SQL Server：特定范围内的随机日期（包括随机小时，分钟......）

I would like to create a random date for a SQL Server update query. I found a lot examples for random days or something similar but I couldn't find something which creates a random date with random date, hours, minutes, seconds AND milliseconds.

我想为SQL Server更新查询创建一个随机日期。我发现很多随机天或类似的例子，但我找不到创建随机日期，随机日期，小时，分钟，秒和毫秒的东西。

This is what I use to create the date randomly but it always gives me 00 as hour, minute, seconds and milliseconds and I don't know how I can randomize them as well.

这是我用来随机创建日期但它总是给我00作为小时，分钟，秒和毫秒，我不知道如何随机化它们。

This is my query:

这是我的查询：

declare @FromDate date = GETDATE()-2
declare @ToDate date = GETDATE()-1

UPDATE ACCOUNTS
SET dateFinished=
dateadd(day, rand(checksum(newid())) * (1 + datediff(day, @FromDate, @ToDate)), @FromDate)

3 个解决方案

#1

This is how I'd do it:

我就是这样做的：

1. Work out the number of seconds between from and to
2. 计算from和to之间的秒数
3. Get a random number between zero and the number of seconds
4. 获取零到秒数之间的随机数
5. Add that random number to the FromDate
6. 将该随机数添加到FromDate
7. Finally randomise the number of milliseconds
8. 最后随机化毫秒数

---

DECLARE @FromDate DATETIME = DATEADD(DAY, -2, GETDATE())
DECLARE @ToDate   DATETIME = DATEADD(DAY, -1, GETDATE())

DECLARE @Seconds INT = DATEDIFF(SECOND, @FromDate, @ToDate)
DECLARE @Random INT = ROUND(((@Seconds-1) * RAND()), 0)
DECLARE @Milliseconds INT = ROUND((999 * RAND()), 0)

SELECT DATEADD(MILLISECOND, @Milliseconds, DATEADD(SECOND, @Random, @FromDate))

#2

SELECT dateaddDATEADD(second, 
          second,  (rand()*60+1), 
            DATEADD(minute,
                    (rand()*60+1) , 
                    DATEADD(day, 
                            (rand()*365+1), 
                            DATEADD(year, 
                                    -1, 
                                    getdate()))) )

#3

declare @FromDate dateTIME = '2014-01-01'
declare @ToDate dateTIME = '2014-12-31'

select top 100 dateadd(day,rand(checksum(newid()))*(1+datediff(day, @FromDate, @ToDate)), @FromDate) FROM Tabled(give your table name)