Null,null,null,null,null,null,null,null,'qbqvq'||'uzdkfzllnipajpnqeapztdofmchpsjcuzybcghsg'||'qqbqq'-- Ufot | -7178 Union All Select

: Used as placeholders to match the number of columns in the original database table.

: If this unique string appears in the application's output, it proves the website is vulnerable to data theft. : Used as placeholders to match the number

: Attempts to combine the results of the original query with a new, custom row. : Used as placeholders to match the number