{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.

NULL is used because it is compatible with almost any data type (string, integer, date, etc.), ensuring the query won't fail due to data type mismatches. 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. ' UNION ALL SELECT NULL

The payload you provided, ' UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- , is a common pattern used in to determine the number of columns returned by an original database query. What this Payload Does If the column count is wrong (e