Question

SELECT TOP 1
        hol_id ,
        CONVERT(VARCHAR(12), hol_date, 112)
FROM    holiday
WHERE   hol_id = 5
UNION ALL
SELECT  hol_id ,
        CONVERT(VARCHAR(12), hol_date, 112)
FROM    holiday
WHERE   hol_id <> 5
ORDER BY CONVERT(VARCHAR(12), hol_date, 112) DESC

我看到了

1   20131218
5   20131018
6   20130818
3   20130405
4   20130311
2   20121129

我想看看

5   20131018
1   20131218
6   20130818
3   20130405
4   20130311
2   20121129

Answer 1

您应该按实际日期（hol_date）排序，而不是按转化的varchar值排序。

假设hol_id 为表格的 Key column（不确定为什么在这里使用TOP 1），请尝试使用ORDER BY CASE进行此查询，如下所示：

SELECT  hol_id ,
        CONVERT(VARCHAR(12), hol_date, 112)
FROM    holiday
ORDER BY CASE WHEN hol_id = 5 
              THEN DATEADD(year,100,getdate()) --Assuming 100 years as max
              ELSE hol_date 
         END DESC

Answer 2

我会计算一个新值来将特定记录移到顶部，如：

order by
      case when hol_id = 5 then 0 else 1 end -- Sort hol_id 5 at the top
    , hol_date desc -- Sort the rest according to date

选择联合所有订单

2 个答案: