在SQL Server中将时间格式从3.5转换为3:30

Question

我在SQL Server数据库中有十进制格式的数据，我想转换时间HH：MM格式。

例如：

3 to 3:00    
3.25 to 3:15
3.5 to 3:30
3.75 to 3:45 

非常感谢您的帮助。

Answer 1

乘以60，并将该分钟数加到午夜：

declare @sample table (timeStoredWrong decimal(5,3))
insert into @sample (timeStoredWrong) values (3),(3.25),(3.5),(3.75)

select CONVERT(time,DATEADD(minute,60*timeStoredWrong,0)) as result
from @sample

结果：

result
----------------
03:00:00.0000000
03:15:00.0000000
03:30:00.0000000
03:45:00.0000000

Answer 2

CREATE TABLE #tmp ([time] DECIMAL(6,2))
INSERT INTO #tmp VALUES (3)   
INSERT INTO #tmp VALUES (3.25)   
INSERT INTO #tmp VALUES (3.5)   
INSERT INTO #tmp VALUES (3.75)   

SELECT [time], CAST(CONVERT(TIME,DATEADD(SECOND, [time] * 3600, 0),108) AS TIME) FROM #tmp

DROP TABLE #tmp

Answer 3

@Harzio，请参见此版本：您需要使用此功能CONVERT(CHAR(5), DATEADD(MINUTE, 60*[time], 0), 108)

转换为日期时间

完整的模拟如下：

DECLARE @tmp TABLE  ([Time] FLOAT)
INSERT INTO @tmp
SELECT 3 UNION ALL
SELECT 3.25 UNION ALL  
SELECT 3.5  UNION ALL     
SELECT 3.75   

SELECT 
    [Time],     
    NewTime=CONVERT(CHAR(5), DATEADD(MINUTE, 60*[time], 0), 108)
FROM @tmp

结果在这里：

Answer 4

DECLARE @a money = 3.75;
SELECT FORMAT(FLOOR(@a)*100 + 60*(@a-FLOOR(@a)),'00:00')

Answer 5

--set demo data here
Select * into #YourTable from
(SELECT 3.5 as atime union select 3.2833333333 union select 23.01666) dq;

--change string to float, multiply by 3600 to give seconds, add seconds
--to midnight date, format to HH:MM
SELECT atime, FORMAT(dateadd(s , round(3600 * CAST(atime as float),0) ,CAST('00:00:00' AS time)) ,N'hh\:mm') from #yourtable

--clear up demo data
drop table #yourtable