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

: This ensures the database treats the input as literal data rather than executable code.

: 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. -9718 UNION ALL SELECT 34,34,34,34,34,34,34,34,34,34#

: Ensure the database user account has the bare minimum permissions necessary to function. : This ensures the database treats the input

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

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