站长资源数据库

SQL Server：
复制代码 代码如下:
Select TOP N * From TABLE Order By NewID()  
view plaincopy to clipboardprint?
Select TOP N * From TABLE Order By NewID()

Select TOP N * From TABLE Order By NewID()

NewID()函数将创建一个 uniqueidentifier 类型的唯一值。上面的语句实现效果是从Table中随机读取N条记录。

Access：
复制代码 代码如下:
Select TOP N * From TABLE Order By Rnd(ID)   
view plaincopy to clipboardprint?
Select TOP N * From TABLE Order By Rnd(ID) 

Select TOP N * From TABLE Order By Rnd(ID)

Rnd(ID) 其中的ID是自动编号字段，可以利用其他任何数值来完成，比如用姓名字段(UserName)
复制代码 代码如下:
Select TOP N * From TABLE Order BY Rnd(Len(UserName))  
view plaincopy to clipboardprint?
Select TOP N * From TABLE Order BY Rnd(Len(UserName))

Select TOP N * From TABLE Order BY Rnd(Len(UserName))

MySql：
复制代码 代码如下:
Select * From TABLE Order By Rand() Limit 10  
view plaincopy to clipboardprint?
Select * From TABLE Order By Rand() Limit 10

Select * From TABLE Order By Rand() Limit 10

postgreSQL：
复制代码 代码如下:
select * from glxt022 order by random() limit 5  
view plaincopy to clipboardprint?
select * from glxt022 order by random() limit 5