UPDATE `表名` SET `字段名`=ceiling(rand()*500000+500000) WHERE (条件);

原文链接：http://blog.csdn.net/bobay/article/details/24797525

MMP 上面的只能更新一条

UPDATE `表名` SET `字段名`=cast(rand(checksum(newid()))*(24)+1 as int) WHERE (条件);

上面的就是每条都更新的了

下面的只供学习，具体以后能不能用得上，以后再说：：：

update [test].[dbo].[table]

set [table.rand] = cast(rand(checksum(newid()))*(999999-100000)+100000 as float(6))

select newid() 如：57C26BA5-8304-4877-B5D4-256C80428B94

select rand() 如：0.029051900701824

select checksum(500) 如：500

select checksum(newid()) 如：35757911

select rand(checksum(newid())) 如：0.657911662715189

select rand(checksum(newid()))*(999999-100000)+100000 如：881621.124049528

select cast(rand(checksum(newid()))*(999999-100000)+100000 as float(6)) 如：609545.7