sql语句去重问题
Select TOP 30 * From T_Subject Order By NEWID()

去重复

select　TOP 30 *　from T_Subject　where id　in(select distinct id from T_Subject) Order By NEWID() 哪里有问题...
[解决办法]
top 30 里面也有重复的id 哦。

去重复参考
http://bbs.csdn.net/topics/240034273
[解决办法]

select top 30 * from (select distinct * from T_Subject)t order by newid()