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

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.g., the original query has 7 or 9 columns), the database will return an error. NULL is used because it is compatible with

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 original query has 8 columns, the

If the original query has 8 columns, the page will likely load normally or show an extra row of empty data. For a UNION operation to work, the injected

: Attempts to select 8 columns of "null" data.

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.