SQL

Question

我希望获得所有小时数的总和作为最后一行的摘要。我正在使用以下查询来获取结果：

create table time_test (type varchar(10),time varchar(10))
insert into time_test values ('A','01:25')
insert into time_test values ('B','02:30')
insert into time_test values ('C','05:56')
insert into time_test values ('D','00:50')

--select * from time_test

SELECT
  type = ISNULL(type, 'Total'),
  time = substring((cast(sum(((cast(substring (time,2,1) as decimal)*60 + cast(substring (time,4,2) as decimal))/60)) as varchar(10))),1,2)+':' + cast((cast((round(((cast((((cast((substring((cast((sum(((cast(substring (time,2,1) as decimal)*60 + cast(substring (time,4,2) as decimal))/60))) as varchar(10))),4,2)) as int))*60)) as decimal)/100)),0)) as int)) as varchar(10))
FROM time_test
GROUP BY ROLLUP(type);

输出：

如您所见，除了总计算工作正常外，时间还不正确。

问题： 请让我知道我在显示数据时哪里做错了。

提前致谢。

Answer 1

我会首先修正你的数据类型，时间应该存储为 time，而不是 varchar。然后，一旦你修复了你的数据类型，你就可以按原样对待你的数据（一次）。

USE Sandbox;
GO

CREATE TABLE dbo.time_test ([type] varchar(10),
                            [time] time);
INSERT INTO dbo.time_test
VALUES ('A', '01:25'); --Assumes hh:mm
INSERT INTO dbo.time_test
VALUES ('B', '02:30');
INSERT INTO dbo.time_test
VALUES ('C', '05:56');
INSERT INTO dbo.time_test
VALUES ('D', '00:50');
GO

SELECT ISNULL([type],'Total') AS [Type],
       DATEADD(MINUTE,SUM(DATEDIFF(MINUTE,'00:00',[time])),CONVERT(time(0),'00:00')) AS [Time]
FROM dbo.time_test
GROUP BY [type] WITH ROLLUP;

GO

DROP TABLE dbo.time_test;

这个returns:

Type       Time
---------- ----------------
A          01:25:00
B          02:30:00
C          05:56:00
D          00:50:00
Total      10:41:00

Answer 2

我也有类似的需求，是这样解决的：

select type, RTRIM(time/60) + ':' + RIGHT('0' + RTRIM(time%60),2) from
( 
    select type= ISNULL(type, 'Total'),
      time= SUM(DATEDIFF(MINUTE, '0:00:00', time))
    from time_test
    GROUP BY ROLLUP(type)
) x

我相信这样更容易理解也更容易追踪

type    time
A       1:25
B       2:30
C       5:56
D       0:50
Total   10:41

编辑：更新了 hour can be more then 24 hours

的查询

select type, RTRIM(time/60) + ':' + RIGHT('0' + RTRIM(time%60),2) from
( 
    select type= ISNULL(type, 'Total'),
      time= SUM(DATEDIFF(MINUTE, '0:00:00', 
        DATEADD(day, SUBSTRING(time,0,CHARINDEX(':',time,0)) / 24,
        DATEADD(hour, SUBSTRING(time,0,CHARINDEX(':',time,0)) % 24, 
        DATEADD(minute,SUBSTRING(time,CHARINDEX(':',time)+1,LEN(time)) +0, 0)) )))
    from time_test
    GROUP BY ROLLUP(type)
) x

示例结果：

A       1:25
B       2:30
C       5:56
D       70:50
Total   80:41

Answer 3

好的，代码审查速度如此之快，尽量避免使用 VARCHAR 数据类型来存储日期 and/or 时间。

下面是我做的：

create table time_test (type varchar(10),time1 time)
insert into time_test values ('A','00:01:30')
insert into time_test values ('B','00:02:30')
insert into time_test values ('C','00:01:00')
insert into time_test values ('D','00:02:30')

SELECT
  type = ISNULL(type, 'Total'),
  seconds_worked = SUM(DATEDIFF(SECOND, '00:00', time1))
  FROM time_test
GROUP BY ROLLUP(type);

你会看到 Total 达到 450，如果你根据提供的数据手动计算似乎是正确的，即总时间是 450 秒。

您可以使用以下公式 return 您的时间（以分钟和秒为单位）：

RTRIM(**450**/60) + ':' + RIGHT('0' + RTRIM(**450**%60),2)

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