Question

我有带有movieID，movieName和movieDate的电影表。我想首先选择过去24小时内添加的所有电影，并按日期订购，其余订单按newid（）排序。

即

1 babylon 28/09/2010 16:00

2.12 monekys 28/09/2010 8:00

3.se7en 25/09/2010 5:00

4.snatch 26/09/2010 18:00

我怎样才能实现它？

最终答案是所有其他答案的组合，这些答案都做得很好......

declare @date smalldatetime
set @date = dateadd(dd,-2,getdate())

DECLARE @d AS int
SET @d = DATEPART(ss, GETDATE()) + 3

   select
    movieID,
    movieTitle,
    movieDate
    from Movies
    order by 
        case 
            when movieDate>@date 
            then movieDate end desc, movieID % @d

Answer 1

另一个要测试的人。

ORDER BY 
  CASE WHEN movieDate >= DATEADD(hour, -24, GETDATE()) THEN movieDate END DESC,
  CHECKSUM(NEWID())

Answer 2

尝试类似（未经测试）的内容：

SELECT
  *
FROM (
  SELECT -- start with the newest movies
    movieID,
    movieName,
    movieDate,
    1 AS rnk -- new will need it to sort them property
  FROM
    movies
  WHERE
    movieDate >= DATEADD(h, -24, GETDATE()) -- from last 24 hours
  UNION ALL -- there will be no duplicates (so, so)
  SELECT
    movieID,
    movieName,
    movieDate,
    2 AS rnk -- goes after the newest ones
  FROM
    movies
  WHERE
    movieDate < DATEADD(hh, -24, GETDATE()) -- older then 24 hours
 ) AS movies
 ORDER BY
   rnk, 
   CASE WHEN rnk = 1 THEN movieDate ELSE newid() END -- order by movieDate newest movies and by newid() older ones

您确定要显示所有超过24小时的电影吗？

movieID列上模数的可能技巧会更快，然后使用newid()函数进行排序。

而不是像newid()这样的东西：

DECLARE @d AS int
SET @d = DATEPART(ss, GETDATE()) + 3 -- to avoid division by 0

然后在ORDER子句而不是newid()使用movieID % @d。

Answer 3

这样的事情：

ORDER BY
    CASE
        WHEN [movieDate] BETWEEN DATEADD(d, -1, GETDATE()) AND GETDATE() 
            THEN [movieDate]    
        ELSE [movieID]
    END DESC

Answer 4

尝试

DECLARE @date AS datetime
SET @date = DateAdd(hh, -25, GetDate())

SELECT
  *
FROM (
  SELECT
    movieID,
    movieName,
    movieData,
    movieDate AS dateToOrder
  FROM
    movies
  WHERE
    movieDate >= DateAdd(h, -24, GetDate())
  UNION ALL
  SELECT
    movieID,
    movieName,
    movieData,
    @date AS dateToOrder
  FROM
    movies
  WHERE
    movieDate < DateAdd(hh, -24, GetDate()) -- older then 24 hours
 ) AS movies
 ORDER BY dateToOrder DESC, movieID

按日期对sql中的项目进行排名

4 个答案: