https://docs.microsoft.com/en-us/sql/t-sql/functions/rand-transact-sql?view=sql-server-2017
在某一个区间内生成随机数
https://stackoverflow.com/questions/7878287/generate-random-int-value-from-3-to-6
DECLARE @Random INT; DECLARE @Upper INT; DECLARE @Lower INT SET @Lower = 3 ---- The lowest random number SET @Upper = 7 ---- One more than the highest random number SELECT @Random = ROUND(((@Upper - @Lower -1) * RAND() + @Lower), 0) SELECT @Random
生成布尔值
https://stackoverflow.com/questions/20597269/how-to-generate-random-boolean-value-in-sql-server-2008
If you are only generating one row, you could use something as simple as:
SELECT CAST(ROUND(RAND(),0) AS BIT)
However, if you are generating more than one row, RAND()
will evaluate to the same value for every row, so please see Martin Smith's answer.