- mssql,access,mysql,postgresql中的随机查询语句
发布时间:2011-05-05 类别:SQL技术 来源:侠客工作室 -
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SQL Server:
Select TOP N * From TABLE Order By NewID()
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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:
Select TOP N * From TABLE Order By Rnd(ID)
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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)Select TOP N * From TABLE Order BY Rnd(Len(UserName))
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Select TOP N * From TABLE Order BY Rnd(Len(UserName))Select TOP N * From TABLE Order BY Rnd(Len(UserName))
MySql:
Select * From TABLE Order By Rand() Limit 10
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Select * From TABLE Order By Rand() Limit 10Select * From TABLE Order By Rand() Limit 10
postgreSQL:select * from glxt022 order by random() limit 5
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select * from glxt022 order by random() limit 5- ☆☆☆技术交流群:5684178☆☆☆
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