标签：font and 区间 lower OLE lua ber 布尔值 sim
https://docs.microsoft.com/en-us/sql/t-sql/functions/rand-transact-sql?view=sql-server-2017
https://stackoverflow.com/questions/7878287/generate-random-int-value-from-3-to-6
原理，rand函数会生成一个在0到1之间的随机float数。
用这个随机数*区间范围+最小值，就得到一个区间范围内的随机数。然后用round函数去掉小数点后面的。
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
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.
标签：font and 区间 lower OLE lua ber 布尔值 sim
原文地址：https://www.cnblogs.com/chucklu/p/9138402.html
