34,34,34,34,34,34,34,34,34,34# , is a classic example of , a technique used to probe a database for vulnerabilities. Understanding the Syntax -9718 UNION ALL SELECT 34,34,34,34,34,34,34,34,34,34#

: This likely represents a dummy or non-existent ID. By using an ID that doesn't exist, the attacker ensures the first part of the query returns no results, making the "injected" results from the second part more visible. : The repeated "34" is used to determine

This specific string is designed to trick a web application into running an unintended database command: Understanding the Syntax : This likely represents a

: This SQL operator combines the result sets of two or more SELECT statements into a single result.

: Filter and sanitize all user-provided data to block unexpected characters like UNION , SELECT , or # .

: In many SQL dialects like MySQL, the hash symbol indicates the start of a comment, which "comments out" the rest of the original, legitimate query so it doesn't cause a syntax error. Security Implications