如何爲ID字段創建隨機數在SQL Server中？

Question

如何爲ID字段創建隨機數在SQL Server中？

我想創建介乎1000個隨機數到9999

如何建立這種結構？

Answer 1

RAND是內置函數。它應該滿足您的需求。這應該給你想要的結果：select cast(rand() * 8999 + 1000 as int)

http://msdn.microsoft.com/en-us/library/ms177610%28v=SQL.105%29.aspx

Answer 2

你沒有提到是否要生成獨特的非重複的隨機數。

DECLARE @Random INT; 
DECLARE @Upper INT; 
DECLARE @Lower INT; 

---- This will create a random number between 1 and 999 
SET @Lower = 1000 ---- The lowest random number 
SET @Upper = 9999 ---- The highest random number 
SELECT @Random = ROUND(((@Upper - @Lower -1) * RAND() + @Lower), 0) 
SELECT @Random; 

Source

Answer 3

另一種方法

select number/power(10,len(number)-4) as number from 
(
select top 10000 abs(checksum(newid())) as number 
from sysobjects s1 cross join sysobjects s2 
) as T 

也可參考此http://beyondrelational.com/modules/2/blogs/70/posts/10810/generating-random-numbers-part-ii.aspx