order by newid() 各种数据库随机查询的方法

SQL Server：

复制代码 代码如下:

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()

Access：

复制代码 代码如下:

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)

复制代码 代码如下:

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))

复制代码 代码如下:

Select * From TABLE Order By Rand() Limit 10
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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
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select * from glxt022 order by random() limit 5