Question

我试过了：

SELECT TIMESTAMPADD(SECOND, FLOOR(RAND() * TIMESTAMPDIFF(SECOND, 2017-01-01', '2017-02-01 ';)), 2017-01-01 );

我想从1月1日到30日随机生成日期

Answer 1

试试这个

SELECT u.cmp,          -- UF values preceding the TRL range
       u.bnd_cd,
       u.start_date,
       LEAST( u.end_date, t.start_date )
FROM   data t
       INNER JOIN
       data u
       ON (    t.bnd_cd = 'TRL'
           AND u.bnd_cd = 'UF'
           AND t.cmp = u.cmp
           AND u.start_date < t.start_date )
UNION ALL
SELECT u.cmp,          -- UF values within the TRL range
       u.bnd_cd,
       GREATEST( u.start_date, t.start_date ),
       LEAST( u.end_date, t.end_date )
FROM   data t
       INNER JOIN
       data u
       ON (    t.bnd_cd = 'TRL'
           AND u.bnd_cd = 'UF'
           AND t.cmp = u.cmp
           AND u.start_date <= t.end_date
           AND u.end_date   >= t.start_date )
UNION ALL
SELECT u.cmp,          -- UF values following the TRL range
       u.bnd_cd,
       GREATEST( u.start_date, t.end_date ),
       u.end_date
FROM   data t
       INNER JOIN
       data u
       ON (    t.bnd_cd = 'TRL'
           AND u.bnd_cd = 'UF'
           AND t.cmp = u.cmp
           AND u.end_date > t.end_date )
UNION ALL
SELECT t.cmp,          -- TRL values preceding the UF range
       t.bnd_cd,
       t.start_date,
       LEAST( t.end_date, u.start_date )
FROM   data t
       INNER JOIN
       data u
       ON (    t.bnd_cd = 'TRL'
           AND u.bnd_cd = 'UF'
           AND t.cmp = u.cmp
           AND t.start_date < u.start_date )
UNION ALL
SELECT t.cmp,          -- TRL values within the UF range
       t.bnd_cd,
       GREATEST( t.start_date, u.start_date ),
       LEAST( t.end_date, u.end_date )
FROM   data t
       INNER JOIN
       data u
       ON (    t.bnd_cd = 'TRL'
           AND u.bnd_cd = 'UF'
           AND t.cmp = u.cmp
           AND t.start_date <= u.end_date
           AND t.end_date   >= u.start_date )
UNION ALL
SELECT t.cmp,          -- TRL values following the UF range
       t.bnd_cd,
       GREATEST( t.start_date, u.end_date ),
       t.end_date
FROM   data t
       INNER JOIN
       data u
       ON (    t.bnd_cd = 'TRL'
           AND u.bnd_cd = 'UF'
           AND t.cmp = u.cmp
           AND t.end_date > u.end_date )

Answer 2

SELECT DATE_FORMAT(FROM_UNIXTIME(
 ROUND((RAND() * (UNIX_TIMESTAMP('2013-12-24')-UNIX_TIMESTAMP('2013-01-07')))+UNIX_TIMESTAMP('2013-01-07'))
),'%Y-%m-%d')

对于第一个UNIX_TIMESTAMP()函数，使用较高的日期，对于第二个和第三个UNIX_TIMESTAMP()函数，请使用较低的日期。

Answer 3

在MS SQL中：

DECLARE @StartDT DATE ='2017-01-01' ，@ EndDT DATE ='2017-01-31'

SELECT DATEADD（DAY，nbr - 1，@ StartDT） FROM（SELECT ROW_NUMBER（）OVER（ORDER BY c.object_id）AS Nbr FROM sys.columns c ）nbrs 在哪里 - 1＆lt; = DATEDIFF（DAY，@ StartDT，@ EndDT）

Answer 4

我认为这是解决方案

 SELECT '2017-01-01' +  INTERVAL ROUND(RAND() * (30-1) + 1) DAY

如何在mysql中的特定日期之间随机生成日期

4 个答案: