{keyword}' Union All Select Null,null,null,null,null,null,null,null-- Jynz 〈2024-2026〉

: Appends a new set of results to the original query's output.

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. : Appends a new set of results to

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

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. the database will return an error.

: This is a SQL comment, which tells the database to ignore the rest of the original, legitimate query that follows. The Goal of the Attack

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