{keyword}' Union All Select Null,null,null,null,null,null,null,null-- Jynz May 2026

If the column count is wrong (e.g., the original query has 7 or 9 columns), the database will return an error.

This specific string is designed to be appended to a vulnerable input field (the {KEYWORD} in your example) to probe the database structure: : Closes the original string literal in the SQL query. If the column count is wrong (e

: Appends a new set of results to the original query's output. If the column count is wrong (e

The primary objective of using this payload is . For a UNION operation to work, the injected query must have the exact same number of columns as the original query. If the column count is wrong (e