如何显示过去 48 小时的军事时间？

Question

我想以 30 分钟间隔显示最后 48 小时的军事时间，并显示日期。

例如：

Military_Hour        Date
0000              2015-02-17             
0030              2015-02-17
0100              2015-02-17
0130              2015-02-17
.                 .
.                 .
2330              2015-02-17

0000              2015-02-16            
0030              2015-02-16
0100              2015-02-16
0130              2015-02-16
.                 .
.                 .
2330              2015-02-16

Answer 1

This answer 可能会帮助您将日期时间转换为军事时间。然后，您可以 select 只是 Military_Hour 的时间和 Date

的日期

This answer 用于查找 30 分钟间隔：

SELECT CONVERT(date, yourDate) AS `Date`,
       CAST(DATEPART(HOUR, CONVERT(varchar(8),yourDate, 108) AS char(2)) + ':' + CAST(DATEPART(MINUTE, CONVERT(varchar(8), yourDate, 108)/30 AS char(2)), as time) AS `Military_Hour`
FROM yourTable
GROUP BY CAST(yourDate AS date),DATEPART(MINUTE, yourDate)/30

如果您想要 #### 格式而不是 ##:##

，您也可以删除连接的冒号

Answer 2

如果您希望从无到有地创建块，请使用此查询。如果您想 round/truncate 在 table 到 30 分钟的时间段内获取数据，那就是另一个问题了。

declare @baseDate date = '20150216';
select
    /* SQL Server 2012 and later */
    --format(timeBlock, 'HHmm') as Military_Hour,
    --format(timeBlock, 'yyyy-MM-dd') as "Date",
    /* or earlier versions */
    timeBlock,
    convert(char(10), timeBlock, 120) as "Date", /* one of many options */
    cast(stuff(
        substring(convert(varchar(20), timeBlock, 120), 12, 5),
        3, 1, '') as char(5)) as Military_Hour /* one of many options */

from
    (
    select dateadd(mi, (u8.n * 6 + u6.n) * 30, cast(@baseDate as datetime)) as timeBlock
    from
        (
            select 0 as n union all select 1 union all select 2 union all
            select 3      union all select 4 union all select 5
        ) as u6,
        (
            select 0 as n union all select 1 union all select 2 union all select 3 union all
            select 4      union all select 5 union all select 6 union all select 7
        ) as u8
    ) as blocks
order by
    timeBlock

如何显示过去 48 小时的军事时间？

How to show military hours for the last 48 hours?

sql

tsql

sql-server