order by newid() 各种数据库随机查询的方法 |
|
本文标签：数据库,随机查询 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 |
