从数据库中随机抽N条记录
类别: 数据库教程 
Access:
select top n * from table order by rnd(id)\'id为数据库的自动编号字段
Sql Server:
select top n * from table order by newid()
select top n * from table order by rnd(id)\'id为数据库的自动编号字段
Sql Server:
select top n * from table order by newid()
