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order by newid() 各种数据库随机查询的方法

金沙官网登录,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

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