-9718 Union All Select 34,34,34,34,34,34,34,34,34,34# May 2026
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
This pattern is often the "reconnaissance" phase of an attack. Once an attacker knows how many columns a table has and which ones are displayed on the screen, they can replace the dummy numbers with commands to extract sensitive data, such as usernames, passwords, or system configurations. How to Prevent These Attacks To protect your applications, developers should: -9718 UNION ALL SELECT 34,34,34,34,34,34,34,34,34,34#
: 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
: Filter and sanitize all user-provided data to block unexpected characters like UNION , SELECT , or # . How to Prevent These Attacks To protect your
: Ensure the database user account has the bare minimum permissions necessary to function.